Is it profitable to heat a private house using an electric boiler?

The idea of ​​heating a house with electricity looks attractive, because it is the most comfortable type of heating. But the cost of energy is cause for concern. Therefore, the homeowner wants to assess in advance what costs the electric boiler will incur - whether it is profitable or not to use this device, and what difficulties there may be.

Features of heating a house with electricity

If you do not take into account operating costs, the choice in favor of such a heating system can only be characterized positively:

1. No chimney required.
2. There is no risk of fire (provided the connection rules are followed), explosion and gas poisoning.
3. No design or permission from government agencies is needed.
4. Full automation. Unlike the gas analogue, it is safe to start the device in the absence of occupants for a long time.
5. The heating output is regulated within a wide range without reducing efficiency.
6. The boiler is inexpensive.

But there are also negative points:

1. High electricity costs.
2. Low reliability. The overhead power grid is the most vulnerable part of the infrastructure.

After storms and hurricanes, populated areas are the first to remain without electricity. Therefore, it is risky to make do with an electric boiler alone; it is recommended to additionally connect at least a low-power solid fuel device to the heating system as a backup. The list of units is on the website.

Electrode boilers

These devices have a coolant conductor (electrolyte) between the body (cathode) and the internal element (anode). When the boiler is turned on, electrolyte ions begin to move between the cathode and anode. The particles change direction of movement 50 times per second, as a result of which the coolant quickly heats up. With the correct electrolyte composition, the boiler operates with high efficiency.

You can include such a device in the heating circuit yourself. But only a qualified specialist can connect it to the network. Despite the fact that the device can be embedded into the heating circuit in the most cramped conditions, it can hardly be called compact - a lot of space is needed to install the circulation pump, control unit, expansion tank, protective and control devices. There are restrictions on the length of the system; cannot be used in a DHW circuit.

Coterm model “Dachnik M” – for 8,990 and 10,999 rubles

“Dachnik M” is a flow-type device with 2 or 4 pipes. Designed for operation in closed CO circuits with natural or forced circulation of coolant. Among the advantages are the dimensions of the device and the declared operating efficiency.

The entire operating heating system with an electrode boiler is always energized. Therefore, plastic piping pipes and dielectric screens on steel or cast iron radiators are required. The list of disadvantages is complemented by the demands of such a boiler on the composition of the coolant.

This boiler is very compact. In the following photo you can see what the heating unit with this boiler looks like:

Please note: the contacts for grounding and zero, which are located next to each other on the device body, cannot be combined.
Because if the electrical panel is filled correctly, the RCD or automatic circuit breaker will operate the moment the “Dachnik” is turned on. Technical characteristics of the “Dachnik M” line

Video review from the owner about the “Dachnik M” boiler:

Galan – from 3,900 to 13,200 rubles

Galan electrode boilers are available in single- and three-phase models. Suitable only for closed heating systems as the main or auxiliary heat source.

The high rate of heating of the coolant and small dimensions distinguish repairable Galan boilers from existing heating equipment options of similar power. Constant monitoring of the condition of the coolant, a low level of safety, and the inability to fully integrate smart home systems do not in any way contribute to the formation of a comfortable level of operation.

The manufacturer claims that if the recommended slope of the piping pipes is observed and the heated area is up to 50 m², you can do without installing a circulation pump.
Although in practice, connecting a pump is much easier than designing a gravity-flow CO system. Technical characteristics of the Galan line

Video report on the use of the Galan boiler in the CO of a private house:

What you need to know before installing heating

The power of the line supplied from the power transmission line is limited. According to Decree No. 334 of the Government of the Russian Federation, which came into force in April 2009, energy networks are required to allocate 15 kW per household. At first glance, this is a lot: on average, an electric boiler of this power can heat a house with an area of ​​up to 150 square meters. m.

But there are other energy-intensive receivers in the home and on the property: a boiler, washing machine and dishwasher, oven, microwave, equipment in the workshop, etc. It is necessary to assess the level of consumption and calculate how much is left for heating.

If you apply to Rostekhnadzor, the limit may be raised. But in some regions the state of the networks does not allow this. There is a solution, but it can be expensive: sometimes a homeowner has to pay to replace a transformer at a substation in order to connect a powerful heater.

