Do-it-yourself stove with a water heating boiler: a stove boiler into a brick oven for heating a house

Design and installation nuances

Stove heating is a potentially dangerous system, therefore, special attention should be paid to its design and proper installation.

What to look for when drawing up a project?

Typically, a stove heating scheme is developed simultaneously with a construction project, since it is closely related to the layout of the premises. The location of the stoves should, if possible, be carried out in the area of ​​the inner walls. Access to the combustion part should not be impeded by anything and it is best that it can be approached from the corridor.

Particular attention should be paid to the fire safety of the system. Since a common cause of fire is excessive heating of wooden parts, an air gap or indentation must be left between the stove and the wooden partitions.

Also, the surface of a combustible structure can be lined with bricks or equipped with so-called cuts - insulating structures made of fire-resistant materials.

Preparation for the installation of the stove begins with strengthening and thermal insulation of the floor area on which it will be installed. When arranging a furnace weighing more than 750 kg, a special foundation must be installed for it. It should be borne in mind that the structure differs from the traditional foundation for a house, from which it must be separated by a 50 mm wide gap filled with sand.

The stove model is selected taking into account the size and configuration of the room in which it will be installed. Brick layout options can be found in special reference books or on the Internet. The part of the system, which is water heating, is designed in the same way as any traditional water-based structure.

Installation features

As practice shows, a stove for water heating can be installed in two ways:

• Design and fold for a specific case.
• Install the heat exchanger in the existing oven.

The second option is considered the most time consuming and difficult. It involves dismantling the existing structure, installing a carefully sized register and re-assembling the structure. The process can be complicated by the need to replace worn-out elements.

In any case, the thickness of the so-called "water jacket" should not be less than 4 cm, otherwise the water may start to boil. This rule is especially true for systems with natural circulation, when installing the pump, the risk of boiling is reduced.

Stove heating with a water circuit - a successful variation of a traditional heating system

It is quite simple to build a country house with stove heating. Correctly designed and installed equipment guarantees long and flawless operation. Stove heating with a coolant is considered especially successful, which replaces the traditional stove everywhere. Such a practical, economical and efficient solution will ensure warmth and comfort in your home.

Stove with heat carrier

Stove heating of a wooden house in this case assumes the presence of such a coolant as water. In essence, this is a combination of stove heating and water heating. Only the efficiency is increased, and the heat is distributed evenly throughout the room, which makes it possible to use fuel even more rationally.

Heating system with stove and gas boiler

The circuit with a water circuit has all the advantages that both stove and water heating provide. The water system is built into the stove - and therefore the heat in the room is evenly distributed. In addition, an important point is that thanks to the built-in water heating, several rooms can be heated at the same time.

Thus, in this case, stove heating of low-rise buildings is a kind of solid fuel boiler. The only difference is that along with the heating of the heat carrier in the stove, the smoke channels and walls will heat up. Heat will be transferred not only from the stove to the radiators, but also from the heated surface - directly into the room. Note that stove heating projects are made only for those houses that have no more than two floors.

Upgraded heating system with stove

Creating a heating wiring diagram

It is possible to combine the stove with a water heating boiler and connect the circuit to the heating system in two ways.

Open system

At open system expansion tank located at the top point - in the attic, you can include a pump in the circuit

The coolant moves in a gravitational way, therefore, the installation of a circulation pump is required. It is placed on the bypass, reduces the temperature difference between the return and supply, increases the speed of water movement and the quality of heat transfer. Without electricity, the line will operate on a gravity basis.

To organize it, you will need to increase the line and horizontal inclined in diameter. The open system is equipped with a 32 mm spreading manifold with a slope of 3 to 5 mm for each running meter. The expansion tank is at the top, it receives air from the communications.

Closed system

The radiator network provides for the forced movement of water. The thrust in this case is created by the pump. It also builds up pressure from 1 bar for a cold heat carrier. The reservoir is of the membrane type, located at the bottom. A shut-off valve is used to connect it to the line. Safety devices (air vent, pressure gauge, drain valve) are mandatory.

Why is it profitable to heat with wood

Not all settlements in our country are supplied with gas. Therefore, for many homeowners, the problem of heating their homes is quite acute. Electricity is not always suitable as a heat source because it is very expensive. An electric heater will save you when it comes to a country house, where you need to visit no more than one or two times a month. Moreover, it does not require special installation and complex maintenance. Constantly heating a house with electricity is very expensive, and it will take a lot of money.

