No matter how much they talk about the unprofitability of heating housing with a system with an electric boiler, such equipment is in demand. In some cases there is no alternative. In other options, it is possible to heat with a solid fuel unit, but not everyone will like it. Therefore, the installation of an electric boiler is relevant both for the purpose of heating a private house and an apartment in the city. Many are interested in how to install an electric boiler, what are the requirements, whether permission is needed for this, etc. Let's clarify.
Preparatory activities
Unlike gas equipment, electric boilers are installed less troublesome both in terms of installation and in terms of collecting permits. If the heated area is small (up to 100 m2), an electric boiler with a capacity of up to 10-12 kW is sufficient for heating it. As a rule, such units are powered by a 220 V household power supply and consume a single-phase electric current. In this case, no agreement is needed. One has only to find out from the power engineers whether the power of the transformer in your area is enough to provide the electric boiler with energy.
More powerful units require a three-phase connection (380 V). If there are no three phases, it will need to be done (carried out). In this case, appropriate approvals, permits and material costs for the performance of certain types of work will be required.
It is advisable to replace the three-mode meter at the same time so that the operation of electric water heating equipment is as economical as possible.
- Almost all boilers powered by electricity must be installed outside of residential premises. This may not necessarily be a boiler room, but a technical room with limited access to households. In a residential area, it is allowed to install factory-made heating elements of small (up to 12-16 kW) power.
- The strapping elements must not be allowed to represent a load on the design of the electrical appliance. Therefore, the hot pipe and return pipe should be rigidly fixed to the wall.
- It is necessary to avoid the situation when the cables supplying the boiler are located under water or heating communications. If it does not work out otherwise, the wires should be placed in cable channels or protected by special boxes (both are better).
- It is necessary to connect the unit to the power supply directly from the switchboard using a cable with conductors of the section recommended by the manufacturer.
- Be sure to ground the electrical appliance for heating, whatever its type or power. This will prevent the risk of electric shock.
How to install an electric boiler
Modern heating units powered by electricity, according to the principle of converting the latter into thermal energy, are divided into three main types:
- with heating element;
- induction;
- ionic (electrolysis).
Installation of devices of the last two types is best left to specialists. Firstly, the products are very expensive (it would be a pity to damage anything during installation). Secondly, you should know exactly the connection and piping schemes for such electric boilers, which have many nuances.
With factory-made (there are also home-made) boilers that are equipped with heating elements, everything is much simpler both in terms of installation and connection. Therefore, we will consider these issues using the example of such products. According to the installation method, such electrical appliances are:
- hinged;
- floor.
The first products are usually compact, lightweight, low-power. Depending on the material of its manufacture, they are attached to the wall with powerful dowels or special self-tapping screws. When installing, pay attention to the fact that the product is located according to the vertical and horizontal levels. Often such electrical appliances are placed in pre-prepared niches. The installation height must be such that the bottom of the boiler is at least 1.5 m from the floor surface.
Floor products are more massive. They are usually equipped with special stands (legs) that allow you to adjust the position in space. The base at the installation site must be solid, waterproof, and non-conductive. A tiled floor is ideal for this purpose. Before installing the floor electric boiler, it is advisable to bring the necessary communications and lay the electrical cable.
Connection and piping of the electric boiler
Modern factory-made electric heat generators are a mini-boiler room. That is, they are equipped not only with automation regulating the operation, but also with a circulation pump, as well as a neck for filling the coolant. In some models, a closed expansion tank is also built in. Therefore, the piping scheme for such a boiler is quite simple. To turn on the electric boiler in the heating system, you will need:
- Ball Valves;
- coarse filter (mud filter);
- expansion tank (if the unit is not equipped with it);
- check valve.
The hot pipe of the heating system is connected to the corresponding branch pipe of the electrical appliance through a ball valve and an "American". The return pipe is attached to the electric boiler in exactly the same way, but additional elements are installed on it according to this scheme. If you take it along the way to the boiler, you need to sequentially cut it into the return pipe:
- water filter (mud collector);
- expansion tank (if needed);
- check valve;
- branch pipe for draining the coolant with a stopcock.
It is advisable to put a tap in front of the sump in order to be able to remove the filter for cleaning.
