Anything related to gas traditionally causes some concern. But gas instantaneous water heaters have been used for many decades in city apartments that are not connected to a centralized hot water supply system, so the technology can be considered well-tested and reliable, and with the current level of technological development, it is also absolutely safe if operating conditions are observed.
- Are gas water heaters safe?
- Advantages of gas instantaneous water heaters
- Disadvantages of geysers
- How does a gas water heater work?
- How to choose a gas water heater?
Design and principle of operation of the product
A standard water heater is a metal box that is comparable in size to a kitchen cabinet. Inside it is the main system and mechanism that ensures the operation of the equipment. In addition, two pipes are connected to the box, which are responsible for the supply of water and gas.
The design itself consists of the following basic elements:
- rear panel.
- draft cap.
- gas and water supply valves.
- copper heat exchanger.
- main burner.
- pilot burner.
- electronic circuit.
- battery compartment.
When the water tap is opened, a valve in the mechanism is activated, through which gas is supplied to the pilot burner, which is responsible for igniting the main burner. This process directly depends on the type of equipment ignition. During the combustion of fuel, the amount of thermal energy that is necessary to heat water to a certain temperature is released. Thermal energy passes through a spiral-shaped heat exchanger, resulting in rapid heating.
After the water is heated to the desired temperature, the process of supplying it from the column to the open tap, through the outlet pipe, is carried out. The gas combustion products formed during operation are released into the atmosphere through ventilation or a chimney, which is a prerequisite for installing such a heating system.
It is also important to know that geysers presented by manufacturers on the market are of two types:
- storage water heater;
- a flow-type device operating from a gas supply.
Characteristics that you need to pay attention to when choosing the optimal model:
- amount of hot water consumed. Using the device simultaneously by several residents may result in insufficient heated liquid accumulated in the heating tank.
- use with a centralized pipeline is not recommended by experts, as there is a possibility of insufficient pressure.
- installation feature. Storage tanks of the device, as a rule, are large in size (depending on the volume of liquid contained), so there is a need for a suitable location (floor or solid wall).
Performance and Power
To correctly select the power of an instantaneous gas water heater, decide on the type and number of water intake points.
These two characteristics are the most important, since they directly determine how much hot water the selected water heater can produce. Productivity directly depends on the power of the selected unit. For example, a 23-24 kW dispenser can provide water treatment up to 14 l/min with heating at 25 degrees. This performance is enough to simultaneously take a shower and wash dishes.
Want a more economical option? Then take a closer look at low-power models, from 16 to 19 kW. They will provide preparation up to 9-10 l/min, this is enough for a washbasin with a kitchen sink or for a comfortable shower at any temperature. Do you want to provide hot water to more consumers? Then you need to take a closer look at geysers with a power of 28 kW and above.
When choosing a geyser, you need to remember that their characteristics indicate performance when heating water by 25 degrees. If you need to increase the heating temperature by reducing the pressure, then the performance will be completely different. However, it is almost never necessary to heat water above +40 degrees - there is no need to force the water heater to work at the limit of its capabilities.
Advantages of instantaneous water heater
Having decided to acquire this type of device, you first need to familiarize yourself with its main characteristics, model range, leading market manufacturers, as well as the advantages inherent to the device.
Advantages of gas models:
- a gas flow-through heater is a budget option. This fact is explained by the fact that gas, which serves as the main fuel, is quite cheap in price compared to similar sources such as electricity, gasoline, etc.
- The power of the city gas supply system is usually enough to install such a water heater at home.
- availability of several connection options - to natural and liquefied gas.
- affordable pricing policy of manufacturers.
- multifunctionality. With their help, you can simultaneously provide hot water not only to the kitchen, but also to the bathroom with shower.
- Compact dimensions allow installation in rooms with limited space. The system does not take up much space, leaving space for more efficient use.
- Fast heating is a feature that other devices used for these purposes, for example, storage columns, cannot offer. The latter are the optimal solution for those who consume large quantities of hot water, but the heating process still requires time.
The average power of flowing gas equipment is 18-19 kW, which is quite enough for the normal life of the residents of the house. In addition to the technical parameters, it is also important to mention the appearance. The modern design of the products is significantly different from previous analogues, and goes well with the elements of any interior.
How to choose a geyser
What to look for when choosing the best geyser?
Power
As a rule, buyers choose flow-type gas water heaters. Their average productivity is about 10 l/min, which is enough to provide hot water to both an apartment and a country house.
However, it is worth paying attention to the number of water supply points - if you need to “pump” hot water into several rooms, the column must have several outlets.
Control
Gas water heaters have two types of fuel ignition - electric ignition and piezo ignition. The first is more convenient due to the fact that it automatically turns on the device when you open a hot water tap. The second one is mainly launched using a special button.
It should also be noted that there are two types of electric ignition - from batteries and from the mains. In the first case, you save on electricity, but you will have to periodically change the batteries. The second option involves connecting to an electrical network, which complicates the installation of equipment. But the option powered by 220V is not always suitable for a dacha where there are problems with communications.
Dimensions
If, when choosing a water heater, you chose a gas water heater, then you should understand that it will take a certain place in your apartment or house. Unlike electric instantaneous heaters, such devices are unlikely to be disguised as a kitchen cabinet, so before purchasing, you need to decide in advance on the place where the column will be installed. But most models will fit into the interior without any problems due to their stylish design.
Economical
A geyser is an ideal option if saving is a key factor for you when purchasing.
Whatever consumption is declared by the device, it is worth remembering that using such a water heater will in any case be cheaper than a device powered by electricity. In this case, it does not matter much whether it is natural gas or liquefied fuel from a cylinder.
Additional features
When choosing a column, pay attention to the possibility of connecting the device to a liquefied gas cylinder. In this case, the device will be mobile. If necessary, it can be transported and installed at a dacha where there is no centralized gas pipeline.
Also a nice addition will be an electronic control system with a display, thanks to which you can not only easily adjust the set temperature, but also monitor (and even correct) possible errors in the operation of the device.
Checklist when buying the best geyser
- If you are choosing a device for a summer house or country house without communications, pay attention to models powered by liquefied gas cylinders.
- When choosing a geyser, you need to understand the capabilities of your water supply. When purchasing a device with a capacity of over 13 l/min, make sure that the water pressure in the apartment/house will allow you to use the declared power.
- If you have frequent power outages at home, then you should purchase a speaker with electric ignition from batteries or with piezo ignition. Otherwise, with a power outage, you will lose hot water.
