Rating of instantaneous gas water heaters without a chimney: best offers and selection tips

Here you will learn:

• Geyser Oasis Glass 20VG
• Geyser Oasis, 24 kW, white
• Geyser Oasis Glass 20ZG
• Geyser Oasis B-12W
• Geyser Oasis TUR 20
• Geyser Oasis 26 kW, white

Oasis geysers have gained their popularity due to their simplicity of design and extremely affordable price - the simplest model can be purchased for 6-7 thousand rubles. They are installed in individual apartments and private households, preparing hot water under powerful burners. The combustion chambers in Oasis geysers are open, which is another reason for the low cost of the equipment.

In an effort to provide its customers with simple but modern water heating technology, the manufacturer has done a good job on the design of the speakers. In this regard, speakers from the Oasis Glass range appeared on the market. Their fundamental difference is the finishing of the front panels with glass with certain patterns. Thanks to this, Oasis geysers fit perfectly into the interiors of bathrooms and kitchens. For more convenient control, all models are equipped with small liquid crystal displays that display the heating temperature. There are three controls in total:

• Flow regulator;
• Gas supply regulator;
• Winter-summer switch.

Simplicity and accessibility have become the main trump cards of Oasis gas instantaneous water heaters. Let's see what users say about them.

In addition to the reviews themselves, we will publish the advantages and disadvantages identified by users during operation.

Geyser Oasis Glass 20VG

Renat
We decorated the kitchen in the apartment in dark colors and decided to find a column that would match the main color tone. The only acceptable offer in our city was the Oasis Glass 20VG gas water heater, black, with a glass panel and with a beautiful picture. The seller immediately warned that this was the simplest speaker, but we weren’t looking for any bells and whistles. The problems began six months after the purchase - this semi-Chinese monster began to go out, and it was impossible to set the desired temperature. After another month, we threw this speaker into the trash and bought a normal Italian speaker. I won’t recommend Oasis - don’t get burned by Chinese cheap stuff.

Advantages:

• Solid appearance - the speaker fits perfectly into our dark kitchen. Also, there were other colors on sale;
• Affordable price - Oasis geysers are affordable for everyone.

Flaws:

• It goes out for no apparent reason - you can’t count on a comfortable shower;
• It is impossible to regulate the temperature - it jumps all the time, up and down.

Geyser Oasis, 24 kW, white

Elena
The main criterion when choosing a speaker was the price. We didn’t want to buy complete nonsense, so we decided to go with an Oasis gas water heater. We chose a 24 kW model with a flow rate of up to 12 l/min. This is quite enough for a kitchen faucet and a shower stall, even if you turn them on at the same time. The speaker pleased with its compactness and pleasant appearance. The number of regulators is minimal - set the desired temperature and forget. In winter you have to increase the temperature, since there is no automatic temperature monitoring. The ignition runs on two batteries; no connection to the electrical network is required, which is a big plus for our area.

Advantages:

• The speaker is very compact, not very thick, and the design is extremely neat;
• For ease of setup, a solid “five”, since there is nothing superfluous here - only basic functionality.

Flaws:

• The main disadvantage is the high noise level. If you increase the gas pressure, it makes a lot of noise, and this noise can be heard in the rooms;
• The batteries run out quickly - we don’t use it that actively, but we have to change the batteries every month. I know for sure that they should last a long time, but for some reason this is not the case.

How to solve a problem

If the filter is clogged, you should remove this part from the device. Clean it with a stiff brush and water. If, during cleaning, a violation of the integrity of the filter is noticed, it is worth replacing the part with a similar one.

If the hot water pipe is clogged, you should run cold water in the opposite direction. The plug is removed, a container is placed under the device under water and both taps are turned out. The spout is closed with your finger. It is considered possible that cold water will push the clog forward.

Why does the water in the gas water heater not heat up?

It is not recommended to use chemicals that remove scale from the column. Their composition can easily destroy the metal surface. The best option is to use citric acid, which is dissolved in hot water.

If the blockage has advanced further than the pipes, it can easily penetrate into the faucet. The most “vulnerable” places where blockages mainly appear are considered to be a thin rubber hose, a filter and a faucet. The problem can be solved by disassembling the mixer and performing a thorough inspection. Dirt is removed using running water.

Geyser Oasis Glass 20ZG

Natalya
I fell in love with this column at first sight, not yet knowing how much disappointment it would bring. This unit has become a real curse, as it lives its own life. The Oasis gas water heater lights up and goes out at the most inopportune moment. And the worst thing is that not a single master has yet been able to say what is wrong with her. Visually everything is fine, the burner is not clogged, the chimney works perfectly, it has been checked more than once. But the pump continues to go out, tormenting everyone in the household. And recently water started dripping from it. And every day it dripped more and more. It turned out that literally within a year the heat exchanger had become almost completely unusable. I understand perfectly well that this is an initially cheap speaker, but it should have lasted at least several years?