This is how a wiring diagram for electric heating boilers is made and a modern factory electric boiler equipped with a heating element is connected to the heating system. With boilers of other types (electrolysis and induction), everything is more complicated. There, the scheme should additionally include special elements necessary in tying just such units. Therefore, without the presence of special knowledge and skills, it is better not to undertake this business.
Connecting the boiler to the power supply
An electric boiler of even low power carries a large load on the household electrical network. Therefore, an individual cable of a certain section from the electrical panel is led to it. If the boiler is single-phase, with certain skills, the device can be connected to electricity on its own. With a three-phase unit, everything is much more complicated, so you can’t do without the help of an electrician.
Even when connecting an electric boiler designed for 220 V, you need to follow certain rules. The diagram must include:
- individual automatic switch (machine) corresponding to the capacity;
- RCD for emergency shutdown.
You can include one of the above devices in the power supply circuit of the heating device. But, as practice shows, an extra degree of protection, when it comes to electricity, is never superfluous.
The electrical cable supplying the electric boiler with energy must be laid in such a way that it is constantly accessible. That is, it should not be bricked into the wall. It is better to lay the wire on top of the finishing layer of the wall in the cable channel and close it with a removable decorative box. It is impossible to allow wire connections by twisting, possible contacts of copper with aluminum should be made using special docking devices.
Installation and connection of the electric boiler to the heating system and power supply can be done independently only when there is confidence in one's abilities. If you are in doubt about this, it is better to entrust the work to specialists who know their business. After all, electricity, even domestic, sometimes does not forgive mistakes.
The use of electricity for heating a private house is gaining momentum. This is due, first of all, to the impossibility or high cost of installing a gas branch to a particular object. But even without this, such heating has enough advantages.
The following describes the principle of operation of the unit, the calculation of the load on certain territories, and the direct installation of an electric heating boiler with your own hands. The work is simple, but requires the exact execution of each step of the instruction.
Types of electric boilers
The range offered to the consumer is quite rich. Externally, the devices are very attractive - wall, floor. They can be powered from the network or require a certain power load.
Single-circuit or double-circuit - the latter are suitable for generating hot water. However, it is not advisable to admire only the device and appearance - it is important to determine the economic benefit of each unit, it is determined by the method of heating the carrier. So:
Which one to buy? The choice is up to the owner. However, one should not proceed only from the cost of the unit - the purchase of a promising expensive model may give great monetary savings in the future.
Requirements for the installation of electric boilers
The regulation is less strict on the installation of heating units on electricity, however, this does not mean that the work can be treated negligently - an installation scheme for an electric heating boiler and a permit from Energonadzor are required if the system is the only one in the house. Further:
- Defects in the wiring are necessarily detected. An electric boiler, according to its power, requires a high-quality power cable and grounding. If defects are found, the wiring is changed.
- The place for installing the boiler is chosen carefully. It should not be less than 4 m² in area, damp or with periodic moisture, be located next to the windows. Usually a passage corridor is suitable - a wall or floor.
- Depending on the location, the floors or wall should not be defective. This applies to the manifestations of fungus or mold, which signal moisture.
- The socket and junction box must be in a single copy and only for installation. Ideally, if the owners provide a separate input specifically for the boiler, then short circuits or drops in the network are excluded.
Even the installation of an electric mini-heating boiler in the garage should only be done by an experienced electrician. Lack of knowledge will lead to misfortune.
Boiler power calculation
To understand which unit will be the most acceptable in the house, you should calculate its power using the following formula: F \u003d S * F1 / 10, where F is the boiler power, S is the area of \u200b\u200bthe room, F1 is the design parameter of the unit per 10 m². You should focus on the found number. In addition, the following factors should be taken into account:
- Type of thermal insulation.
- Number of rooms.
- The area of window openings and doors - through them the most noticeable heat loss.
- Additional premises - attic and basement. Are they insulated, do they have ventilation and so on.
You can calculate and order a regime card with the help of professionals who will not only suggest the most acceptable solution, but also describe in detail the parameters for optimizing energy costs.
Self-assembly of a wall-mounted electric boiler
When you have decided on the model of the unit and chosen a place for installation, you can begin installation. Naturally, with certain knowledge. So, you will need the following tools:
When the system is installed, each heating unit is checked separately - for leaks, the piping and the boiler itself, for the correct connection of cables - the electrical panel. After pressure testing, the boiler can be put into operation at the minimum mode, adding the load gradually.