Equipment disadvantages
One of the significant disadvantages of this type of heating apparatus is the fire safety and explosion hazard of the fuel used during operation. In case of breakdowns, repair work must be carried out immediately. Only in this case will it be possible to avoid undesirable consequences in the form of fuel leakage, which negatively affects the human respiratory tract.
Before purchasing and installing such a water heater, you must first evaluate the supply power in the gas supply lines. If it is insufficient, then installation is absolutely not possible. In such cases, only storage type equipment can be installed.
The performance of the speaker can be significantly affected by the level of humidity in the room where it is installed. It is worth remembering that some manufacturers do not recommend installation in wet areas, and do not provide appropriate guarantees if this condition is violated.
Ignition type
How to choose a gas instantaneous water heater based on this characteristic? First, you should understand that there are three types of ignition:
- Electric;
- Piezoelectric;
- Hydrodynamic.
Electric ignition is economical. It operates on batteries and generates a spark using a small high-voltage electronic circuit. Columns with such ignition are safe, since they do not have a constantly burning pilot light. There is also no additional gas consumption. But there are also disadvantages - you need to regularly change the batteries, since a low ignition voltage causes startup with a bang.
For normal operation of gas instantaneous water heaters with electric ignition, it is advisable to use powerful alkaline (alkaline) batteries.
Piezoelectric ignition allows you to get rid of the purchase of expensive batteries - and this is a definite plus. In addition, it ignites the gas in the burner instantly, since there is a constantly lit pilot light above it. But the igniter wastes gas, and leaving it lit in the absence of household members is unsafe. It also causes additional gas consumption.
Hydrodynamic ignition uses an electric generator to operate, which supplies an electric current of varying strengths, depending on the water pressure.
Hydrodynamic ignition is the safest and most economical. Inside the columns with this type of ignition there is a small generator driven by water. When the tap is opened, water begins to flow through the generator blades, as a result of which it produces the current necessary to generate a spark. There is no additional gas consumption, no need to buy batteries - all advantages. The increased cost of a column with hydrodynamic ignition and reduced reliability of the system are disadvantages.
We recommend that you go with electric ignition or piezoelectric. Good batteries will ensure reliable ignition, and a burning igniter will create the conditions for an instant start of the burner.
Safety level of a household geyser
Among specialists working with gas appliances, there is an opinion that safety lies in the details. This is precisely the statement that applies to the type of equipment under consideration. Most manufacturers are trying to improve their models as much as possible by introducing various sensors and systems.
Very often on the market you can find speakers with LED screens that report on the functional status of the device, possible breakdowns and failures. They also contain a number of parts and devices that make using the water heater more convenient and safe:
- modern thermostats allow you to adjust the level of heating and supply of hot liquid in the event of a change in pressure in the water supply system. That is, by reducing the pressure in the pipes, the risk of supplying boiling water, which can get burned, is eliminated. At the same time, it is also possible to adjust the flow rate of the consumed liquid and the power of the burner.
- When there are changes in the gas supply, the burner is able to independently adjust the height of the flame produced. The presence of a safety valve allows you to block the fuel supply if the tap is closed, thereby minimizing the likelihood of overheating.
- draft sensor - responsible for stopping the gas supply in the event of reverse draft formation or its complete absence.
- timer – allows you to program the time for turning off the column.
- The automatic heating system prevents the equipment from freezing when the room temperature drops.
Criteria for choosing a geyser
In order not to make a mistake in your choice, before purchasing you should pay attention to a whole set of basic and additional characteristics of the water heater. This will help you choose really high-quality and functional equipment that suits your needs.
Key technical indicators
This category includes power, performance, material and quality of the heat exchanger and the number of sensors.
Characteristic #1 - combustion chamber type
According to the type of combustion chamber, all water heaters are divided into two categories: with an open chamber or atmospheric, and with a closed chamber or turbocharged.
Atmospheric ones are considered more durable, since such devices do not have complex automation. Turbocharged ones operate using electricity and turn on even with minimal gas pressure, but they are more expensive.
Method of removing combustion products:
- Through the chimney . It is appropriate if the column is atmospheric. It is necessary to have the chimney cleaned from time to time by appropriate services.
- Gas is forced out through the coaxial channel For this purpose, the column has a fan powered by the mains. This option is suitable for new buildings, since there is no chimney.
Owners should check the traction condition as often as possible. It is best to check with paper. This test should never be carried out with a lighter or match, otherwise an explosion may occur.
A double coaxial pipe is used to remove carbon dioxide. Through the inner pipe, recycled gas goes outside, and through the outer pipe, fresh air enters the kitchen
Characteristic #2 - device power
The amount of heated water you can get directly depends on this indicator. There is useful and consumed power. When choosing a device, pay attention to the usable power.
The optimal power indicator ranges from 17 to 50 kW. To be able to simultaneously turn on several water consumption points, the power must be at least 21 kW. For a large house, you should choose a speaker with a power of 25 kW or more
Feature #3 - Performance
Productivity is the amount of water heated by the column per minute. To correctly calculate the required performance, you need to know the pressure force.
This is quite easy to do. It is necessary to write down the number of cubes on the meter, turn on the water for 1 minute. After this time, tighten it, and then record the readings again. The difference between the second and first values will be the desired value.
If there is no meter, substitute a large container. Today there are columns with a capacity of 5-6 liters. They are suitable for apartments with low pressure and old pipes. For two or three people, 12-14 liters will be enough.
Feature #3 - heat exchanger
The durability of the column depends on the quality and thickness of the material of this part. Steel ones are durable, but heavy. Such heat exchangers are inexpensive, but are susceptible to corrosion.
Regular copper ones are short-lived. Heat exchangers made of highly purified copper have, compared to steel, greater efficiency.
Such parts should be cleaned carefully and only with special products. If you choose the wrong detergent, the part may become unusable. For example, acid corrodes copper products and they subsequently begin to leak.
The rules and methods for manually servicing the dispenser are discussed in detail in this article.
To ensure safe use for boiler users, special parts are used:
- The water overheating sensor will protect you from boiling water, and the safety valve is responsible for the emergency release of water if there is high pressure in the pipes.
- The hydraulic valve will protect the column parts from overheating.
- The ionization and combustion sensors are triggered if gas is still flowing after the burner goes out.
- The flow sensor turns off the water heater if the hot water tap closes.
- The draft detector goes off if the chimney is clogged with debris to prevent carbon monoxide poisoning. And if there is no required water pressure, the low water pressure sensor is activated and the column will not turn on.
A lot depends on their quality. All these details will protect not only the device itself from breakdown, but also your health.
