Choosing an electric boiler for heating 100 square meters

Electricity is the most environmentally friendly type of fuel. Electric boilers are easy to operate and install, since they do not require a separate room for the boiler room, a chimney, or supply and exhaust ventilation. From the point of view of practicality and comfort, provided there is a stable power supply, this is an ideal heating equipment option.

However, despite the lower initial cost of electric boilers, heating a private home with electricity is extremely expensive. It is also worth considering that an electric boiler for heating a house with an area of ​​100 square meters is a powerful unit that requires connection to a three-phase network (380 V), since a single-phase (220 V) will not be able to operate at full power. If you live permanently, you need an electric boiler with a power of more than 10 kW, the installation of which requires coordination with the Energonadzor services.

The use of electric boilers for heating a house of 100 square meters

For heating a small room up to 100 sq.
m need a low-power electric boiler With all the advantages of an electric boiler, its use costs a tidy sum. Therefore, when choosing a model, cost becomes the second most significant factor after power. Economic considerations limit its use:

• Installing an electric boiler is quite justified if people do not live in the house permanently in winter and only come for weekends. The unit provides quick heating of the premises, and in 2 days it does not have time to generate a lot of electricity. From the proposed models, choose the cheapest: its cost will cover the cost of electricity for a long time.
• If you live in the house permanently, it is beneficial to combine an electric boiler with a gas or solid fuel one. The electric device turns on when the main boiler does not work for some reason. In this case, to heat a house of 100 square meters. m. a device with a power of 3–6 kW is sufficient. It is connected to a single-phase network.
• The most unfavorable solution is the main heating using an electric unit. But when installing gas or solid fuel is not possible, they choose this option, trying to choose the most economical model.

For stable operation, the electric boiler is connected through a stabilizer. If it serves as the main source of heat, it is advisable to also purchase a generator in case of a power outage.

Alternative energy sources

There is no clear answer to this question, since each individual case has its own nuances. For example, on your plot of land there are many old large trees that are just asking to be used to fire a wood-burning boiler.

Option two: in exchange for certain services, the customer is ready to supply you with diesel fuel or coal for a long time. It is clear that in such situations you will be inclined to these types of energy carriers and not pay attention to others. In the long term, this will be a mistake, since such sources will sooner or later dry up and you will have to look for other ways to heat a country house or buy the same fuel, but at a generally accepted cost.

Types of electric boilers

Aggregates are classified according to a variety of criteria. Boilers are single- and double-circuit - also capable of heating water for hot water supply, floor-mounted and wall-mounted, single- and three-phase. Of interest to the consumer is the heating method:

• The heating element is the cheapest, but also the most uneconomical option. Its efficiency is not higher than 80%; heating elements quickly become covered with plaque, which impairs heat transfer. This model is suitable as an auxiliary heat source.
• Electrode - efficiency above 90%, heats water instantly. The device must be grounded during installation.
• Induction - the manufacturer promises an efficiency of 99%. This efficiency is achieved by smoothly regulating the power of operation without peak loads.

Electricity consumption in an electrode and induction boiler can be reduced by selecting a control unit.

New heating element

Induction electric boilers

Electrode boiler

With manual control

The control consists of verniers, with the help of which the degree of heating is set. It is impossible to indicate the coolant temperature. You can only monitor the parameters of heated water experimentally. Such models are equipped with safety systems - in the event of power surges or insufficient pressure, they turn off, preventing a short circuit. However, the device cannot signal the owner about malfunctions or problems with the power supply.

Electronically controlled

4.5 kW electric boiler with the ability to program modes.
The thermostat allows for more fine-tuned operation. The device evaluates not the temperature of the coolant, but the temperature of the air in the room - it works until the room actually becomes warm. In this case, it becomes possible to change the specified temperature so that the boiler, for example, at night, heats the rooms to a lower temperature and saves electricity.

The unit is equipped with an LCD display. It displays the current mode, room temperature, and boiler operation order.

The thermostat can be installed later if the electric boiler design allows fine tuning.