Electric boiler Evan
Most recently, a domestic manufacturer offered its consumer a new product - the Evan electric boiler. The company exists for a long time and constantly upgrades its units, resulting in this heating system. The series of boilers produced under this brand can be conditionally divided into the following:
- Economy
- Standard.
- Comfort.
- Professional.
- Suite.
But in general, even budget categories are not inferior in quality to VIP products. A feature of each unit is manual assembly, which eliminates stamped defects, which are sinned by in-line production.
More advantages:
A big plus of Evan products is the affordable prices for economy and standard class boilers. If the owners do not have luxurious mansions with territories exceeding 500 m², then any of the units will do just fine.
The owners should decide on the installation of a heating unit after they have made the necessary economic calculations in terms of budget costs in the future. The high-quality operation of an electric boiler depends not only on the popularity of the manufacturer, but also on the conditions of a residential facility for productive work.
The electric boiler has become an indispensable assistant for residents of an apartment and a private house. Usually, when buying in a store, you are already offered to connect the boiler for money. Everywhere the amounts are different, but every owner who spends 20 minutes reading this article will be able to do this operation. You can install an electric boiler for heating using the schemes that are present in our material. And one more mandatory requirement is to read the instructions for the electric boiler, since the main design does not change, but little things can affect the operation of the unit in the future.
Which boiler to choose?
On the market you can find different types of boilers for heating an apartment or a private house. In order not to get confused, you need to have a minimum of knowledge about each of them:
Electrode boilers. The heating of the liquid occurs due to the alternating current that passes through it. This type of electric boiler is considered the most convenient. The efficiency of the electric boiler is not lower than 98% - this is what the manufacturers say.
IMPORTANT: distilled water is not suitable as a heating medium.
Compounds are included with the unit, their task is to increase the electrical conductivity of the liquid.
Heating elements boilers- the most common devices, heating elements in them perform a heating function. The units have an efficiency of at least 93%. Despite the low cost, heating element boilers have a serious drawback: if the water is too hard, scale appears on the heating elements, as a result, the boiler power drops.
This is what a standard heating element looks like.
Induction boilers- durable and economical units that have an efficiency of 98%. The design is similar to a transformer. Minus - they can not give out high power for heating.
Boiler connection
The scheme for connecting the unit to the heating system is quite simple, it consists of the following elements:
- a filter that works in tandem with a circulation pump;
- temperature sensors installed on the pipeline;
- expansion tank;
- Radiator;
- drain and shutoff valves.
All modern boilers come with automatic fuses, which, during electrical overloads, prevent the device from failing. The temperature control of the coolant is also controlled by automation. Fluctuations are fixed by sensors, and if necessary, the system brings them to normal parameters. 
It is worth buying a model of an electric boiler with a stabilizer for your home, as these devices “painfully” endure fluctuations in the network. If the boiler is purchased without a stabilizer, then you can always buy this element separately. Do not forget to study the instructions, which are individually for each electric boiler. After that, you can start connecting the unit to the heating system.
The unit can be installed in both closed and open heating systems. In the first case, the installation of pressure gauges is a mandatory item - there is a membrane tank in it. In the open version, a pressure gauge is not required at all. If a temperature sensor is not installed at home, then the unit will work more economically. Some models come without a coolant sensor, in which case you will have to buy it separately.
Installation Features
During the installation of the boiler structure, it is necessary to install the circulation pump - this step contributes to a more productive and economical operation of the unit. Another important point is the switchboard, especially for apartment residents: the boiler needs a separate line. Professionals also recommend installing an RCD. Don't forget to ground.
The equipment should come with a box with C16 circuit breakers, which are mounted at home next to the unit. As for the cable, a five-core cable (L1, L2, L3, PE, N) is suitable for a three-phase cable, and a three-core cable (PE, L, N) is suitable for a single-phase one. 
Another important point is the calculation of power. The unit should not work at home at maximum power, so the electric boiler must be bought with a power reserve. The indicator depends on the heating area. Calculate the power according to the table:
Useful schemes
Safety in the matter of connecting an electric boiler at home should come first. Run only if these conditions are met:
- There are no leaks, all nodes in the system are checked.
- The connection was made according to the scheme.
- The pressure indicator corresponds to the instructions (the pressure rate is indicated there).
- The electric boiler system is completely filled with water.