Deciding on the type of electric boiler

heating elements new

Construction of a standard heating element electric boiler.
The most common are models in which a heating element (tubular electric heater) or a combination of both – a block of heating elements – is used as a heating element. Models in the form of a flask with a low-power heating element barely exceed the diameter of the heating system line and cost from 3-4 thousand rubles. However, the most popular and successful models are those with a classic rectangular body, which are mini-boiler rooms. Already from the factory, they are usually equipped with all the necessary components of the heating system: an expansion tank, a safety valve, an automatic air vent, a circulation pump, a set of sensors and measuring instruments. It is enough to connect the supply and return lines to the boiler.

It is in heating electric boilers that modern automation is used, which allows you to regulate the temperature by degree, modulating the power of the heating element block. It is also worth paying attention to the possibility of finer settings, the presence of a room thermostat in the kit, the ability to connect external control, and the presence of a built-in programmer.

Perhaps the only significant drawback of heating electric boilers is the formation of scale on the heating elements themselves. This happens when hard, untreated water is used as a coolant. However, even if you do not use filters, water that is not replaced every season will only produce a slight sediment once, with virtually no effect on efficiency. Otherwise, after 3-6 heating seasons, the efficiency may drop to 90, 80 or even 70%. To heat water to the previous temperature through a layer of scale, the boiler will need more power and time.

A layer of scale due to the use of hard coolant.

In extreme cases, the cost of a block of heating elements is in the range of 1,000-3,000 rubles, and you can replace them yourself, without involving specialists. The resource of other components of heating element electric boilers is practically unlimited.

Electrode (ionic)

A visual principle of operation of an electrode heating boiler.
An electrode or a group of electrodes is used as a heating element in ion electric boilers. The principle of operation is to supply them with alternating current, due to which their polarity changes at a high frequency, water ions move to one electrode, then to the other and heat up as a result of friction. Low-power models use only one electrode located in the center, and a metal body is used as the second. More powerful models use blocks of 3 electrodes.

Although the efficiency of all modern electric boilers is 99% or more, electrode electric boilers, when compared with simple heating element models without expensive automation, are considered more economical. After all, scale does not accumulate on the electrodes and they do not lose their effectiveness even after 10 years. On the other hand, ionic models mostly have simple automation with a minimum of adjustments, usually in the form of a remote control. The boilers themselves are just a flask with small diameter electrodes. Despite its compact dimensions, all elements of the heating system such as an expansion tank, circulation pump, safety group, etc. will have to be purchased and installed separately.

Another serious disadvantage of electrode boilers is high grounding requirements, incompatibility with steel and cast iron radiators, and the need to use a special liquid - electrolyte - as a coolant.

Is it worth using electrode boilers for heating a private house?

Induction

Operating principle of induction electric boilers.
Induction water heating electric boilers use an induction coil, which, when voltage is applied to it, creates a magnetic field. A ferromagnetic core (metal pipe) is placed inside the coil, inside which the coolant flows. The magnetic field created by the voltage acts on the core through Foucault eddy currents, heating it. The core, in turn, transfers heat to the coolant. With such flow-through heating, scale does not form, and the coolant heats up 1.5-2 times faster; all boiler components have an almost unlimited resource.

However, the cost of induction boilers is 1.5-2 times higher. All necessary elements of the heating system, as is the case with most electrode boilers, must be purchased and installed separately. The listed advantages are justified only in the industrial sphere; in everyday life they are not significant, especially against the backdrop of the disadvantages and more advanced analogues. Therefore, installing an induction boiler in a private house can only be reasonable if you want to use antifreeze as a coolant. But today, new heating elements models are already beginning to appear, in which antifreeze is allowed.

Are induction electric boilers justified in the heating system of a private home?

Poll: what type of electric boilers did you choose?

Example of electricity consumption

For clarity, you can consider the organization of heating in a house with an area of ​​90 square meters. m, located in the Moscow region. There are electrical appliances with the following power consumption:

• water heater and washing machine: 1.5 kW each;
• 2 socket groups with 10 A circuit breakers, i.e. designed for a power of 220 × 10 = 2.2 kW each;
• internal and external lighting, supply and exhaust ventilation system with recuperator: total 1 kW.

