How to arrange the oven in the house. Installing a stove in a bath with a remote firebox: we install the stove with our own hands. Choosing a place for efficient heating of several rooms
A wood stove or fireplace is a long-term investment. Therefore, predetermine suitable model and its location. The heater is selected depending on the size of the area to be heated (). Will it be one room or the whole house? When choosing the power of the heater, consider the design features of the house, the materials used for its construction and insulation, and the climatic features of the area. It is advisable to consult with an experienced specialist in advance. Here are some general tips.
1. Consider air circulation.
For efficient heating rooms, take into account air circulation: warm air rises, and the cold one descends.
Therefore, when choosing a stove or fireplace, consider their placement. You may need to purchase a ceiling fan or other appliances. If the fireplace is located on the ground floor, and the second floor is also planned to be heated, you need to see how warm air will be supplied there. The first option is free circulation. But then the heating will be uneven: in distant rooms it is colder and they warm up longer. And if the premises are isolated (the door is closed) - they will not warm up at all, or the warming up will be very long. The second option is to separate the sleeves with warm air, when warm air flows from the heater through the duct and enters the room through the ventilation grill. Here you need to consider how long you need to pull the sleeves - for a long length, you may need a special fan.
2. Use the full amount of heat.
A wood-burning stove emits infrared rays around itself as it heats up evenly. To maximize this heat, position the stove in the middle of the room. In practice, the following types of oven location in the room are used:
- Location in the center of the room. Heat is dissipated 360 degrees around the oven. Around there are no obstacles for the spread of heat. This is the most advantageous arrangement of the furnace.
- Wall location. With this installation option, heat is dissipated by 180 degrees. The space in front of the oven remains free. This method is the most common.
- Corner location. Used when you need to save space. This arrangement gives only 90 degrees from the heating sphere. For
3. If you plan to cook on the stove - take care of the ease of use.
Often a wood-burning stove is placed in the living room, as usually the kitchen, dining room and living room are connected and located next to each other.
4. Remember the basic safety rules.
Be sure to follow the requirements fire safety when planning the placement of the heater. Take the utmost care of the safety of your living quarters. Organize the protection of objects that are unstable to fire.
5. Consider where and how the chimney will go.
The issue is especially relevant if there are residential premises above the heater (second floor, third floor, attic, etc.)
Before choosing a place for the stove, decide which stove you want to fold. Sometimes stoves are placed to install a water heating boiler in them. However, keep in mind that during frosts you need to drain all the water from the heating system or live in the house all the time. Conventional heating stoves are more convenient: they can be heated at any time, and you can also leave the house without fear. If you are going to connect a new stove to another free-standing stove or flue, and it already has a stove device that closes the pipe, then you can not install it in the new stove, but if you install it, there will be no harm.
In almost all furnaces, the exit of gases from the furnace (hailo) is laid out at rear wall or closer to it. This is done to remove gases from the furnace door so that the furnace does not smoke, and to bring the hottest gases closer. going from thin to the living quarters, since the wall with the furnace door is almost always located in the kitchen, in the corridor and similar places. To heat insulated terraces and verandas, it is good to fold the stove so that its firebox and stove go out in their direction. Then the terrace and veranda will serve as a kitchen and dining room. And in the rooms there will be clean air without kitchen odors.
Typically, the stove is installed so that the front wall of the stove with the stove and firebox goes into the kitchen. Between oven and kitchen furniture leave enough free space for passage. It depends on the size of the stove and the house how far it will stand from the middle of the house. The remaining three walls of the furnace should go into the living room. Previously, to release steam from cooking food standing on the stove, they made an iron visor that went into a pipe that went into a separate ventilation channel laid out in chimney. But such a visor went out of fashion, as it interfered with working near the stove. The best option— removal of steam through a separate ventilation duct, as in a city apartment, or through a window.
Before choosing a place to lay the stove, you need to think about fire safety, that is, calculate where the stove will have the hottest wall. It is, of course, where the first gas ducts pass. Besides, Special attention you need to pay for the ceiling mats (beams). The furnace pipe must pass near them, taking into account the cutting (the space between the pipe and the ceiling), since it is undesirable to cut out mats. And in the attic, you need to check that the pipe passes between the roof rafters. Be sure to know what the surface of the stove should be in order to heat a room or house. The room should be neither cold nor hot. In a room of 10 m², the surface of the oven should be 1.5 m² (in corner room- 2.5 m²). Almost every family knows what kind of stove they want to have and in what place it should be, although sometimes the stove cannot be placed in the chosen place.