Additional information about the technique
Also, when choosing a gas water heater, you should pay attention to additional characteristics. For example, the appearance of the front panel is important, since a black speaker will not fit into a white kitchen.
On the front panel of the speaker there is a small LED screen displaying temperature indicators and three operating knobs. For Winter-Summer mode, as well as flame and temperature controls
The area of the bathroom or kitchen and the dimensions of the speaker itself. If the kitchen is small and 3 people use the water, then it’s worth finding a place in the bathroom or sacrificing space.
Gas type . Pay attention to what gas is supplied to the house. If liquefied gas is supplied to the cottage, then it is strictly forbidden to install a water heater that runs on natural gas. Such an oversight can cause an explosion or poisoning.
If there is little space in the kitchen, then a compact water heater can be installed in the bathroom. Turbocharged speakers are not suitable for this purpose, otherwise there is a risk of carbon monoxide poisoning
Ignition type. Old speakers are turned on using a match, which lights the wick. Today the following types of inclusion are used:
- piezo ignition is performed using a button on the device panel;
- electronic ignition - a spark from the battery occurs when the water is turned on;
- from a hydrogenerator - when turned on, the turbine is activated, which generates electric current. And he creates a spark.
This indicator is not the main one, but the comfort of using the speaker depends on it.
We provided more detailed recommendations for choosing a gas water heater in the next article.
Many speakers do not come with batteries. Find out in advance which batteries are suitable. Experts recommend using alkaline batteries, they are more powerful
Before installing a gas water heater, it is important for specialists to assess the condition of the gas pipes, the pressure level and eliminate faults, if any. Such precautions are necessary to avoid gas leaks and poisoning of residents.
In addition, installation should only be ordered from professionals, because not only your health depends on it, but also the possibility of obtaining a warranty on the gas appliance.
How to choose the optimal water heater model?
The primary selection criterion is the performance of the device and the purpose of its use. As a rule, for private homes where water can be used simultaneously in the kitchen, bathroom, and shower, models with a power of 23-24 kW, flowing up to 15 l/min, are considered optimal. If you only use a shower and a kitchen tap, then a power of 17-18 kW is sufficient, providing 10-11 l/min.
Of course, the power of the equipment can be adjusted (decreasing or increasing the height of the burner flame):
- manual adjustment - changing the position of the handle will allow you to adjust the thermal power. With a large flow of water, the temperature will be lower, and the opposite situation with a low flow.
- automatic adjustment - the flame height is independently adjusted based on the amount of liquid flow.
Ignition type
Ignition in modern models can be carried out in several ways:
- piezo ignition.
- automatically from a battery spark.
- automatically from a hydraulic turbine spark.
The first of the presented methods, the most outdated, involves the conversion of mechanical movement into an electrical discharge. When turned on for the first time, the user needs to press a button, which will activate the built-in piezoelectric element. The spark formed during the process will ignite the igniter and the main burner. Apart from the number of manipulations performed, this method is not economical. When ignited, the igniter burns for some time, thereby consuming gas (an increase in raw material consumption by a quarter has been recorded).
The last two methods do not require human intervention. When the tap is unscrewed, the ignition starts automatically, as well as the fan and the supply of combustible material. The only difference between them is the source of spark formation. For example, the operating life of a battery is about a year, and in the case of a hydraulic turbine, it is necessary to monitor the pressure, it should be no lower than 0.45 atm.
Popular manufacturers
An important criterion when choosing is the company’s image, its experience, production capacity, and ongoing modernization. The reliability of the finished column depends on the professionalism of the workers, and largely on the company. Let's look at the main players in the market:
- Neva is a model of quality that meets European standards. When designing their models, the designers paid special attention to the safety parameter, so the product can contain many programs that make the models much more stable and reliable.
- Bosch, as a rule, equips its equipment only with modern developments, which not only increase functionality, but also guarantee a high level of security.
- Oasis – manufactures equipment that fully corresponds to the quality and prices set. The mechanisms of this TM are not as expensive as the previous ones, but they have the necessary set of additions.
Each of these manufacturers presents on the market models with different characteristics and parameters, which may also differ in the way combustion products are removed:
- atmospheric (open chamber) - all substances are removed through the chimney.
- turbocharged (closed chamber).
Types of geysers and evaluation criteria for the selected model
Geysers are divided according to several important criteria. You need to know this when studying the rating and choosing a device for your home or apartment.
In short, modern models of gas water heaters may differ in the following parameters and features:
- By type of ignition.
- According to the type of burners installed in the device.
- By type of combustion chambers
- In terms of power and performance of the device.
In addition, gas water heaters are often of the instantaneous type, but there are expensive models that can also operate in storage mode - a boiler.
Types of ignition of geysers
Speaking about this characteristic, it is necessary to immediately note that there will be no significant differences in the operation of the device itself with different types of ignition. The difference largely concerns ease of use.
At the moment, there are speaker models on the market with three different types of ignition - manual, piezo and electronic.
Prices for geysers
geyser
- Manual ignition is already very rarely used - it can only be found in older models. Such columns are lit with a match after the gas supply valve to the wick is opened. When igniting, it is necessary to act extremely carefully, since if the match is not brought in time, a flash may occur if there is a large accumulation of gas.
- Piezo ignition. This ignition option operates on the principle of a conventional lighter. The mechanical force applied to the piezoelectric element causes an electrical discharge, accompanied by the appearance of a spark, from which the ignition wick gas ignites. To light a column with piezo ignition, you just need to press a special button. After a few seconds, hot water will flow from the open tap.
- Electronic ignition is the most convenient. However, to operate models with this function, an autonomous power supply is most often required - usually batteries placed in a special compartment.
Different models use different types of batteries to create a spark. The automation of the column reacts to the appearance of a water current in the pipe, the spark plug is triggered, igniting the fire first in the igniter wick, and then from it the flame is transferred to the water heater burner. The installed batteries are enough for uninterrupted operation of the device for a year. There are models that do not require batteries - the necessary electrical potential for the spark plug is generated by a turbine driven by a flow of open water through a column.
Types of burners
Currently, manufacturers install different types of burners in different models of water heaters - with constant power or stepwise variable, as well as modulating ones.
- Burners with constant or step-changeable power require manual adjustment of the water temperature. They are very dependent on water pressure, so often when installing them on the upper floors of tall buildings, problems with ignition and stable combustion may occur. Typically, such units have two control handles - one for setting the amount of water flowing through the heat exchanger, the second for adjusting the flame level.