Advantages:

• Good appearance, with pattern on the front;
• Low price is an excellent advantage over competitors with similar characteristics.

Flaws:

• The “independent” life of this speaker is simply infuriating; preventive inspections and replacement of some components did not help get rid of problems with the unit;
• Short service life of the heat exchanger, it feels like it was already rotten and rusty from the very beginning;
• Sometimes it lights up with a bang that scares a small child.

Poor pressure

Let's look at what affects the water pressure in a gas water heater:

1. Presence of blockages. Every pipe through which water moves tends to become clogged with debris. If we take an Electrolux geyser as an example, the blockage occurs in the mesh filter filled with lime and rust. If the water flow is low, the pressure will be minimal.
2. Engineering works. In this case, scale appears inside the heat exchanger. When the water is shut off and the water unit of the gas water heater resumes operation, a “water hammer” occurs, after which some of the scale penetrates into the mixer and forms a blockage.
3. Device power. For Bosch geysers and other models, the power of the device is important. It will create good pressure in the system. If the power of the device is less than eight, then the pressure will be minimal. For good operation of the geyser water unit, it is worth purchasing a device with a power of eight to ten kilowatts.
4. Scale. It usually occurs in metal containers in which water is brought to a boil. In a gas water heater, the heat exchanger is considered a tank. With hard water, scale forms on its walls, which subsequently moves into the tubes, due to which the pressure decreases.
5. Preventive actions. Any device, including a geyser, needs regular maintenance, namely the prevention of blockages. In most cases, a decrease in water pressure occurs due to careless use of the device.

Geyser Oasis B-12W

Denis
There is no chimney in my bathroom, so I bought myself an Oasis B-12W gas water heater. It is unusually compact and narrow, just perfect for small spaces. The productivity of this model is small, only 5 liters per minute, so it can only work with one water collection point - either a faucet in the kitchen, or a washbasin or shower head. This is quite enough for me, so I immediately paid close attention to this column. The ignition here is electric, but if the batteries run out a little, the spark becomes weak - the batteries have to be changed very often. There are also difficulties with setting the temperature; sometimes you have to struggle with the settings.

Advantages:

• The absence of the need for a chimney will certainly please those who simply do not have a chimney. The column emits little combustion products, so they are sent directly into the atmosphere;
• Small sizes, just for small spaces;
• No need to connect to the mains.

Flaws:

• The batteries run out very quickly, so they cost 200 rubles a month;
• The case is very thin, it feels like it’s made of foil.

Installation Features

Installation of a chimneyless geyser must be carried out by specialists. You can only connect the equipment to the water supply yourself. Sometimes home craftsmen also build a chimney with their own hands, making a hole in the wall. The installation of the pipe must be carried out as tightly as possible, therefore special attention must be paid to thermal insulation using adapters and couplings.

Geyser Oasis TUR 20

Stanislav
Before you buy this speaker, think about how many problems it will bring you in the first year of operation. Firstly, it makes noise like an aircraft turbine. As soon as you increase the gas volume, an increasing hiss can be heard in the bedroom. It lights up with a roar, scaring those around. And secondly, this column has a simply disgusting heat exchanger. My temperature regulator is set to the minimum level, but there is almost nothing left of the heat exchanger! It literally burned out, turned into some pitiful scraps - but this could lead to a fire! I wanted to find the official website of the manufacturer of Oasis geysers, but I couldn’t find it - and who should I leave my complaints to? It would be better to buy an Astra gas water heater, as a friend recommended.

Advantages:

• The only advantage of the Oasis TUR 20 geyser is its affordable price - I bought it for only 10 thousand;
• I don't know if nice design can be considered a virtue, but so be it.

Flaws:

• Terrible heat exchanger, the manufacturer should take care of choosing a different heat exchanger. Let the speaker be 1000 rubles more expensive, but it will last longer;
• It makes a noise when working, I consider such a noise unacceptable;
• The battery fastener broke off in the first month - the plastic latch should be flexible, not rigid;
• As it cools down, something clicks loudly inside;
• Difficult to identify faults.

Geyser Oasis 26 kW, white

Roman
I needed a simple column for a country house. I wanted to purchase the simplest model, with a minimum of settings and options. I was thinking about buying a gas water heater from Junkers, but the Oasis 26 kW gas water heater caught my eye. The reviews about it are not the best, but I was captivated by the price - only 8500. It has been at the dacha for almost a year, we have not experienced any special problems, it is not loud, but not very quiet either, as befits a cheap model. There are main protective modules on board, and the capacity is 13 l/min. An excellent model for unpretentious users.

Advantages:

• A pleasant price that fully corresponds to the capabilities of the speaker;
• Easy control, only three knobs (I still don’t understand why the “winter-summer” switch is needed);
• Strict design, neat execution.

Flaws:

• Only open combustion chamber. I wanted to find a model with a closed combustion chamber, but it turned out that Oasis speakers only come with open chambers;
• Sometimes it goes out, and for no apparent reason.