Heating units operating on liquid fuel are not popular due to a lot of disadvantages. You need to buy diesel fuel. This must be done in large volumes to make it cheaper, which means there is a question of its storage. It is impossible to get rid of the smell of diesel fuel; gradually it will occupy the entire room. There are, of course, pluses - for example, the ability to work in automatic mode.

The cheapest and most affordable option is firewood. You can buy a whole truckload of this fuel for very cheap. Sometimes there is an option to get firewood for free if you heat the stove with wood waste, and there is an opportunity to chop wood in the forest.

Advantages and disadvantages of stove heating

Advantages:

• for the installation of an ordinary furnace, large financial investments are not needed; red and refractory bricks, local clay and sand are used for masonry;
• if desired, you can combine the stove with a fireplace, while obtaining a beautiful decorative element and a heating device for the room;
• independence and autonomy of the heating system that does not require access to communications;
• the ability to use a relatively inexpensive type of fuel;
• no preliminary preparation is needed to put the structure into operation;
• only stove heating can fill the house with special lively warmth and comfort;
• food cooked in a real Russian oven has a special taste;
• burning wood does not harm humans and the environment;
• stove heating is the easiest way to heat a house, solid fuel is put into the firebox and ignited, as the combustion progresses, the next portion of fuel is added;
• the ability to connect stove heating to water.

Like any other type of building heating, stove heating, in addition to its advantages, has a list of disadvantages. You can buy fuel in almost any locality. To make a sufficient supply of fuel for the heating season, you need to equip a special storage space.

Disadvantages:

• installing a stove in a house takes up a lot of usable space;
• to completely warm up the building and maintain the desired temperature, you have to spend a lot of time, stove heating has a low efficiency factor;
• fuel preparation must be carried out regularly so that in cold weather there is something to heat the furnace;
• the fuel in the furnace burns out quickly, which requires constant monitoring;
• it is imperative to build a chimney and carry out its thorough isolation from structures characterized by rapid combustion;
• the room warms up unevenly, the farther from the stove, the lower the air temperature.
• when constructing a traditional stove, it is impossible to fully ensure the compliance of the premises with sanitary requirements;
• improper care of the stove and violation of operating rules can lead to a large emission of carbon monoxide into the room;
• the fire hazard indicator when installing the stove in the house increases significantly.

Compliance with simple rules will help eliminate many of the disadvantages of stove heating.

Traditional stove and hot water heating

You can significantly improve the advantages and reduce the disadvantages of traditional stove heating by connecting water heating to the stove. First of all, the heating area increases significantly, heat is rationally and evenly distributed throughout all heated rooms. The heating of the room involves the smoke channels of the furnace, walls and a heat carrier. Heat transfer to radiators occurs only when the furnace is in operation. After the cessation of combustion, the heat remains in the radiators for some time.

The device of a water-heated stove differs from a conventional stove by the presence of a heat exchanger installed in the firebox. The simplest water system is connected to the register. The design of the heat exchanger can be different, but in any case, it should warm up the coolant well and provide high-quality circulation. For the production of registers, metal pipes or sheet steel are used.

The system of stove water heating is especially popular among residents of villages and villages where there is no gas pipeline. In this case, improved stove heating is the only way to heat the house during the cold season. Such heating works even during a power outage.

Many owners of stove water heating install circulation pumps to improve the circulation of the coolant and increase the efficiency of the system. The combined installation of an expansion tank and a pump allows the entire heating system to operate smoothly in all conditions. The main thing is to melt the firebox and periodically add fuel to maintain the optimal temperature in the system.

The device of stove heating, combined with water, costs the owner of the house much cheaper than purchasing a factory-made boiler.

Disadvantages of using stove heating with a water circuit:

• to maintain the optimal temperature in the house, the stove is heated every day;
• when using this type of room heating, it is impossible to install the stove in the basement as it is done when using a factory solid fuel boiler;
• it is necessary to strictly follow the rules for installing the entire system in order to ensure sufficient circulation of the coolant;
• high temperature differences during the operation of the furnace sharply limit the choice of material for the heat exchanger; only registers made of metal pipes or sheet steel can be installed in furnaces;
• this type of heating cannot be arranged using only forced circulation.