After choosing a place for the stove, the future stove is marked on the floor parallel to the walls and partitions, using a tape measure or bricks for measuring (lay out the first row of the stove dry on the floor). So that the oven does not turn out to be a rhombus, its marking is checked by a square or a cord diagonally.
It is good to check diagonally with two people using a cord or a long rail. The cord or rail is applied to the corners of the marking and, without letting go of the hands, they are transferred to the next two corners. If the dimensions match, then the oven is marked correctly, and if not, then with the help of the rule you need to gradually move the bricks in the right direction until the diagonal sizes in the two lines completely match, then it will be the exact layout (marking).
Knowing where the furnace will have a pipe, a plumb line is lowered above this place from the ceiling and they look to see if the pipe with a groove in the ceiling will pass by the ceiling matrices. If the beam interferes with the cutting, but there is room, then the furnace is shifted so that the pipe with the cutting does not rest against the ceiling beams. By the way, the pipe on the stove can be placed in another solid place. In this case, the gas duct on top of the furnace must be launched horizontally in relation to another place. Only after making sure that the pipe will pass in ceiling and between the rafters in the roof, they begin to cut out the floor or start laying the foundation of the furnace.
If it still interferes ceiling beam 1, and this most often happens in country houses, then it is cut out or cut down or fixed in a crossbar 2. This usually happens if the beams are made of edged boards mounted on edge and located close to each other. Before cutting a beam, they check how it will pass ceiling cutting 3 between beams. A protective fire-fighting layer of asbestos or felt 4 must pass around it. After making sure that the cutting is in size, they begin to work on the beams. In all types of furnaces, cutting is performed in the same way. If you cut the crossbar into the beam, then it will weaken due to damage. Therefore, it is more reliable to fix it with clamps 5 made of strip iron. From above, the clamps are fixed with nails, first with beams, and then with crossbars.
If the pipe is placed near the wall, then the crossbar will be one. The crossbar is inserted into the clamp 6, which is made in accordance with the thickness of the beam. So that the clamp does not protrude above the bottom of the beam or crossbar and does not interfere with the ceiling finish in the future, it is cut in from below, fitting flush with the beam and crossbar, after making an incision with a saw to the width and thickness of the iron strip. With a chisel, cut down the gap between the cuts. When cutting a beam, it happens that the groove on one side is close to the beam in place 7, and on the other hand, a space is formed between the groove and the beam (it happens at the same time and near two beams). In this case, this space is filled with bar 8, nailed to the beam, or boards are stuffed. It is possible to nail a rail to the beam from below in size, and fill the space above it with attic backfill.
The operation of the furnace depends not only on the quality of the fuel, but also on the internal and external air flows circulating near and inside the furnace. As soon as the pipe is opened, the fuel is set on fire, the air starts to move, and the cold one moves towards the furnace, the warm one away from it. From time immemorial, furnaces were placed closer to front door and did it right. Please note: as soon as you open the front door in winter, cold air immediately rushes into the room in a white ball, which, having traveled a distance of about 1 m, disappears. This is because there is warmer air near the door. Mixing with the street air, it quickly warms it, and it passes into the interior of the room already warmed up. If you place the stove far from the door, then a white ball of cold air will pass above the floor to the opposite wall.
In addition, it is not recommended to place the stove close to room partitions and outer wall at home, since the wall of the stove, standing close to them, will not give off heat to the room. Usually the wall of the furnaces is placed flush with the partition of the rooms. In this embodiment, the furnace wall serves as a heating shield and as part of the partition. For better heating the oven is located at the outer wall as close as possible to the front door. If it is placed indoors near the internal partition of the main wall, then there will be more heat, but cold air will walk along the legs, as the air moves from the walls, doors and windows to the stove. This must also be taken into account when laying the furnace. If in big house one stove and it stands near the outer wall of the house, then for better heating of the rooms, the partitions between the rooms must be made at least 35 cm below the ceiling.
Practice shows that the space between the wall of the house and the stove should be at least 25 cm. Even with such a distance, during the operation of the stove, the wall heats up so much that you can burn yourself. Therefore, the furnace and the first hot flue should be located as far as possible from the walls. In the vertical cutting (space) between the oven and the walls of the house, two ventilation windows with boxes and mesh to let warm air out of the space.