- Modulation burners are installed in modern models. They are controlled by built-in automation, which ensures heating of water to a certain temperature, regardless of its initial temperature and the pressure in the water supply system (of course, within the permissible range). Special sensors monitor all input and output parameters and regulate the optimal height of the flames.
It is also convenient that if several hot water supply points are used simultaneously in a house or apartment, then the temperature will be maintained at the same temperature at all of them. For example, if one of the household members is standing under the shower, and another turns on the hot water in the kitchen, the temperature of the water in the shower will not change. Automation will instantly take into account the increased consumption and make adjustments to the operation of the device.
Gas water heaters equipped with similar automation with modulating burners are, of course, more expensive, but this is fully justified by the comfort of their operation.
Open and closed combustion chambers
Everything here should be clear from the title.
- An open chamber involves taking the air necessary for the combustion process directly from the room. And the combustion products are discharged to the upper part of the body, where there is a pipe for connecting a chimney that works on the principle of creating natural draft. That is, the mandatory difference in height between the heating device and the chimney head must be observed.
The disadvantages are obvious - it is necessary to take into account the additional air flow into the room where the column is installed, and the requirements for organizing exhaust ventilation are sharply increased, since it is difficult to completely eliminate the entry of combustion products into the room. In addition, creating a chimney for such a column is quite a large-scale and expensive undertaking, and in the conditions of a city apartment, if a common chimney is not provided for by the house design, it is completely impossible.
But for a private house, this is a completely acceptable solution, since the existing conditions, as a rule, allow you to build a chimney. Such speakers usually do not have a high price, and therefore for such conditions they are a very attractive option.
- The closed combustion chamber has no contact with the atmosphere in the room where the geyser is installed. A special coaxial chimney supplies the air necessary for combustion into it through one channel, and the second channel serves to discharge combustion products directly to the street. That is, even in a city apartment it is quite possible to install such a column - just make an opening in the wall for the exit of a coaxial chimney. Of course, its placement is also regulated by certain rules, but usually they allow this to be done.
- By the way, a few words should be said about the once so popular small columns with an open combustion chamber that do not require connection to a chimney. The sad history of their operation is replete with tragic cases of people being poisoned by gas combustion products. Therefore, in many regions they are generally prohibited at the legislative level, even if all the necessary conditions are created - forced exhaust ventilation, which some owners simply forgot or were too lazy to turn on again.
Good advice: if such a device does come across on sale, and sellers assure you of its convenience and complete safety, it’s not worth the risk. Moreover, the very insignificant power and performance of such models is unlikely to provide the expected increase in comfort, but there will be many more problems.
Power and performance of gas water heaters
These parameters of geysers can be called the main ones, which you should focus on when choosing a device, since the overall ease of use and the full provision of a family’s everyday life with hot water depend on them.
Prices for gas water heaters "Zanussi"
gas water heaters "Zanussi"
All flow gas heaters according to this parameter can be divided into three groups:
- Low power devices, up to 15 kW. The productivity of such dispensers is usually limited to 8–9 liters of heated water per minute, which is only enough for one water collection point. A water heater with such power will be enough for a one-room apartment with one or two residents, where water consumption is not too high, and the likelihood of simultaneous use of hot water in several currents is extremely low.
- Heaters with an average power of 16 ÷ 23 kW. These columns are capable of heating 10 ÷ 15 liters per minute, and are already capable of supporting simultaneous consumption in two points, for example, in the kitchen and shower.
- Columns with a high power of over 23 kW heat 15÷20 liters of water per minute, and this is quite enough for all the household needs of a large family. However, such models are already distinguished by their impressive dimensions and rather high cost, that is, their purchase should be justified. Otherwise, excess power, and during their operation, will lead to a significant irrational increase in the costs of both gas and water.
It is quite possible to calculate the required power and productivity of a gas water heater yourself. In a standard apartment, as a rule, two or three heated water intake points are installed - in the kitchen and two or one in the bathroom. In one minute, when using the shower, about 6 liters of water are consumed, and from the tap in the kitchen - about 4. If you open the taps in the bathroom and kitchen at the same time, the flow rate will be approximately 10 liters per minute. Of course, you should add a small margin to this, that is, aim for approximately 11 ÷ 12 l/min.
(The values of 6 and 4 liters mentioned above are very arbitrary, although they are considered sufficient. But some people like to use high water pressure both in the shower and when washing dishes. No problem - the flow rate is easy to determine experimentally: measure the time and accumulated per minute number of liters at optimal, from the owners’ point of view, water pressure).
The performance is always indicated in the column passport. But let’s not howl about an important nuance - it is shown for a nominal increase in water temperature by a certain number of degrees. For example, 10 l/min at Δt= 25 °C.
But another indicator is overlooked - the inlet water temperature. Agree, it can be + 5 °C in winter, and +18 °C in summer. And at the exit it is always advisable to have a temperature of at least +40 ° C - it is considered comfortable both for washing dishes and for water procedures.
What is the correct way to calculate power and performance indicators for different temperature conditions at the inlet from the water supply?
The table below may help:
| Temperature of tap water at the inlet to the column | The amount of water heated to +40 °C, depending on the power of the column (liters per minute) | ||||||||
| up to 3 kW | 6 kW | 8 kW | 12 kW | 15 kW | 18 kW | 21 kW | 24 kW | 27 kW | |
| 5 °C | 1,3 | 2,75 | 3,6 | 5,5 | 6,75 | 8,25 | 9,4 | 10,75 | 12 |
| 10 °C | 1,5 | 3,1 | 4,2 | 6,1 | 7,75 | 9,25 | 10,75 | 12,3 | 13.75 |
| 15 °C | 1,75 | 3,6 | 4,75 | 7,25 | 9,0 | 10,75 | 12,75 | 14,3 | 16.2 |
| 18 °C | 2,1 | 4,3 | 5,75 | 5,5 | 10,7 | 12,9 | 15,0 | 17,25 | 19.25 |
You can use a formula that takes into account the temperature difference at the inlet and outlet, the expected (or experimentally determined) flow rate and the heat capacity coefficient of water. In order not to torment the reader with independent calculations, the author of the publication “enclosed” this formula in an online calculator:
Calculator for calculating the required power of a gas water heater
Go to calculations
The calculator is simple, and probably does not require additional explanations to carry out the calculations.
What else should you pay attention to when choosing a gas water heater?
- So, taking into account Russian realities, the best option would be a column equipped with a modulating burner. If the pressure in the water supply system and the gas main is inconsistent, a burner of this type will smooth out the resulting differences.