If you are the owner of a small building, but really want to install stove heating in your house, purchasing a factory stove would be an excellent solution.

Features of the device

Having chosen stove heating as the main type, it is necessary to correctly select the power of heating devices, their type and location in the house. And this requires taking into account the heat loss and the size of the premises of the house. Heat loss depends on many factors, such as the material of the walls and floors, as well as the level of their insulation, the size and type of windows. But, on average, it can be assumed that 10 m2 will require at least 0.3 m2 of usable furnace area.

The location of the stove should be such as to maximize the use of its heat to heat the room and at the same time it is convenient to heat it. It is best if the furnace door of the furnace is located on the side of the door, taken out into the corridor or a special room. Its heating surface should provide maximum heat transfer, so it is best to place it at a distance of 20-25 cm from the wall and not obstruct it with furniture or other objects. In a wooden house, the distance to walls and other combustible structures should be 40 cm or more. If wooden walls are protected by a heat-insulating screen, then - at least 25 cm.

If stove heating with a water circuit is chosen, then the stove itself must be positioned based on the convenience of piping and its efficient operation. The dimensions of the stove itself, that is, its firebox, must be coordinated with the dimensions of the selected heat exchanger, or it must be made according to the size of the selected design of the stove.

Chimneys

In order for the stove heating to work efficiently, it is necessary to correctly build the chimney. Its height from the level of the grate should be no less than 5 m. Its cross-section can be different depending on the design and power of the heater, and, consequently, on the amount of flue gases emitted. For a small stove with a heat transfer of no more than 3000 kcal / hour, it should be at least 14x14 cm, for a more powerful one - 14x25 cm.If several stoves are planned to be built in the house, then it is not advisable to connect them to one chimney, especially if they are located on different levels. Traction problems may occur or reverse thrust may occur.

In the places where the chimney passes through the combustible ceiling, cutting is performed - thickening of the masonry and insulation using an asbestos gasket. In the place of its passage through the roof, the junction is sealed to prevent atmospheric moisture from entering through it. For a slate roof, as a rule, an asbestos cord and a cement mortar are used, for a roof made of metal or corrugated board - special lower and upper abutment strips. On the heads of the chimneys, in order to prevent moisture from getting inside them, most often, removable metal caps (headrests) of various designs and shapes are installed.

Features of wood stoves

Wood-fired stoves for heating rooms reduce the cost of heating housing when it is impossible to connect to the gas pipeline.

However, the construction of such a furnace is accompanied by its own requirements, which you should be aware of.

1. It is necessary to prepare the place where the firewood will be stored. Indeed, for the winter season, several cubes of wood may be needed.For storage, you need to choose places that are closed from atmospheric precipitation.
2. A stove for heating a house with wood needs constant care - it is necessary to clean the ash pan, keep the chimneys clean, preventing the accumulation of soot.
3. To heat the stove with wood means that from time to time it is necessary to put new portions of fuel into the firebox. In automatic mode, heating will not work.

But with all these features, it must be recognized that it is firewood that is the way out of the situation when heating a summer house or a house, when there is no gas. By purchasing a country house, you can put a stove there, buy firewood and not worry about the heating method.

In summer cottages, a gas pipeline is rarely laid. It is not required, since people do not live there permanently. However, it often happens that city dwellers move to their country houses for permanent residence, especially when such settlements are adjacent to the city limits. And then modern wood-burning stoves for heating a house will be indispensable.

Stoves from the well-known manufacturer of heating stoves and fireplaces Teplodar are quite popular. They are distinguished by quality and reliability. A wide range of heating equipment allows you to choose the best option for each individual case.

Advantages of the stove heating option:

• furnace equipment is one of the cheapest;
• installation of wood-fired boiler stoves for a house is simple, only the construction of a chimney is difficult;
• if the house consists of one room, then you cannot imagine better heating;
• if the stove is positioned correctly, several rooms can be heated at once;
• from a wood-burning stove in the room, a very good microclimate, good for health;
• it is possible to choose a unit for water heating.