IMPORTANT: the first start-up of the equipment takes place at a minimum temperature. If there is no damage and the nodes are warmed up, then you can increase the temperature. As you can see, connecting the system is quite simple. The main thing is to fully follow the installation instructions for the equipment.
Positive and negative sides of the boiler
pros. In a private house, due to the operation of the electric unit, the temperature is always the same. Modern electric boilers operate in automatic mode, so the owners do not have to constantly adjust it. Especially the boiler is beneficial for the 2-tariff payment system.
Concerning cons, then they should first of all include a tangible increase in payment for electricity. If there is no electricity, then it is necessary to buy a gasoline generator, since it will not be possible to cope with an ordinary “dynamo” - an electric boiler is demanding on power.
Boiler selection
Calculate the area of your home. The equipment is 1- or 3-phase. You need to choose from the calculation of power and heating zone. It is better to choose 3-phase equipment, as it produces more power and does not load the power grid as much when compared with a 1-phase boiler.
If the connection of a suburban area to a centralized gas supply is impossible for any reason and is at least not planned in the coming years, then heating from an electric boiler is often used to heat private houses - the solution has a number of advantages, although it is not without drawbacks.
In order for the use of the device to be effective, it is important to correctly select the electrical equipment and the circuit diagram. We offer to understand the design and functional features of different types of electric boilers, as well as to evaluate the features of various options for connecting units to the heating system.
For those who plan to organize home heating from an electrical appliance, it will be useful to know how to use a dual tariff in order to reduce electricity bills.
The electric boiler converts electrical energy into thermal energy and, depending on the design features, it can be:
- heating elements;
- electrode;
- induction.
Regardless of the type, modern models are equipped with which you can adjust the power of the device and the degree of heating of the coolant.
Usually it is also possible to receive information from an external sensor in order to control the temperature of the air mass in a particular room.
Heating element device
Install inside a container intended for water. They can be made in the form of tubes or plates. To regulate the degree of heating, the heaters are switched on alternately.
Water enters the tank, heats up, then is transferred to the circuit. As it cools or heats up, individual heating elements turn on or off. The movement of the coolant is controlled by the built-in circulation pump.
Depending on the size and type of heating elements, electric boilers are wall-mounted or floor-standing. It is necessary to choose a place for installing the device so that it is convenient to service it.
To do this, you can use special formulas to perform calculations manually. It is convenient to use calculators available on specialized sites. After entering information about the area, scheme and other characteristics of the TS, the program will provide the necessary information.
Usually the estimated length of the pipe is slightly increased in order to have a small margin. If it seems too short, you just have to buy a new one. For a warm floor, a filtration system is needed so that the coolant is clean enough.
Electric boiler and double tariff
One of the significant reasons for using an electric boiler for heating is the possibility of using double billing for the use of electricity. Reduced fees at night can significantly reduce costs.
A two-tariff meter makes it possible to pay for electricity used at night much less than during the day and saves owners of electric boilers
You will need to purchase and install a two-tariff meter. It is worth noting that double-circuit models of equipment with a heating element supply hot water to a collapsible faucet with a characteristic noticeable delay. As a result, part of the heat is lost, which reduces the effect of saving electricity.
It makes sense to supplement such a design with an external heat accumulator capable of maintaining a high temperature of heated water for a long time. Such a device is quite effective when using a two-tariff meter.
The water is heated at night, kept warm and used during the day, the consumption of electricity during the day is reduced, as are the bills for the electricity used.
Conclusions and useful video on the topic
The order of installation of the electric boiler:
Although the use of an electric boiler as a heating device is considered too expensive, its advantages are obvious. Such devices are safe for people and the environment, operate automatically, are affordable and easy to use.
If the type of heating system is chosen correctly, and all its components are professionally installed, the boiler will work for a long time without any extra costs.
Do you have experience using an electric boiler for home heating? Or want to ask questions on the topic? Please comment on the post and participate in the discussions. The feedback block is located below.
Electric boilers for heating a private house are not often used, this is due to high electricity tariffs. Nevertheless, they have a lot of advantages, and in some cases the installation of an electric boiler is justified and profitable.
Gas is not available to everyone: some settlements are located too far from the highway, and sometimes installing a gas boiler is not at all appropriate. For example, for a country house that is heated several times during the winter, it makes no sense to purchase an expensive set of gas equipment.