- Very important qualities of devices for this purpose are built-in levels of protection. This makes modern gas water heaters safe even when installed in a residential area of a house or apartment. And there are many of these levels:
— The water flow sensor (water unit) allows the main gas valve to open only when the hot water tap is turned on, if its pressure corresponds to the acceptable range for this model.
— The flame sensor (thermocouple or ionization) will shut off the gas supply when the igniter wick goes out.
— The draft sensor will shut off the gas if combustion products are not removed in full.
— Temperature sensors limit the maximum permissible heating and provide information to the automatic control unit.
— Modern models may have other levels of protection, for example, gas analyzers that assess the cleanliness of indoor air.
- In the dispenser's passport, you should look at the permissible types of gas and the required pressure in the gas pipeline.
- The operating pressure range in the water supply must be indicated. If the pressure is insufficient, the column may simply not work - it may be necessary to install a pressure-increasing pump. Excessive pressure can negatively affect the column heat exchanger - causing unnecessary deformation or even leaks. It is possible that there will be a need to install a reducer in the water supply system.
- Of course, the linear dimensions of the water heater are taken into account - they must correspond to the planned location of its installation.
- The owners’ desire for general aesthetics is quite understandable, so for many, the external design of the speaker becomes one of the selection criteria.
- And, of course, the “money issue” always remains a concern, that is, the cost of equipment.
Video: Expert recommendations - how to choose a gas water heater
User reviews
Alexey Revenko, Moscow
I have been using a Neva Transit gas water heater for 3 years now. It is very convenient to manage, since it does not require unnecessary knowledge and skills from me; everything is controlled by a standard program. I would like to note that this type of heating is more profitable than centralized supply. In the latter case, it was very difficult to count on even warm or room temperature, but now I have the opportunity to choose the degree of heating myself, while saving significantly.
Nina Alekseeva, Ekaterinburg
After purchasing a new apartment, we immediately began replacing the plumbing and all related components. We thought for a very long time about what to do with the central water supply, and the craftsmen advised us to use a gas water heater, since the pressure in the pipes facilitates installation. I can say one thing: we were very pleased with the resulting effect and never regretted it.
Oleg Golod, Perm
This type of technology is a real find. This is what it means: technological progress does not stand still. Despite the fact that I only recently purchased the Neva 4011, I have already experienced all the advantages.
Useful article? Rate it and add it to your bookmarks!
Advantages and disadvantages of gas instantaneous water heaters
As we have already said, gas instantaneous water heaters have a number of advantages and disadvantages. In some ways, their use is completely justified, but in some cases it is desirable to use electrical equipment. Key benefits:
- Cost-effective – using gas water heaters allows you to spend less money on preparing hot water. The savings are most noticeable with intensive use;
- Powerful electrical wiring is not needed - electric instantaneous water heaters, if normal performance is required, will require a separate supply line. You also need good grounding;
- They can work in non-gasified premises - for this you need to purchase a model with the ability to be powered from a gas cylinder.
There are also a number of disadvantages:
- The complexity of installation and connection - it is advisable to have a specialist do this ;
- The need for regular maintenance - you have to pay for this separately;
- Possible gas leaks - the high explosiveness of natural gas makes it necessary to carefully monitor gas equipment. For example, a column with piezo ignition needs to be extinguished when no one is at home;
- It takes time to heat up the water - the same electric storage water heaters supply hot water almost immediately.
Despite certain disadvantages, it is customary to install gas instantaneous water heaters in gasified houses - they are economical and can provide hot water to several water supply points at once.
The disadvantage of gas instantaneous water heaters is that their use in some buildings is simply prohibited. Also, they cannot be installed in modern new buildings where there is no gas supply.
How do you pay for gas without a meter?
How do you pay for gas without a meter?
Gas stove
So, if the apartment has a gas stove (but no gas water heater or gas heating), then it is assumed that each tenant spends 10 cubic meters of gas per month. A family of three people - 30 cubic meters, of five people - 50 cubic meters.
This calculation method is beneficial to the management company, but not to consumers. After all, you cook for the whole family at once, and not everyone for themselves. And small children do not use gas at all.
One cubic meter of gas in the second half of 2022 in Novosibirsk costs 5.835 rubles.
It turns out that each resident of an apartment with a gas stove pays 58 rubles 35 kopecks per month.
There are three Ivanovs in the family; gas costs them 30 × 5.835 = 175 rubles 5 kopecks per month. There are five Petrovs, for them gas costs 50 × 5.835 = 291 rubles 75 kopecks per month.
The Petrovs have a gas water heater. It is assumed that they spend 16.2×5 = 81 cubic meters of gas on heating water.
Therefore, they receive a monthly bill for 81 × 5.835 (dispenser) + 50 × 5.835 (stove) = 472.63 + 291.75 = 764 rubles 38 kopecks per month (of which 472 rubles 63 kopecks are for the gas consumed by the dispenser).
The house where the Ivanovs live has hot water supply, so they do not pay for gas heating of water. Otherwise, we would have spent 16.2×3×5.835 = 283 rubles 58 kopecks on this, and the total gas bill would have been 26.2×3×5.835 = 78.6×5.835 = 458 rubles 63 kopecks.
Device Features
Modern gas water heaters differ from old ones in the same way as, say, condensing gas boilers differ from Soviet-era AGVs. The new equipment is characterized by compactness, efficiency, automation of work and the presence of more advanced safety systems. In particular, water heaters with a closed combustion chamber have already appeared, as well as models capable of operating in condensation mode, for example Bosch Therm 8000 S WTD 27 AME, which consume 15-40% less fuel. So there will be no problems with replacing equipment.
Instantaneous gas water heater Bosch WTD 27 AME
Moreover, new technologies will help solve old, painful problems associated, for example, with poor ventilation, which regularly arise in apartment buildings. After all, according to the rules, in a room with a gas water heater there must be ventilation, both supply and exhaust. It is for this reason that in old houses bathrooms were often equipped with a window. Supply ventilation ensures the supply of oxygen necessary for combustion, while exhaust ventilation removes gas in the event of a possible leak or the appearance of carbon monoxide. And if in the apartment the hood grate is clogged with cobwebs and dust, there is no air supply, there are plastic windows, doors with high-quality seals, and there is also an electric hood above the stove - the operation of the heater is almost guaranteed to be disrupted.
Ariston
Model FAST R 10/14 (Ariston), temperature control option, battery operated.
"Rusklimat"
Model Zanussi Fonte Glass, electronic ignition, glass front panel.
For example, you turn on the kitchen hood, the fan overpowers the natural draft at the column, and the chimney begins to work as an air supply. The thrust is overturned. Cold air from the street enters the room through the chimney, the draft sensor does not work, it is cooled by cold air, carbon monoxide with flue gases enters the living room.