Advantages of wood heating in the house

When choosing a heating method for their home, most owners compare all the options and research the benefits. Stove heating has the greatest number of positive aspects, among which the main ones can be distinguished:

1. Environmental friendliness. In terms of environmental friendliness, this type of heating simply cannot be compared with anything, since the firebox of a wood-burning stove does not harm the environment at all. When wood burns, exactly the same amount of carbon dioxide is emitted into the atmosphere as would be released during rotting wood in natural conditions. And despite the fact that the timber industry is developing rapidly, such a volume of carbon dioxide will be absorbed very quickly.
2. When heating a house with wood, a pleasant aroma appears that lasts for a long time.
3. Stove heating is advantageous in terms of cost, since firewood costs slightly less than other types of fuel.
4. The unit can be used simultaneously not only for heating the home, but also for cooking. This is especially true in cases where the house is located far from the gas main.
5. Heating a room with a wood-burning stove is quite effective, but at the same time it is not difficult. If the stove is installed according to all the rules, then the installation of radiators and other heating devices will not be required, the house will be warm anyway.
6. The stove draft not only completely removes the products released during combustion, but also establishes an excellent heat exchange between the room and the street. Thanks to this, humidity is normalized and a balanced temperature inside the house is achieved.

Of course, heating a private house in this way also has disadvantages, but they are not so significant:

• the need to regularly purchase fuel (firewood);
• you need to equip a place for storing firewood.

Correct oven placement

As in the old days, building a house begins with planning the placement of the stove. There are some rules to follow:

1. The area of ​​the room must be more than 16 squares.
2. It should not be installed close to a stone wall, then most of the heat will be transferred to the outside of the house. And in wooden houses, this is not at all recommended for fire safety purposes.
3. A heavy stove will eventually break any logs and rafters, so a separate foundation is needed for a brick stove.

Large stove with storage for firewood and a stove bench separating the kitchen and living room

Thus, for example, they put stoves in the old days, in many village huts. The stove is located in the center, and the rooms along its perimeter. This is a classic stove placement. The whole house is heated at the same time.

Classic oven layout

If the layout consists of two rooms: a common room and a kitchen, then it is wiser to take the main part into the room, and the hob and firebox to the kitchen.

Wood fired boilers

Boilers using firewood as fuel have a simple operation scheme, which simplifies their operation and repair.

The design is based on the combustion chamber. Logs are placed in it, then they are set on fire. As the combustion progresses, fuel is added and the products from the process are expelled through the heat exchanger.

Heat-resistant pipes are heated by heat, giving off heat to the furnace body, and then to the room.

There is a stand under the camera that collects ash. This part of the device is cleaned 2-3 times a week to avoid clogging. The remaining fuel can be saved to further fertilize the soil.

The work of a wood-fired boiler can be described as follows:

• As it burns, the fuel gives off heat, which is transferred to the heat exchanger.
• Heat is transferred to carriers: the furnace body or the water circuit.
• Heat carriers warm up the room.

The type of heating affects the type of device. An ordinary stove transfers heat to the room where it is located. Water heating consists in heating water, which heats the house through radiators. Air heating involves the removal of smoke through ventilation, the shaft of which is laid along the rooms. The heat gives off heat, and the cooled coolant leaves the house.

Advantages:

• Low cost of the device and fuel. Dried logs from felled trees are suitable for heating the premises.
• Wood heating does not require a special permit, like gas heating.
• The wood-fired boiler is easy to operate. It is enough to light the fire by periodically adding fuel. The ash rack is cleaned every two days. The chimney is cleaned every few months.
• Wood-fired boilers are safer than gas and electric counterparts, as they are made of heat-resistant materials.

Disadvantages:

• The boiler requires care and attention. As the combustion progresses, you need to replenish the fuel, the logs must be stored in advance. The ash tray and chimney must be cleaned.
• Although wood-fired boilers are inexpensive, a really high-quality construction comes with a high cost price.
• Fuel storage requires a separate building with low humidity.
• The combustion product, smoke, leaves behind an unpleasant smell in the presence of poor-quality draft.
• Some ovens are bulky and require more floor space.

Popular device models

Famous and high-quality brands of wood-burning boilers should be highlighted:

• NMK Siberia-Gefest KVO 15 TE.
• Protherm Beaver 20 DLO.
• Bourgeois-K MODERN-12.

The first model has a capacity sufficient to heat a building with an area of ​​150 square meters. The efficiency of the device is 70-75%. The boiler is fired with wood or coal. The heating medium obtained through fuel combustion has an average temperature of 70 ° C. The heat exchanger is made of high temperature resistant steel. The device is equipped with a 4 kW tubular electric heater. NMK Sibir-Gefest KVO 15 TE weighs 115 kg and holds pressure up to 2 bar.