They also have a number of disadvantages: it is necessary to harvest and store fuel, and most solid fuel units cannot operate for a long time, more than 4-5 hours, on one load of fuel. In addition, they are inertial and do not allow precise temperature control. In this case, the electric boiler is able to solve the heating problem quickly, reliably and at no extra cost.
Advantages of electric boilers for a private house:
- easy to install, connect and maintain;
- have a high level of automation;
- allow you to accurately set the desired temperature;
- work silently;
- no need to connect to a chimney;
- do not require a separate room, most household models are mounted on the wall with their own hands.
Flaws:
- require connection to the shield with a separate cable;
- boilers with a power of more than 9 kW are produced only for a three-phase voltage of 380 V;
- due to high electricity tariffs, heating costs several times more.
Kinds
Electric boilers differ in the way they convert electricity consumed from the network into heat. The principle of their operation can be based both on direct heating and on indirect heating using physical and chemical processes.
Electric boilers are:
- TENovye - with a tank in which tubular heaters are built;
- induction, using electromagnetic induction to heat the coolant;
- electrode - their work is based on electrolysis.
Heating elements
The popular, time-tested design of heating element boilers is extremely simple: several heaters are mounted in the tank, allowing you to turn on all or part of them, depending on the power selected by the mode.
The heaters are a spiral wound of high resistivity wire - nichrome, kanthal, fechral, placed in a ceramic tube. Heating up when connected to the network, the spiral gives off heat to the ceramic tube, and that, in turn, heats the water entering the tank.
Also, the boiler is equipped with a control unit with a panel on which you can set the desired mode. Modern models are equipped with sensors that monitor operation parameters and turn off the unit in case of emergency.
Advantages of models with heating elements:
- large power range;
- the possibility of using any liquid as a coolant - water, oil or antifreeze;
- simple design, simple repairs if necessary, which can be done with your own hands even without professional skills;
- boilers with heating elements are the most economical to buy, they are distinguished by a low price;
- dual-circuit models allow you to connect a hot water circuit.
Flaws:
- Heating elements are prone to scale formation, because of this, over time, the efficiency and power of the unit decreases;
- large dimensions.
induction
Their action is based on the phenomenon of eddy currents that can heat the core placed in their field. The boiler is a cylindrical metal case, where the inductance coil is placed. Inside the coil is a core of conductive material. When an alternating current passes through the coil, a magnetic field arises around it, generating eddy currents in the core.
Such heaters have long been used in industry, where they operate at an industrial frequency of 50 Hz. At the same time, the coil and the installation itself hum perceptibly and vibrate with a frequency of the same 50 Hz.
To avoid noise, induction-type household boilers operate at an increased frequency in the range of 10-100 MHz, so they are silent. Vibration is preserved in them, but at a high frequency it is not noticeable and even useful - induction-type boilers are not afraid of scale, due to constant vibration, particles do not settle on the heater elements.
Advantages of induction boilers:
- small dimensions;
- induction models are not subject to scale formation;
- the appearance of leaks is excluded - there are no detachable connections inside the tank;
- any coolant can be used, including low-quality water with a large amount of calcium, magnesium and iron salts;
- simple do-it-yourself connection;
- long service life without breakdowns and repairs.
Flaws:
- in the absence of electromagnetic protection of the case, the inductor can be a source of harmful magnetic radiation, so you need to carefully consider the choice of the manufacturer;
- models of similar power are much more expensive than electric heaters.
Manufacturers claim that induction models are more economical, but practice shows that, with equal power, their heat transfer is approximately the same as that of heating elements, and they are economical only in the long service life.
If desired, you can assemble an induction-type boiler from a wire coil and a polypropylene pipe. Homemade heaters are in no way inferior in power, but their appearance is less aesthetic.
Boilers of electrode type
Water boilers of the electrode type heat the coolant by electrolysis. Inside the apparatus on different sides of the tank are steel electrodes. When a current is connected, a potential with a variable sign is formed on them and the movement of particles dissolved in water begins - ions. The polarity of the electrodes changes with a network frequency of 50 Hz, that is, 50 times per second, which causes a rapid heating of the coolant.
In order for the process to proceed with a given intensity, it is necessary to maintain a constant density of the electrolyte, which is the coolant, namely, a weak aqueous salt solution.