With programmers

A 100 m2 electric boiler with a programmer allows you to set the operating mode for a week at once. The consumer indicates the room temperature during the day, evening, and night for 7 days. This reduces electricity costs. If there is no one in the house, the boiler reduces the heating intensity, and an hour before the owners arrive, it increases it, so that by the time they arrive the house will be warm and cozy.

Prices: summary table

Specifications

A main use boiler with a power of 10 kW must be connected to a three-phase network.
All electrical units have minimal weight, are compact, and easy to use. You can install any of them yourself. Select a device based on other parameters:

• Power - each model is capable of heating only a certain area. Boilers with ratings of 3–6 kW are designed to heat 50–60 sq. m. For heating 100 sq. m. requires a unit with a power of at least 10–10.5 kW. But if the boiler is only an auxiliary heat source, buy the lowest power model.
• What consumption does an electric boiler assume for heating a private house of 100 m2 is the second most important factor. Information on energy consumption is indicated in the device instructions. In this case, its efficiency is taken into account. The heating element indicators will have to be reduced by 20%. The efficiency of induction is close to 100%, so its nominal parameters are considered actual.
• Single- or three-phase - main electric boiler for 100 square meters. m. can only be three-phase.
• Additional options – pump type, control method.
• Execution – floor or wall. They do not need additional ventilation or a chimney, so the boiler can be installed in any room.

The choice is also influenced by other factors: the ability to heat water, the number of heating elements, and the method of adjusting the power.

Calculation of thermal power by room volume

To roughly calculate the thermal power required to heat a warehouse, you can use the method that is usually used by company managers who advise clients. The formula below applies:

• V – internal volume of the room, presented in cubic meters
• W is the total thermal power per room, expressed in kilowatts (kW). It is equally valid for ALL types of boilers.

To determine the volume of the room, you need to use another formula:

• V – actually, internal volume
• S – area expressed in square meters
• h – ceiling height, expressed in meters

So, using formulas, we can determine that a warehouse with a ceiling height of 5 m and an area of, for example, 200 sq.m. for normal heating it will require about 40 kW of thermal energy.

For a more accurate calculation of warehouse heating, the so-called thermal insulation coefficient of the room or thermal dissipation coefficient (K), which corrects for insulation, must be taken into account:

• 1.3 – for heating a warehouse with poor thermal insulation, or with a large glazing area,
• 1 – for standard thermal insulation,
• 0.8 – for heating well-insulated warehouses with small area glazing.

Advantages and disadvantages

The boiler does not require a chimney and is fireproof.
An electric boiler has many advantages:

• There is no open flame - this is the safest device in terms of fire. Even in the event of a short circuit, fire is excluded.
• The boiler is installed and configured independently. The settings can be changed at any time.
• The boiler does not need a chimney, ventilation, or thermal insulation. Install the device in any convenient place.
• Very high efficiency - up to 99%.
• Repair is not difficult: the design is simple, spare parts are always available.
• The cost is relatively low.

The disadvantages are also significant:

• Electricity is the most expensive type of fuel. Heating a house in this way will cost a considerable amount.
• Stable operation of the unit is ensured by current with a constant sufficient voltage. Interruptions and power surges will quickly damage the device.
• When the power goes out, the house gets cold very quickly.

To heat a private house up to 100 m2, a three-phase electric boiler is required. If such a decision is made during construction, the corresponding wiring is immediately included in the project. If later, the wiring will have to be changed.

EVAN WARMOS-RX 9.45 220

The described heating device can be connected to an electrical network of 220 Volts, its power is 9.45 kilowatts. An electric boiler is used as an individual heating source in apartments and private houses, premises serving the needs of small businesses. The price of the device is from 250 dollars.

Appearance of the electric boiler EVAN WARMOS-RX 9.45 220

The advantages of such a boiler include:

• Gradual heating of heating elements, which increases the service life of the device;
• Efficiency of the unit due to multi-stage power control;
• Stable operation of the boiler in the range from 180 to 260 Volts;
• High accuracy of coolant supply regulation;
• Mechanism to protect the boiler from overheating;
• The presence of a flow switch, with which the water circulation in the system is monitored;
• Special display for monitoring the operation of the boiler.