The second model has the best performance. The power is enough to heat 190 square meters, and the efficiency is about 90%. The coolant temperature is directly controlled, it ranges from 30 to 85 ° C. The heat exchanger is made of cast iron, consists of several sections and is divided into two strokes. The high efficiency of Protherm Beaver 20 DLO allows you to recoup the cost of the device by saving fuel. The device is equipped with temperature and pressure control systems.

Photo 2. Wood-burning boiler NMK Siberia-Gefest KVO 15 TE.The device is made in a combination of black and orange.

Bourgeois-K MODERN-12 - pyrolysis wood-burning boiler. The control is carried out manually, although there are devices with electronics. There is enough power for heating 120 sq. m. The cost of the boiler is due to the high efficiency - 92% and the ability to operate on any fuel: wood, coal, peat and others. The heating medium reaches a temperature of 95 ° C by activating the compressor. Along with the previous model, Bourgeois-K MODERN-12 is equipped with temperature and pressure control systems.

Price

The price of a wood-burning boiler depends on the factory characteristics and the manufacturing company. It is influenced by the material of the heat exchanger and the presence of electronics that automate the control. The cost of the models presented, in rubles:

• NMK Sibir-Gefest KVO 15 TE - 18 thousand;
• Protherm Beaver 20 DLO - 45 thousand;
• Bourgeois-K MODERN-12 - 55 thous.

Main operational characteristics of furnaces

An equipped stove with a do-it-yourself water heating boiler is designed to perform two important functions: space heating and water heating. In addition, it can be equipped with a hob and oven, which will allow it to be used for cooking.

Heating equipment has a number of advantages:

• A traditional stove for 1 hour of operation releases up to 7 thousand Kcal of thermal energy, which is enough to heat a country house. The heating boiler has a higher efficiency, which makes it possible to heat a large residential building and a bathhouse. At the same time, low fuel consumption leads to significant savings.
• The combined heating system, consisting of a furnace and a boiler, ensures maximum performance at minimum costs.
• The main fuel is charcoal, wood or pellets. Such materials are affordable, easy to transport and store.
• Furnaces equipped with a water circuit do not require continuous heating. One bookmark of fuel material per day is enough to ensure rapid heating of the premises and hot water supply.
• The efficiency of combined devices in comparison with traditional furnaces reaches 85%.
• To organize an autonomous heating system, combined, with a water circuit, is within the power of any homeowner, having prepared the necessary tools and materials.

By what parameters to choose a stove

When the question arises of how to choose a stove that will run on wood, you need to know what parameters to focus on.

Power

The first thing to do is to decide on the power. The dependence is direct - for a large heating area, a more powerful model is required. The standard formula suggests the following calculation: for 10 sq. m. you need 1 kW of thermal energy. If the winters are very cold, then 10-20 percent is added.

Sometimes even less power is sufficient:

• if the region of residence is southern;
• winter temperatures are kept at the off-season level;
• the dwelling has serious thermal insulation: thick walls, small-sized windows with three-layer double-glazed windows and an attic with insulation.

On the contrary, in very cold northern regions it is expected that 10 sq. m. area you need 1.2-15 kW of heating power of the furnace.

In order for the stove to correspond to its declared capacity, all the necessary parameters must be observed, which relate to the size and location of the ash pan, grate, furnace and blower doors, the length and diameter of the chimney duct.

Potbelly stoves

In small country houses or outbuildings, the simplest units that run on wood are often installed: stove stoves. They are small, uncomplicated appearance. They are rectangular or cylindrical bodies, in which there is a firebox, an ash pan and a chimney that goes up. Of course, you can't put them in a renovated house.But on the other hand, they are not pretentious and inexpensive, they give a lot of heat. A potbelly stove with a water circuit is also popular, as it is very practical.

The design of the "burzhuikas" is simple: there are only two chambers. Fuel burns in one chamber, ash and ash spill into the other, which must be removed from time to time. There is a special door for this. It also helps regulate the air supply. The wider it is open, the stronger the draft, and, accordingly, the more intense the combustion. Not only firewood can be loaded into the furnace, but also coal. The smoke goes into the chimney.

Advantages of "burzhuekas":

• these models are very cheap, since they are simple in design and do not pretend to be a special design;
• it is possible to make the unit yourself from improvised means (the main thing is to find heat-resistant metal, you also need to be able to hold welding equipment in your hands);
• the construction of a foundation is not required, a sheet of asbestos or metal is enough.