The kitchen stove runs on bottled gas.

The total power consumption is 8.4 kW. 15 – 8.4 = 6.6 kW remains for heating.

The required rated power of the boiler corresponds to heat loss in the coldest week of the year + a reserve of 20%. To calculate them, a complex calculation is required, but a less accurate simplified version can be applied to a standard house: Q = S × K, where

Q – heat loss in the coldest week, W;

S – heated area, sq. m;

K – specific heat loss, W/sq. m.

Depending on the region, K is taken equal to a fixed value:

• southern regions: 60-80;
• central part of the country: 90-110;
• northern districts: 120-200.

According to the condition, the house is located in the Moscow region, we can assume that K = 100 W/sq. m.

Taking into account a reserve of 20%, the power of the heat generator in the coldest week will be:

W = 90 × 100 × 1.2 = 10,800 W = 10.8 kW.

Conclusion: to help the 6.6 kW electric boiler, it is necessary to install a solid fuel boiler - 4.2 kW. Or one combined one, running on wood and coal, but with heating elements in the heat exchanger.

TOP 10 best electric boilers for heating

In their competitive struggle, manufacturers produce many models in different price categories with different capabilities. That's why we decided to create a list of the most popular equipment.

1. STOUT SEB-0001-000007 7 kW.
2. EVAN EPO 6 6 kW.
3. EVAN EXPERT 7.5.
4. Vaillant eloBLOCK VE 14 14 kW.
5. Reko 7P 7 kW.
6. MORA-TOP Electra Comfort 08K 7.5 kW.
7. MORA-TOP Electra Light 7.5 kW.
8. RusNIT 205NM 5 kW.
9. Wattek ELTEK-2 (15) 15 kW.
10. Protherm Skat 21 KR 13 21 kW.

Below we will consider in detail each of the presented specimens.

STOUT SEB-0001-000007 7 kW

Russian electric boiler for heating a house up to 70 square meters. Weather-compensated automation and an outside temperature sensor are already installed, which, if configured correctly, gives an operating error of only 0.1°C.

Several operating modes are programmed: room, heating, weather-dependent. DHW, summer and cascade. Control is carried out on an electronic panel with a screen, buttons and indicators. The device is installed on the wall, and all communications are connected at the bottom. Internal parts are made of anti-corrosion steel.

Price: from 36,100 to 59,684 rubles.

STOUT SEB-0001-000007 7 kW

Advantages

• built-in expansion tank of 12 liters;
• a temperature sensor and weather-compensating equipment are installed;
• there is protection against overheating;
• The heating element block is made of stainless steel.

Flaws

• small heating area (70 m²).

I changed the boiler last fall and, on the advice of friends, took STOUT. The season has been excellent. There is no noise from it at all, especially compared to the previous boiler. Sometimes you even think that it doesn't work. It heats up the house in literally a few minutes and there is no need to monitor it, the automation itself will regulate everything, turn it on and off. Buy it, you won't regret it!

EVAN EPO 6.6 kW

The electric boiler for heating a private house with a small area, Evan, is made in Economy class. What made it budget-friendly was the designers’ decision to remove the body, leaving the working elements in sight. The built-in thermostat allows you to smoothly regulate the temperature in the coolant up to 85°C.

To accurately regulate the air temperature in the room, a remote control module is installed separately. As protection against overheating, a thermostat is installed, which stops the boiler when it reaches 95°C. The heating element is made of stainless steel.

Average price: from 8,275 to 12,550 rubles.

EVAN EPO 6.6 kW

Advantages

• it is possible to connect a remote control;
• connection of a hot water boiler is provided;
• overheating protection installed;
• Heating element made of anti-corrosion metal.

Flaws

• small heating area (64 m²).

I installed it in a country house and have no problems. An excellent boiler, not noisy, heats up wonderfully and quickly. It didn’t break during the season, but I found out in advance that spare parts were easy to find, which I was very happy about. I think it will last a long time. I'm happy with the purchase, the price is low, and the quality is five plus. I strongly recommend it to everyone!