In such situations, it is best to use columns with a closed combustion chamber. These models are equipped with their own fan, which provides forced air supply and removal of combustion products. They are usually equipped with a coaxial chimney, which has two channels: supply and exhaust. If there are problems with ventilation or in the absence of a normal chimney, such a column can be hung almost anywhere and the coaxial chimney can be taken to the street.
Columns with an open combustion chamber are structurally simpler and cheaper in cost, but more stringent requirements are imposed on the rooms where they are installed.
As for dispensers with an open combustion chamber (atmospheric dispensers), they require a chimney with a certain cross-section and a so-called acceleration section (a vertically located part of the pipe after the dispenser outlet channel). Both of these parameters are determined by the gas equipment manufacturer and are indicated in the dispenser’s passport. In particular, the length of the acceleration section is at least three to four diameters of the chimney pipe. If it is not possible to provide a chimney with the required characteristics, then the selected column model cannot be installed.
The chimney material must withstand high temperatures and be gas-tight so that combustion products do not enter the room.
Instantaneous gas water heater Zanussi Fonte Glass Venezia
How much gas do we actually use?
How much gas do we actually use?
Gas stove
Let's try to understand whether the standard is reasonable. How much gas do we spend on cooking?
If you turn on all four burners of an average stove to maximum, it will consume approximately one cubic meter of gas per hour. A large burner will burn 0.375 cubic meters, two medium ones - 0.25 each, a small one - 0.125.
The Ivanovs and Petrovs have ordinary stoves. The Petrovs also have a gas oven, while the Ivanovs have an electric oven. The oven consumes 0.4 cubic meters of gas per hour.
Ivanov, in order to use up his standard (30 cubic meters), you need to turn on each burner at full power for an hour every day (1 cubic meter x 30 days). In principle, this is possible, although for this you need to really love cooking.
Petrov, in order to spend 50 cubic meters, you need to turn on the stove in the same mode (30 cubic meters) plus use the oven 25 times a month for two hours (0.4 × 2 × 25 = 20 cubic meters). That is, fry, steam and bake almost non-stop.
Typically, a gas stove consumes from 5 to 40 cubic meters per month - depending on the size of the family, the model of the stove and the intensity of its use.
If you want to understand whether the meter is profitable for you, look at how many hours a day you use each burner, and how many hours the oven works, and calculate the gas consumption (see above). If it comes out to significantly less than 10 cubic meters per month (0.33 per day) per person, the meter will definitely come in handy.
The Ivanovs love to cook and the three of them spend 0.55 cubic meters of gas on weekdays, and 2 cubic meters on weekends. There are on average 9 weekends and 21 weekdays per month. The Ivanovs’ consumption is 9×2 + 21×0.55 = 18 + 11.55 = 29.55 cubic meters of gas per month.
With a meter, they will save 0.45 × 5.835 = 2.63 rubles per month. With such introductory costs, even the cheapest meter will not pay for itself.
The Petrovs, of whom there are five in the family, spend the same 0.55 cubic meters of gas every day, and on weekends they bake something in the oven for about three hours. They spend 30×0.55 + 9×0.4×3 = 16.5 + 10.8 = 27.3 cubic meters of gas. This is noticeably less than the standard.
With a meter, they will pay 27.3 × 5.835 = 159.29 rubles per month. The saved 132 and a half rubles will allow them to pay for an inexpensive meter (with installation) in two and a half years.
Geyser
Is the gas standard for a water dispenser reasonable? Do we really spend 16.2 cubic meters of gas per month (that is, 0.54 cubic meters per day) to heat water?
To imagine how much gas a dispenser consumes, you need to know how much water has to be heated.
Heating 400 liters of water to the standard 55 °C will require 2.7 cubic meters of gas. 81 cubic meters of gas will be produced per month, which will cost 472 rubles 63 kopecks.
It turns out that in order to consume the required amount of gas, the Petrovs need to spend 400 liters of hot water per day, that is, 80 liters per person. And per month, that means 12 cubic meters. This is quite difficult - remember our last article.
The Petrovs installed a meter on the pump and made sure that it consumed only 60.75 cubic meters of gas per month, that is, 2.025 cubic meters per day. This means that the Petrov family uses 300 liters of water per day - 60 per person. 9 cubic meters of hot water per month is quite a lot, by the way.
And now heating the water costs them 60.75 × 5.835 = 354 rubles 47 kopecks. So they save 118.16 rubles per month on the pump. Plus another 132.45 rubles - on the stove, in total - 250 rubles and kopecks a month, three thousand a year.
Gas heating
The Smirnovs actually spend 15 cubic meters per day, 450 per month (7.5 per cubic meter). This is a lot, but still less than the standard. And the Sidorovs, although their apartment is exactly the same, is 6 cubic meters per day, 180 per month (3 per cubic meter).
The Smirnovs considered it unwise to install a meter until they could reduce gas consumption. And the Sidorovs delivered. And now they pay for gas 180 × 5.026 = 904.68 rubles per month, saving 2110.92 rubles. Agree, it’s more than nice.
The more external walls there are, the more heat is lost. Therefore, in corner apartments, gas consumption is always higher, and even more so in detached houses. The Kuznetsovs spend 22 cubic meters of gas per day, 660 per month (5.5 per cubic meter). This costs them 3,317.16 rubles (2,714.04 rubles less than it would have to according to the standards).
Temperature adjustment and flame modulation
To make it easier to adjust your water heater, we recommend taking a closer look at models with a display that will display the temperature of the heated water.
A gas instantaneous water heater should be easy to operate. That is, not only the gas supply level, but also the pressure must be regulated here. This way, you can ensure the operation of the column even with reduced water pressure in the tap. It is also desirable to have a liquid crystal display that will display the temperature of the water leaving the instantaneous water heater. In the absence of a display, the heating level will have to be adjusted “by touch,” which can result in burns.
Temperature control is present in all gas instantaneous water heaters. But flame modulation is not available everywhere. Why is this option needed at all? It will allow you to maintain the temperature of the water at the outlet of the gas water heater when the pressure of water and gas changes. For example, conventional water heaters change the outlet water temperature when the toilet is flushed or when an adjacent cold water tap is opened. The presence of flame modulation will allow you to maintain the temperature at a given level.
Flame modulation works quite slowly, so it may not respond immediately to a sudden change in water pressure. Fortunately, this almost never happens. Also, speakers with flame modulation are characterized by some slowness when reaching temperature. But this is better than getting burned from excessive hot water when starting a regular column. Therefore, our choice is the presence of flame modulation - a really useful thing.