The instruction for the popular model of electrode boilers "Galant" establishes the requirements for the coolant in accordance with GOST 2874-82 "Drinking water". According to this document, water for the Galant boiler must have a resistivity of 1300 ohms per cubic centimeter.The coolant for electrode-type boilers requires preliminary preparation and constant monitoring of density, otherwise the power and efficiency of the boiler are sharply reduced, and it may not be enough to heat a private house!
Advantages of electrode boilers:
- small dimensions;
- safety - in the event of a water leak from the system, the boiler, unlike the heating element, will not burn out, but simply stop working;
- low price.
Boiler Disadvantages:
- the need for constant control of the density of the coolant with your own hands;
- over time, steel electrodes dissolve, giving off charged metal ions, and need to be replaced.
Power calculation
In order for the heating to be efficient and the temperature in the house to be comfortable, it is necessary before buying a boiler for heating a residential private house. A simplified calculation for central Russia is as follows: you need to take the total area of \u200b\u200ball heated rooms and divide it by 10. The resulting figure means the minimum power of the installed boiler in kW.
For example, for a private house of 95 square meters, the estimated boiler power will be 9.5 kW. In this case, you need to choose a boiler with a higher power from the model range: if there are boilers for 9 and 12 kW, you should choose the second option.
For northern regions with frosts down to minus thirty and below, or for poorly insulated houses, such a calculation is not suitable. For full heating in the winter months, a power reserve or installation of additional heating sources is required.
Of course, the boiler will not operate at maximum power for the entire heating season. With proper installation of heating, it will work up to 70% of the time with partial load or in heating mode, therefore it is wrong to calculate the cost of electricity by the maximum power of the boiler.
Connection to the heating network
All models, regardless of their type, are equipped with fittings for connecting the heating system. The best choice for an electric boiler is an unusual radiator system and warm water floors. Electricity is a rather expensive resource, and heating the room from the bottom up will reduce the comfort temperature by several degrees.
Electric boilers, unlike solid fuel models, can operate in systems with natural circulation, while the boiler automation will instantly turn off the heating elements in case of overheating.
For heating elements prone to scale formation, it is better to use specially prepared soft water. The coolant for electrode boilers is specified in the passport documentation for a specific model. Before switching on the boiler for the first time, it is necessary to fill the system with coolant and bleed air pockets.
The figure shows the connection diagram of an induction boiler to a heating circuit.
Electrical connection
The crucial moment is the inclusion of the boiler in the power grid with your own hands. The power of the boilers is such that the usual household wiring of a private house will not be able to withstand the operation of the heaters for a long time. It will begin to heat up, which will lead to the destruction of the insulation, overheating and fire.- Therefore, before connecting to a 220V or 380V network, you must do the following:
- Do-it-yourself install a separate circuit breaker in the shield, designed for the peak power of the boiler. So, a boiler with a power of 9 kW, operating from a 220V network, will consume 9000W / 220V = 40.9 A in the maximum mode. It is necessary to choose a circuit breaker with a rated current slightly higher than this value, for example, VA 47-29 by 50 A.
- The wiring to the boiler is carried out with a cable of a suitable section. It is also possible to calculate the cable cross-section with a small length: for 10 A - 1 mm2. In the mentioned case, a 4 or 6 mm2 cable will suffice.
If you are unsure of your skills, it is better not to risk connecting the unit with your own hands, but to entrust the installation to a specialist.
Alternative sources of electrical heating
Sometimes for peak loads it is advisable not to increase the power of the boiler, but to install additional sources of electrical heating. They may be:
From a heating cable or infrared mats for the kitchen, bathroom and other rooms of a private house.
Infrared heaters, installed under the ceiling and heating horizontal surfaces: floor, furniture. This creates a feeling of warmth even at low temperatures in the house.
They can be installed in areas of the house that are used periodically: an office, a library, a gym, and turn on as needed.
thermal curtains, installed above the entrance or balcony door and allowing to cut off the wave of cold air.
When installing additional heating sources, the nominal temperature on the boiler control panel can be set 3-5 degrees lower, which will ultimately lead to savings.
Heating with electricity is an expensive method, but reliable and fully manageable using a predefined program. The choice of a suitable boiler and its subsequent reasonable use will allow you to enjoy the heat in a private house at a relatively low cost.