EVAN EXPERT 7.5

The Evan electric boiler is a mini boiler room where you only need to set the desired temperature, and smart automation will do the rest for you. Heating is calculated taking into account street and room temperatures; all sensors are included in the kit.

The programming system allows you to set the temperature for each hour for a week in advance. The protection system has several stages, so the equipment is protected for all occasions. For hot water supply, you can connect a boiler. The autodiagnostic function is capable of checking the functionality of each control.

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Price range: from 41,180 to 62,410 rubles.

EVAN EXPERT 7.5

Advantages

• equipped with protection against freezing, against leaks, against turning on without water, against overheating;
• pressure safety valve installed;
• built-in self-diagnosis system;
• possibility of programming work;
• stainless heating element.

Flaws

• not found.

An excellent electric boiler for heating a private home. Absolutely safe with many features. There is no noise from it, you can sleep peacefully. The installation was simple, I connected everything myself without any problems. The power is adjustable from 1 to 9, everything is simple and convenient. For my house of 65 m² the power is enough. Excellent unit, I recommend it!

Vaillant eloBLOCK VE 14 14 kW

High-quality electric boiler for heating a house with an area of ​​more than 100 square meters. The modern design of this heating equipment and functionality will not leave any owner indifferent.

The boiler has the ability to connect up to 7 other boilers in a cascade manner. The operating power is smoothly regulated in two options: 1.2 kW and 2.3 kW. The pump is equipped with anti-blocking and anti-freeze protection. The control panel consists of a liquid crystal display, buttons and a rotary switch.

Price tag: from 50,350 to 77,649 rubles.

Vaillant eloBLOCK VE 14 14 kW

Advantages

• built-in 10-liter expansion tank and mechanical pressure gauge;
• a self-diagnosis system has been installed;
• there is protection against overheating and freezing;
• possibility of connecting external control.

Flaws

• not found.

I needed to install heating in my new house and thought for a long time about which boiler to buy. I read a lot of information and made a choice. I settled on Vaillant. This company does not have any bad reviews of electric boilers for heating private homes and people speak positively about them. Therefore the problem was solved. It has already worked through the winter, does not make any noise, heats perfectly, and consumes little electricity. I recommend!

Reco 7P 7 kW

Wall-mounted single-circuit electric boiler for space heating. The combination of intuitive controls and the quality of materials used to manufacture the working units determines the reliability and durability of the equipment, and Russian production ensures the availability of repair parts.

The boiler has several heating elements installed, so the power can be adjusted in three stages, and in any mode the equipment operates quietly. It is possible to connect a heated floor system. Programming of work is allowed seven days in advance. Energy consumption is monitored by an electricity consumption meter.

Prices: from 16,930 to 22,000 rubles.

Reco 7P 7 kW

Advantages

• possibility of connecting a heated floor;
• built-in heating elements made of stainless steel;
• there is a programmer for the week ahead;
• Auto diagnostics and thermometer available;
• protection against freezing and overheating is provided.

Flaws

• heats only up to 70 m².

In my opinion, Reko is the best budget electric heating boiler. It's enough for my small house. Connects to a 220V home network, wall installation, everything is simple and convenient. For such functionality, the price of an electric boiler for heating a private home is simply ridiculous. Buy it and you won’t regret it, great product!

MORA-TOP Electra Comfort 08K 7.5 kW

The wall-mounted boiler with electronic control is intended for use in heating systems with forced water circulation and preparation of hot water supply using an indirect storage water heater.

The heating process is controlled by a unit with error-free, smooth electronic temperature control, which ensures economical operation of the boiler and the entire heating system. Equipped with automatic power control and multi-stage protection system. Has a high efficiency of 99%.

Cost: from 44,183 to 51,040 rubles.

MORA-TOP Electra Comfort 08K 7.5 kW

Advantages

• protective functions: against freezing, against overheating of the boiler and floor, against loss of pressure in the coolant and anti-blocking of the pump;
• possibility of control from a mobile phone;
• auto diagnostic system;
• Possibility of connecting underfloor heating.

Flaws

• not detected.