How to install a meter?
How to install a meter?
Contact the gas service and write an application for installation. Take with you documents that confirm your ownership of the apartment, and a paid receipt for gas for the last month.
The gas service will tell you where and what type of device you can buy. It’s not worth taking any and anywhere - it may not suit you. When you buy a meter, go to the gas service again. They will calculate how much the installation costs. At the same time, they will set a date for the master to come.
Most popular models
The best geyser is a device that is praised not by sellers and the manufacturer, but by consumers. Therefore, before purchasing a gas instantaneous water heater, we strongly recommend reading reviews and paying attention to the most popular models. Let's see which speakers buyers are most often interested in.
Geyser Neva 4511
This column from the Russian company Neva received fairly high user ratings. The device has a capacity of 11 l/min and a power of 21 kW. The column is equipped with an open combustion chamber, an electric ignition system, power-on and heating indicators, and a thermometer. Gas control is also provided. For its operation, the column requires batteries, which power the ignition system. The design of the device is very simple, and the price will please every buyer.
The water heater has received many user reviews, both positive and negative. The number of positive reviews exceeds the number of negative reviews, which is already a big plus. Among the advantages we can include the undoubted simplicity of the model, ease of temperature adjustment and the presence of a thermometer. The downsides are a rather weak heat exchanger and poor performance at low water pressure. But overall, this is a decent device from the budget segment.
Geyser Electrolux GWH 265 ERN Nano Plus
This is one of the best geysers from a renowned manufacturer. Her reviews are mostly positive - we can safely regard her as the optimal choice. Buyers praise the device for its stable operation at low water pressure and ease of settings. Users also note the presence of such a useful option as monitoring the battery status. The appearance of the device is also pleasing - it is immediately clear that this is a completely modern gas instantaneous water heater.
The Electrolux GWH 265 ERN Nano Plus dispenser has a power of 20 kW and a capacity of 10 l/min. It is equipped with an open combustion chamber, a pleasant control panel with an informative display, a thermometer, and numerous security systems. Support of heating temperature at a given level is also implemented. The ignition system is electric, runs on batteries. The minimum inlet pressure is 0.15 atm.
Geyser Bosch WR 10-2P
The best geyser from Bosch according to users. In any case, she is very popular. If we compare it with other models, we can note the efficiency of the device - with a productivity of 10 l/min, its power is 17.4 kW. There is no electric ignition here, but there is a simple piezoelectric ignition. It lights the burner instantly, saving users from loud bangs when the batteries are dead. There is no flame modulation on board, so households will have to periodically adjust the heating temperature.
Reviews about the device are mostly positive - more than 70%. Therefore, it is not surprising that the column has gained such high popularity. It is difficult to identify critical failures, since there are very few of them. Positive features include reliable starting at low water pressure and automatic temperature maintenance.
How else can you save money?
How else can you save money?
Gas stove
Place dishes (kettle, pots, pans) on a suitable size burner. If the burner is larger, you heat the air unnecessarily. If it is less, the bottom heats up unevenly. Cover the dishes with a lid - this reduces heat loss by about 20%.
Heat the contents of the cookware to the desired temperature as quickly as possible. But after boiling, it is better to reduce the gas - the fire should not lick the walls of the pan. Don't burn gas in vain - for example, don't let water boil away in a kettle.
It is best to use energy-efficient stainless steel cookware with a polished bottom and a copper or aluminum layer. True, it costs more than usual. And throw away dishes with a deformed bottom - they waste one and a half times more gas.
An electric kettle, a coffee maker instead of a cezve, a microwave, a multicooker - all these appliances save gas (although they increase electricity costs).
And please remember the safety rules. Do not use the stove for heating. Do not dry clothes over it.
It sounds ridiculous, but some people still do this. But it’s so close to trouble. Starting a fire this way is as easy as shelling pears.
Geyser
A dishwasher saves at least 20 liters of hot water per day. To heat 20 liters, the dispenser spends 0.135 cubic meters of gas. This will be 4.05 cubic meters per month. On them you will save 4.05 × 5.835 = 23 rubles 63 kopecks. It's a small thing, but nice.
If you have an old gas water heater with a constantly burning wick, it is better to replace it. The wick spends from 5 to 20 cubic meters of gas per month, that is, it wastes up to more than a hundred rubles.
Don’t forget about special devices for saving water - we talked about them in the last article.
Because You are not logged in. To come in.
Because The topic is archived.
then you will have to pay for verification.
it will never pay off, all the counters are made in order to milk the people
It’s a no brainer that if it were unprofitable for the authorities, then the meters would be banned immediately =)) ¶
counters are a legal drain on the population.
it's like a loan. There are a lot of scams like “money now” with 2 percent per day.
meters remind you of the same thing - they lure you in with the idea that you will pay less. This is true. but that's all.
but then for installation, verification, repairs of this meter, or reprogramming there - all this will happen in the distant future, God forbid you will be forked out there.
For a hundred years in Soviet times we lived without meters and everything was fine. and now they say that people overpaid for water and gas! that is, install a meter and you will save and pay 3 times less. Wow. that is, all these years, for example, since the 1970s, they paid 3 times more? so let's recalculate then, return the excess overpaid, you yourself admitted it =))
Top 7 rating according to KP
Bosch WR 10-2P (RUB 10,718)
Bosch WR 10-2P.
Photo: yandex.market.ru This device has a power of 17.4 kW, due to which its productivity is up to 10 l/min, and the maximum heating temperature is up to 60 degrees. Adjustment is made using convenient mechanical switches.
Reliable protection against leaks is achieved due to an increased operating pressure range - from 0.1 to 12 atm. But for safe operation, an additional air duct is necessary, since the device is equipped with an open combustion chamber.
An important point is that this model uses piezo ignition, the operating principle of which is based on the ignition of fuel by a silicon spark. According to experts, this type of “ignition” is more reliable than electric, because in the latter, burnt-out components often fail. Although it deprives the device of “automation”.
Also among the advantages of this device it is worth noting its relatively small dimensions and ease of installation. Gas and water connections are made from below, so you can connect the necessary hoses and install the device on the wall yourself without any problems.
There are two versions of this column on the market - P23 for natural gas from a gas pipeline and P31 for liquefied gas from a cylinder. Thus, the device can be used both in an apartment with a centralized gas supply and in a country house.