Gas-fired and water-heated stoves must be installed so that the firebox is opposite the window. It happens that these furnaces explode, and then a broken window will reduce the strength of the destructive wave, and the structure will remain intact.
masonry gas ovens lead with the permission of the gas organization at the place of residence. Under water heating the furnace itself is optional, any furnace can be used, and a boiler can be embedded (laid) into it. I didn’t have to put stoves in greenhouses, but I know: the lower the stove, that is, closer to the ground, the better. Heat rises to the top of the greenhouses, but it falls down with difficulty. When choosing the type of furnace, it must be remembered that all calculations depend on the size of the furnace appliances. And to change the laying of the furnace, taking into account the peculiarities of the operation of the furnaces and the wishes of the customer, only a specialist stove-maker who understands this can do it.
The correct location of the stove in the house The location of the stove in the house is determined, first of all, by the intended location of the chimney. It is advisable to place it near the internal capital walls, where smoke channels are usually arranged. In addition, it is necessary to try to arrange it so that its heat is used as efficiently as possible and its care is most convenient. How to choose the location of the furnace for maximum heat transfer? The location of the stove in the house should be chosen so that, if possible, its entire outer surface heats the largest number of rooms, while occupying a minimum usable area. To do this, it can be placed near one of the walls, in a corner or in a partition between adjacent rooms. For space heating, it is not recommended to install it close to the walls, since side walls, adjacent to the walls of the building, will practically not participate in heat transfer and part of the heat will go away. Between the side walls of the furnace and the wall, it is necessary to leave an air gap - 0.15-2.0 m (retreat), which will allow air to circulate there. Thus, this surface will participate in the heating of the room. Location in partitions for heating adjacent rooms For heating two adjacent rooms, it is most convenient to place the stove in a partition between them. The main advantage of this arrangement is the ease of erection of the chimney, which rests on the internal partition. In this case, the thickness of the partition should not be less than 250 mm. Possible options for placing heating devices in the premises of the house are shown in Fig. 1 (a, b, c, d, e, g, h). The location of the stove in the house Fig.1 Options for placing the stove in the premises: a - with an indent; b - angular; c - in the opening of two adjacent rooms; d - three adjacent rooms; e - four adjacent rooms; e - in adjacent rooms with a fireplace; 1 - furnace; 2 - wall or partition; 3 - fireplace. Combined option Often use a combined installation option heating furnace and a fireplace in one or adjacent rooms of the house. With this arrangement, flue gases are diverted into a common chimney. At the same time, the chimney must be positioned so that it is straight with respect to the fireplace, without horizontal sections, to prevent its smoking. Its cross section must be increased, taking into account the total power of the heating devices, and its height must be at least 5 m from the level of the hearth of the fireplace. Location in relation to the entrance to the room For more convenient maintenance and heating of the furnace, it is desirable to install it closer to the door. So it is easier to bring in fuel, take out combustion products (ash, ashes, slag), less garbage is generated, as a result of these works it is easier to remove it. It is also possible that the firebox is made from a corridor or other non-residential premises. In this case, all the garbage that can be brought along with the fuel and formed during its loading and combustion remains in these rooms and does not enter the living room. In addition, the possibility of smoke in the room is excluded, especially with poor draft.
You can often find country houses And country buildings made from natural wood or a bar. Such structures are considered environmentally friendly, but at the same time they are characterized as buildings with an increased level of ignition.
That is why in the process of designing a heating system and installing appropriate devices, this issue should be studied thoroughly. The problem is that the location of the furnace in wooden house regulated by the rules of SNiP and PPB.
The central place under the stove
Choosing the best location
First of all, the principle of operation of the heater will help determine the optimal location of the furnace in the house. The location may vary depending on whether it is possible to build a chimney in a particular area and equip the correct operating area.
If you definitely want the stove to be located in this place, then before the moment of its construction, you need to calculate such an indicator as fire breaks: how far constantly heating surfaces are from walls covered with flammable materials.
To more accurately determine the place of the furnace in the house, you can rely on the recommendations below:
- If the owner of the house has air-heating appliances, for example. "Potbelly stove" or "Buleryan", then they should be placed so that air flows penetrate freely. This will create a convection system, thanks to which you can warm up two adjoining rooms without doors.
- If the heater has a built-in heat exchanger, then the placement of the furnace can be any, subject to fire safety rules. However, it should be borne in mind that the furnace circuit must act as the lower boundary of the heating system.