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A reliable and easy-to-use electric boiler for heating your home with low power consumption thanks to automatic adjustment. Protected from all misfortunes, quiet, takes up little space. Excellent smart car, especially convenient to control from your phone! The boiler is definitely worth the money, I am absolutely satisfied with the purchase.

MORA-TOP Electra Light 7.5 kW

A compact single-circuit boiler is installed on the wall and connected to heat-conducting systems with forced circulation. Hot water supply in the room is provided by the joint operation of the boiler and storage boiler (not included).

The automation is controlled both on the boiler itself and using a mobile application on the phone. In addition to the display and buttons, the control panel contains an analog pressure gauge and operation indication. For more precise temperature control, you can connect a room thermostat to the equipment.

Approximate cost: from 33,138 to 36,977 rubles.

MORA-TOP Electra Light 7.5 kW

Advantages

• a protection system against overheating, freezing, and pump blocking is installed;
• built-in self-diagnosis with error code displayed on the display;
• Can be controlled from a mobile phone;
• connection of a room thermostat is provided.

Flaws

• not found.

I installed such a boiler in a country house. Due to smooth electronic adjustment, energy is significantly saved. It features overload and pressure loss protection and automatic air release. These Czech electric boilers for home heating are famous for their quality, so I think they will last a long time.

RusNIT 205NM 5 kW

The automated heating boiler model RusNIT-205-NM is designed to operate from the electrical network. Such a unit will help to heat the premises of a private household or country cottages with an area of ​​up to 50 square meters.

The model is equipped with a circulation pump and a built-in hydraulic accumulator, which significantly increases operating efficiency and makes it even more stable. The temperature sensor prevents the equipment from heating above 90°C, thereby extending its service life. The heat exchanger material here is stainless steel.

Cost range: from 23,915 to 27,892 rubles.

RusNIT 205NM 5 kW

Advantages

• reliable stainless heat exchanger;
• overheating protection installed;
• The kit includes a 10-liter expansion tank and a German-made circulation pump.

Flaws

• allows you to heat only 50 m² of area.

An excellent inexpensive boiler for small spaces, I installed it in my store. For some reason I couldn’t find any reviews about it even on the Internet, but I decided to buy it. For the same price, a pump and an expansion tank are included with the boiler - a significant saving. It has only been working for two months, but so far there are no complaints. I am satisfied with the purchase.

Wattek ELTEK-2 (15) 15 kW

Reliable heating unit with European components. Outdoor and room temperature sensors are supplied with the boiler. Stainless steel heating elements with increased wall thickness are installed, which indicates their durability.

Energy consumption meter and daily or weekly programming will allow you to optimize the operation of the device in order to save electricity. The delivery set also includes a pump and expansion tank. Control is possible remotely from a mobile phone.

Approximate cost: from 42,378 to 45,008 rubles.

Wattek ELTEK-2 (15) 15 kW

Advantages

• a pump and a 12-liter expansion tank are included in the delivery package;
• ability to control from a smartphone;
• the walls of the heating elements are increased to 0.8 mm;
• protected from overheating and freezing.

Flaws

• not found.

High-quality assembly, I have not yet noticed any problems with operation, ease of adjustment and heating settings. He connected it to the heating system himself, in this regard everything was simple with him. The boiler has been in use for a couple of months. He performs his direct duties perfectly and this is the main thing. I don’t even know what to complain about here. He gets his money's worth one hundred percent.

Protherm Skat 21 KR 13 21 kW

Wall-mounted electric boiler with intelligent soft switching of operating power, which saves energy and extends the service life of heating elements. A cascade connection to other boilers is provided as main or backup equipment.

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Performance sensors in conjunction with a self-diagnosis system will tell you about malfunctions. Air is removed from the heating system through a built-in automatic valve. A circulation pump and an eight-liter expansion tank are already built into the equipment.

Average price tag: from 61,500 to 62,500 rubles.

Protherm Skat 21 KR 13 21 kW

Advantages

• the circulation pump and expansion tank are already built-in;
• there is a system for testing operation and self-diagnosis;
• it is possible to connect a heated floor
• protection against overheating and freezing is installed.