Please note: when purchasing EVAN boilers, consumers receive a free circulation pump and a special device - a thermometer, which is used to monitor the temperature of the heated water and pressure indicators in the system.

Costs of heating a house with electricity

It is difficult to accurately calculate costs in advance. Approximate calculations are made as follows:

• The induction boiler uses 99% of the energy consumed. A 12 kW unit consumes 12.1 kW. Another 60–150 W is taken by the circulation pump in the system. However, this value is the maximum. In fact, the boiler operates at full capacity quite rarely and on average during the heating season it consumes from 40 to 70% of the calculated energy, that is, 12 kW * 0.5 * 24 = 144 kW per day.
• The calculated value is multiplied by the current tariff. For example: 144*5.8 rubles*30 days=23241 rubles. per month.

To reduce consumption, it is recommended to install a multi-tariff meter. It differentiates consumption by time of day. By correctly adjusting the heating mode, you can save up to 14 thousand rubles per month.

Choosing an energy carrier based on ease of use

Comfortable operation of boiler equipment that supplies heat to water heating is an important factor, since any unnecessary hassle and inconvenience is your time and money. That is, total costs indirectly increase in accordance with how much effort is put into maintaining the operation of the system. In some cases, economical heating systems no longer seem so economical after the first season, and sometimes you want to pay extra money just not to deal with such problems.

Connecting an electric boiler to the heating system

Connection diagram for a single-phase low-power boiler
Installation is permitted anywhere, but the device must be protected from moisture and access to it must be limited. Therefore, it is not advisable to install a boiler in the bathroom. Heating element heaters can be installed in the kitchen and hallway - they are not afraid of moisture, but then the heating line will have to be laid into this room. In fact, the boiler almost always ends up in a separate technical room.

An electric boiler is installed to heat a private house of 100 square meters. m. according to the instructions. Follow some general recommendations:

• Most models are wall mounted. If the wall is lined with wood, it is recommended to insulate this area.
• The boiler must be freely accessible.
• A free area is left near the induction boiler, since a pump and expansion tank need to be secured next to it.
• The cables are placed above heating and sewer pipes so that in the event of a leak, the wires will not flood.
• The housing is connected to the grounding bus. If it is not there, construct a ground loop and lay it in the boiler room.
• The supply and return pipelines are secured into the corresponding nozzles and fixed.

The connection diagrams are different, depending on the type of device. If the boiler is not equipped with its own tank or pump, these devices are installed in the return line.

Models of electric boilers for heating a house of 100 square meters

Domestic model RusNIT with a power of 4 kW
The most economical devices have become popular in 2022:

• EVAN EPO 12 – compact electric floor-standing boiler for 100 sq. m. The heating elements are made of stainless steel, there is no outer casing, which ensures its modest size. You can connect an external remote control to control the unit.
• Bosch Tronic Heat 3000 12 is a high-quality German product with high efficiency - 99.7%. Compact size and stylish design are a nice bonus. Electronic control. The model is compatible with heated floors.
• ZOTA 12 Lux is a single-circuit boiler of Russian assembly. Models are equipped with chronothermostats - programmed for a specific operating mode.
• SAVITR Premium 12 is a double-circuit wall-mounted boiler from a Russian manufacturer. The controller is programmable, the security system is very well developed.

Any of the proposed models copes with heating a large area. The choice is determined by additional factors.

Electrode boilers

Manufacturers of electrode boilers claim that their heating units are more efficient than classic ones and provide benefits in energy consumption.

But, for example, a Galan electric boiler for heating a house of 100 square meters will “use” almost the same amount of electricity as the simplest EVAN for the same 100 square meters.

The difference between them will be so small that it is hardly worth specially preparing the coolant for this purpose and “dancing with a tambourine” when starting the same Galan.

In any case, read about electrode boilers on our website - it is useful for general development.