Advantages and disadvantages
Compact dimensions, piezo ignition, power, ease of installation, ability to operate from a cylinder
Sensitivity to water quality
show more
Ariston FAST EVO ONT C 11 NG RU (RUB 14,360)
Ariston FAST EVO ONT C 11 NG RU. Photo: yandex.market.ru
The main advantage of this geyser is that it is able to independently maintain the set temperature parameters, regardless of how many taps are connected to it and open at the moment. This allows you to simultaneously use hot water in the bathroom and kitchen without worrying about the pressure or temperature dropping.
Ignition occurs using electric ignition, only, unlike many analogues, the source of electricity is a 220V network, and not batteries. If we consider this water heater for an apartment where there are no problems with the electricity supply, then this option will help to save a lot on batteries.
It is worth mentioning that this device requires fine tuning during installation - it is important to observe the pressure specified in the instructions. It is even recommended to contact a specialist during installation - this will help avoid early equipment breakdown and extend its service life.
Advantages and disadvantages
“Smart” control system, power supply, informative display
Installation difficulties
show more
Mora Vega 10 (RUB 19,250)
Mora Vega 10. Photo: yandex.market.ru
This geyser is perfect for both apartments and small houses. The thermal power of 17.3 kW is not outstanding, but due to the wide pressure range (from 0.2 to 10 atm), the device can operate with any pressure.
The device is equipped with electric ignition, which quickly ignites the fuel, and the “gas control” function eliminates any gas leaks. Protection against overheating will prevent premature failure of the water heater, and limiting the temperature will allow you to choose the optimal parameter for comfortable use of hot water. At the same time, this model is easy to use, which is also a definite plus.
In addition, to install this device you do not need to invite a specialist - thanks to the detailed instructions, you can install the water heater yourself.
Advantages and disadvantages
Simple operation, convenient installation, wide operating pressure range
At low pressure, heating decreases, high price
show more
How to quickly dry clothes after washing
It is not uncommon for laundry to constantly remain damp or even wet.
Hyundai H-GW1-AMW-UI305 (RUB 9,900)
Hyundai H-GW1-AMW-UI305. Photo: yandex.market.ru
This instantaneous gas water heater has a power of 20 kW and a capacity of 10 l/min. It starts with an electric ignition powered by batteries. The stability of temperature and gas flow is controlled by a built-in electronic unit, and a convenient display will help you track the set parameters. With its help you can find and fix faults.
The body of the device is made of enameled steel, and the burner is made of stainless steel. The heater is made of copper with a wall thickness of 0.5 mm. It is important to note here that geysers with copper heat exchangers are preferable for apartments or houses with constant hot water consumption, because They conduct heat as quickly as possible and thereby reduce heating time.
This model is available in two color options – black and white. This will allow the water heater to fit into almost any design.
Advantages and disadvantages
Housing in two colors to choose from, copper heater, convenient display
The device works well with only one water intake point
show more
Ariston S/SGA 100 (RUB 26,080)
Ariston S/SGA 100. Photo: yandex.market.ru
The most expensive model in our top and the only storage type water heater. The large volume - 95 liters - allows you to provide hot water to several water points at once, which is enough for a family of 2-4 people. The column is started using piezo ignition by pressing a special button.
Despite the constant support of the flame, the gas consumption of this model is small - up to 0.55 cubic meters. m/hour. Such efficiency was achieved thanks to the high efficiency and effective thermal insulation of the storage unit, made of high-density environmentally friendly polyurethane foam.
To prevent corrosion, the inner surface of the tank is coated with heat-resistant enamel at the factory. Additional protection is provided by a magnesium anode, which is recommended to be changed once or twice a year (depending on the hardness of the water) to increase the service life of the device.
If you follow the operating rules, this model will serve you for many years. Its reliability is evidenced by the fact that it has been produced since 2006 and is still considered one of the best in its price category.
Advantages and disadvantages
Piezo ignition, efficiency, reliable corrosion protection, durability
High price
show more
Neva 4510-M (RUB 7,950)
Neva 4510-M. Photo: yandex.market.ru
This domestically produced water heater is an excellent choice in terms of price/quality ratio for those who are considering budget options. It is universal due to the fact that it can operate both from natural (centralized gas pipeline) and from liquefied gas (from a cylinder).
A power of 17.9 kW provides a productivity of 10 l/min, which is suitable for both an apartment and a whole house. In addition, the device is equipped with several water collection points, which allows you to simultaneously use it in different rooms - for example, a bathroom and a kitchen. In addition, like many analogues, the device has a bottom communications connection, which simplifies installation.
Other advantages include quiet operation, a thermometer for temperature control on the front panel, and battery-powered electric ignition. Moreover, the smart electric ignition system consumes a minimum of energy, which will free you from the need to frequently change batteries. The column starts at a minimum pressure of 0.1 atm, which means you should not be afraid of low water pressure.
Of the minuses, perhaps, the only thing worth highlighting is the low quality of materials, which affects the service life of this water heater.
Advantages and disadvantages
Possibility of operation from a cylinder, low threshold of required water pressure, several water collection points
Low quality materials
show more
Bathroom heating
How to effectively heat a bathroom in apartments and private houses
Bosch WRD 13-2G (RUB 21,790)
Bosch WRD 13-2G. Photo: yandex.market.ru
The model is one of the most powerful in our top - 22.6 kW. Thanks to this, its productivity reaches as much as 13 l/min, and this compensates for the increased (relative to many analogues) price. The column turns on at a pressure of 0.35 atm, which allows it to operate even with low water pressure.
The device can operate both from a centralized gas pipeline and from a liquefied gas cylinder, so it can be used in a country house where there are problems with communications. In addition, the advantages include a high-quality security system that turns off the water heater if its temperature becomes higher than permissible.
As for the minuses, the main disadvantages of this model are the noisy hydrogenerator, as well as the inconvenient location of the gas and water inlets and outlets. The device has an open combustion chamber, which requires an additional air duct.
Advantages and disadvantages
High performance, ability to operate from a cylinder, low threshold of required water pressure, safety
High price, noisy hydro generator, inconvenient connection
show more
This is interesting
The best water heaters for a summer residence
Where to buy a gas water heater
Gas instantaneous water heaters are sold in plumbing and heating stores. Here, customers will have a large selection of products and the opportunity to get acquainted with the selected device in person - for example, in a regular store they can evaluate the appearance of the speaker. As for online stores, there are also advantages - the ability to exchange and return goods without explanation within 14 days, a huge selection, the ability to order rare models, reviews from other customers.
It is impossible to give any specific recommendations regarding where to buy the speaker. Focus on the fame of the stores, quality of service, assortment and availability of suitable models for sale.