Flaws

• not detected.

This boiler is easy to install and does not require any supernatural skills. To monitor the operation of the boiler, there is a display on the front panel. Comfortable and modern. There is a pressure sensor, it monitors the pressure independently and if it drops, it reacts immediately. The device is excellent and fully justifies its price.

Which electric boilers are most often used to heat a private home?

There are 4 varieties:

• heating elements;
• electrode;
• induction;
• heat pumps.

The first ones are the most common. Their advantages:

• affordable price;
• low requirements for the coolant: it only needs to be desalted once before the first use;
• simple and inexpensive repairs;
• soft start (prevents power surges in the network).

Electrode boilers are cheaper than heating elements and are simpler in design. But the user has to prepare the coolant according to the recipe. At the same time, its chemical composition is constantly changing, so every 1.5 months it is necessary to pour new liquid into the circuit. This makes operation difficult.

Induction boilers, on the contrary, are able to work with any coolant, but their price is 4 times higher than that of heating elements.

Both of the latter types have a common drawback: their design does not provide for a soft start, so when switched on, voltage surges occur in the network.

If funds allow, it is advisable to purchase a boiler that operates on the principle of a heat pump. It is beneficial to use it. For every kilowatt of electricity consumed, the device produces up to 5 kW of heat. But the system will require a lot of money: in addition to purchasing an expensive device, you will have to pay for the construction of an extensive external heat exchanger (a long circuit of pipes in the ground).

How to choose an electric boiler for heating

Buying an electric boiler for heating is, in principle, quite easy, but buying a high-quality boiler that will serve you for many years without breakdowns is much more difficult.

That's why we want to share useful tips for choosing this equipment.

1. First of all, decide on the location of the heating device, measure it, they all differ in dimensions and it may turn out that your purchase does not fit into the space allocated for it.
2. Boiler power. The parameter directly depends on the area of ​​the room that needs to be heated. One square meter equals one kilowatt of power under ideal conditions and minimal heat loss in the room. In case of large heat loss, approximately 30% of the thermal power of the equipment is added to the standard calculation.
3. There are single-circuit and double-circuit devices. The first ones are intended only for heating, and in order to also receive hot water for household needs, you will have to additionally install a storage water heater. In double-circuit models, the boiler is already built into the design.
4. Based on the method of heating the coolant, boilers are divided into electrode, induction and heating elements. The simplest and cheapest is electrode, but here you should pay special attention to the power supply and be sure to provide grounding. As heating increases, energy consumption also increases. Induction heats up quickly, has a long service life, does not form scale and is absolutely safe, but the price is very high and is used only in a closed system with forced circulation. Heating elements are the best option; they are affordable, simple and safe to use. Over time, the heating element may need to be replaced, but nothing lasts forever.
5. Pay attention to models with a self-diagnostic system. It will help you navigate in case of any malfunction and quickly eliminate the cause.
6. All kinds of protection systems will also not be superfluous. Cases are different and it is better to protect yourself and your home.
7. The presence of additional pleasant functions, for example, programming or control using a smartphone is not necessary, but they add comfort and convenience to the operation of the equipment.

Electricity costs for heating a house

The boiler reaches its rated power mode only during the coldest five-day period of the year. The rest of the time it operates with reduced heating output. On average it is:

• in the winter months (December, January and February): 50% of nominal;
• in November and March: 30%;
• in October and April: 15%.

For example, a 10 kW boiler will consume during the heating season:

1. During the winter months: 10 × 0.5 × 24 hours × 90 days = 10,800 kWh.
2. For November and March: 10 × 0.3 × 24 × 61 = 4,392 kWh.
3. For October and April: 10 × 0.15 × 24 × 61 = 2,196 kWh.

Total: 10,800 + 4,392 + 2,196 = 17,388 kWh.

In 2021, in the Moscow region, the tariff for houses with electric stoves and heating corresponds to 3.89 rubles/kWh. This means that the costs for the season will be 17,388 × 3.89 = 67,639.32 rubles.

Rating of TOP 7 best models

What affects electricity consumption

All boilers convert the energy used into heat in a 1:1 ratio. With 100% efficiency, negligible losses in wires and connections are neglected. The exception is heat pumps, but they are still rarely used.