That is, a stove-stove is a good choice from a series of economy wood-fired stoves for the home.

Fire safety requirements for stove heating at home

Stove heating in a wooden house is installed in accordance with the building codes set out in SNiP 41-01-2003. The stoves are subject to fire safety rules, which stipulate the need for measures to prevent a fire from occurring.

A separate column is environmental legislation in relation to stove heating, which restricts the use of heat generators in urban areas. In particular, in order to connect the stove, in addition to meeting fire requirements, the building must have an appropriate number of storeys (no higher than 5 floors), the presence of a special ventilation duct for removing smoke.

In 1-2 storey buildings, the height of the chimney relative to the roof of the house should be at least 0.5 m. In densely populated areas of the city, the elevation of the chimney above the building is calculated separately, depending on the location of neighboring buildings.

How to secure the ceiling and floors

Fire protection is aimed at preventing accidental ignition caused by the peculiarities of operation (strong heating of the body and chimney) of solid fuel furnace equipment.

Activities affect the following works:

When burning, the smoke inside the combustion chamber heats up to 450-550 ° C. Short-term ignition of the soot brings the temperature up to 1200 ° C. The chimney surface gets very hot. Manufacturers do not recommend connecting galvanized and corrugated steel chimneys to ovens. The best choice is a sandwich tube or ceramic.

With stove heating in one-story wooden houses, a special penetration is installed. The ceiling above the stove is protected with a metal insert. The tunnel is made of non-combustible basalt insulation. A spark arrester is installed on the head of the chimney.

At the place where the chimney passes in the attic, the rafter system is treated with antipyrine. The chimney is wrapped in thermal insulation material.
Correctly pass the chimney overlaps, providing for fire breaks. The minimum distance between the surface of the chimney and the ceiling is at least 25 cm. The gap is filled with basalt wool.

The rules for the operation of furnace equipment indicate the need for annual inspection and maintenance of the smoke exhaust system. Brickwork is checked for cracks, pipes for depressurization. Violations are corrected.

Measures to protect the walls around the oven

Fire protection measures involve the need to install wall protection around the installed furnace equipment. A gap of 1.25 m is left from the stove to the nearest surfaces, at least 1.1 m in the direction of the opening firebox.

The distance to the walls can be reduced after carrying out the following work:

• The surface of the wooden wall is covered with basalt insulation. For this purpose, basalt wool 5 cm thick is used.
• The insulation is sheathed with a metal sheet.

After carrying out the work, the gap between the furnace body and the walls is reduced to 0.5 m.

The existing requirements for stove heating of a private house dictate the need to protect the walls around the chimney. Often, the distance between the chimney and the combustible surface is no more than 25 cm, which is associated with the peculiarities of installation. The protection is carried out in the same way as the insulation of the walls surrounding the furnace boiler.

The fire safety requirements for stove heating in a residential building indicate the need for regular checks of the state of the device by an EMERCOM inspector and a stove operator. Condition audit will identify potentially dangerous defects and eliminate them in a timely manner.

What is better for a country house - stove or boiler heating

Modern heating standards make identical requirements for both stoves and solid fuel boilers. Operation and safety rules, principles of operation and heating are the same.

The heat efficiency of boilers is slightly higher than that of stoves, but they are also more expensive. Owner feedback and performance comparisons clearly indicate the following.

For full-fledged water heating of a heated house, it is better to choose a solid fuel boiler. In non-permanently heated buildings, it is better to install stove equipment operating on the principle of convection heating.

Calculation of the power and temperature of a warm water floor

Calculation and design of the heating system

The main calculation principle is that the heating system must compensate for the heat loss at home. Therefore, first of all, heat losses are estimated, on the basis of which the power (kW) that will be required to heat the house is determined. It is impossible to perform such a complex heat engineering calculation on your own. If it is not possible to entrust the calculation to engineers, you can try to perform it using special programs: Auditor OZC 6.9, nanoCAD otoplenie, VALTEC H2O. Or you can trust the practical experience of heating engineers and proceed from the fact that for every 10 m2 of the area of ​​the heated building, 1.2-1.5 kW of heating power is required. Based on the calculations, a drawing of the heating system is made, which indicates the location of all elements and the movement of the coolant.