Thus, there are only 2 ways to reduce electricity consumption:

1. Reduce heat loss. To do this, the home is covered with mineral wool or polystyrene foam, and the cracks are sealed.
2. Optimize the operation of the boiler in order to eliminate excessive consumption of energy resources.

The second problem is also solved in 2 ways:

1. Using weather-sensitive automation. Such a system promptly warns the boiler about the onset of warming, and it manages to reduce power without overheating the room.
2. Programming. A model with this function, according to user settings, reduces heating output when residents are at work or sleeping. The rest of the time the device returns to normal mode.

For inexpensive heaters, the first option is not suitable. They do not have the function of connecting weather-compensated automation. Then it is recommended to install at least a remote thermostat: it maintains the room temperature at a given level.

It is possible, without reducing consumption, to reduce financial costs. They are switching to differentiated metering of electricity consumption with a big discount at night (RUB 1.68 instead of RUB 3.89). The heating system is equipped with a heat accumulator - a large capacity in which the boiler raises the temperature of the working environment to +98˚C within a grace period. During the day, boiling water is gradually supplied from it through the mixing unit into the circuit as needed; the heater does not work at this time.

In this case, you will have to pay 17,388 × 1.68 = 29,212 rubles for the season. But there is a nuance: the rated power of the boiler should be twice the design power, because at night it works both for heating and for “charging” the heat accumulator. For the example given, a 20 kW unit will be required.

Conclusion

No matter how technologically advanced the methods of heating the coolant are, in the case of series of expensive electrical equipment, they cannot be considered profitable as long as the cost of electricity remains the highest among energy carriers in the Russian Federation.

The real solution to the problem of comfortable heating of housing where there is no gas is boilers with heating elements. Today, models are offered to suit any consumer needs - some are simple, some are more comfortable. With a good ratio of the number of functions to the number of models, the eloBLOCK VE line from Vaillant . And thanks to the company’s developed service system, these boilers will be acceptable in homes for temporary and permanent residence. In any region of Russia.

Other heat sources

To assess how costly heating with electricity is, it is necessary to compare it with other energy sources. It should be taken into account that the efficiency of fuel boilers does not reach a hundred: for gas boilers it is about 93%, for wood and coal boilers it is about 85%.

Below is the cost per 1 kWh for different types of fuel:

1. Natural gas: 0.68 rubles, taking into account efficiency – 0.75 rubles.
2. Oak firewood: 1.09 and 1.36 rubles, respectively.
3. Coal: 1.33 and 1.57 rubles.
4. Wood pellets: 1.51 and 1.78 rubles.
5. Liquefied gas: 1.99 and 2.13 rubles.
6. Diesel fuel: 3.51 and 3.90 rubles.

In each case, heating costs for the season will be (for 17,388 kWh):

• natural gas: RUB 13,041;
• oak firewood: RUB 23,648;
• coal: RUB 27,300;
• wood pellets: RUB 30,950;
• liquefied gas: RUB 37,036;
• diesel fuel: RUB 67,813.

The average price level is given.

How to choose and what to pay attention to?

Electric boilers for home heating 220 V are divided into three classes:

1. Economy _ Such units are equipped with a hydraulic unit, which includes a block of heating elements and a water tank. The control system is quite simple - automation based on an electromechanical thermostat. The design is the simplest, and, of course, the price is low.
2. Standard . Such products have a multi-stage protection system, as well as a circulation pump. Such boilers are more stylish and fit well into the interior of the house. However, the price for a 220 V product will be higher.
3. Premium . The most modern, but expensive devices that have an electronic temperature control system, several operating modes, and a protection system. The device can be connected to centralized climate control networks. Accordingly, the design of the electric boiler is stylish and original.

In addition to the above, when purchasing an electric boiler for heating 220 V, you must take into account:

• power level - for heating 10 sq.m. approximately 1 kW of electricity will be required;
• number of circuits - a single-circuit model is suitable only for heating a house, a double-circuit model is also suitable for heating water;
• automated system - such units operate in a more economical mode and with a high level of efficiency.