Drawing of a standard log house
- It is impossible to complete the installation of the stove, and at the same time avoid the construction of the chimney part and pipe inside the house. In this case, the location directly depends on how it will be easier to connect yourself heater with a smoke extraction system.
- An important point is the consideration of free space when opening the door of the combustion chamber. If it is lacking, then difficulties will arise in order to clean and kindle the stove in a wooden house.
- Buildings that are supposed to be heated by stoves must have a sufficient area so that fire breaks from heated surfaces to flammable elements can be observed, which corresponds to 1.1-1.25 meters. The rule also states that the distance to the opening door of the combustion chamber should not be less than 1 m 25 cm.
Do I need to build a foundation for a metal furnace
Main advantage metal structures in front of brick structures is their lower weight, as well as ease of installation. But do not think that you can place the stove in the house, regardless of its model and specifications, without foundation. Let us consider in more detail under what conditions the construction of an additional pedestal is required and not required.
Metal version of the furnace
So, inside the house there is no need to fill the foundation if the total weight of the entire structure does not exceed 80 kg. Steel furnaces have these parameters, and any solid base that is resistant to high temperatures is suitable for their installation.
According to the requirements of SNiP, if heating devices, the mass of which is within 750 kg, are placed on a concrete pad, and not on a foundation, then the system does not require changes.
In situations where the owner of the house needs to place a stove made of cast iron, but not lined with stone, respectively, it will weigh within 400 kg, then such a mass allows the installation of a structure without a foundation. However, when subsequent lining is planned, the mass of the product can reach 1400 kg, and this already implies the mandatory preliminary construction of the foundation.
It is also worth noting the fact that if you yourself cannot determine where to place the heater best, then it is recommended to talk about this topic with a professional stove-setter.
Various installation options
What are the principles for determining the place of installation
It should be understood that the question of where the stove should be located in the house is extremely important and responsible, therefore, it is worthwhile to approach the search for an answer to it with special care.
The principles for locating are as follows:
- Any stove should be located as close as possible to the central part of the house so that the outer chimney does not go far from the ridge.
- The correct location of the device will be if other communications are not carried out under it, for example, water supply.
- When installing two furnaces in one zone, it is still better to design a foundation for each in order to protect yourself from the rapid destruction of products.
The location of the pipe relative to the ridge of the house
In addition, it should be clearly understood that one design must heat at least two rooms, otherwise its installation will not be appropriate.
Experts indicate in advance the fact that variations on the theme correct location There can be many heaters in a house.
For example, if the stove is located in the center of the room, in the absence of doors, it will heat large area than if it stood on one side to the outer wall, but with a corner arrangement it becomes possible to heat two or even three rooms at once. Although with all this, the ideal would be such an option in which the stove can heat all the rooms.
Some homeowners place the stove in such a way that it is located between the hall and the corridor. In this case, it is worth paying attention to which direction the combustion chamber window will be directed.
House layout example
If you use a material such as heat-resistant glass in the front of the stove, then you can create a kind of fireplace in the hall and enjoy the play of flame. Although in most cases the owners of the house do not want to clean the room several times a day, and take the firebox out into the corridor.
If you put the heater in the corner of the room, then it will significantly free up space and usable area. It is better if, with such a layout, the door is nearby so as not to litter the room with firewood during their transportation.
IN ideal the stove is located indoors according to the principle when it takes up the least space, but at the same time performs its function at the maximum level in relation to heating the room.
It often happens that country houses very small. That is why when building a stove in the house, there is too little space near the firebox door. This complicates the process of caring for the structure and makes it less safe. Therefore, the owners should think about increasing the area of at least one room.
Very good when built new house, in which it is only planned to implement stove heating. Then, even at the design stage, a correct layout of the structure can be created.
You can also include in the plan what Decoration Materials will be used in the future, as well as describe options for arranging furniture. After that, you can go with the document to the appropriate services, and they will give an unambiguous answer whether the place for the stove in the house is chosen correctly.
The location of the stove in the house has its own characteristics and often depends on the interior of the room that needs to be heated. The stove is placed in the house in such a way that the heat from its walls is evenly distributed throughout the house and in all rooms. and furnace heating technology, in turn, significantly affect the planning and use of building structures building. Successfully built and beautiful stoves, as a rule, serve not only as a source for heating the house, but also as an interior decoration item.
The main type of residential building in countryside is a manor house, usually equipped with heating stoves. Distinguish the following types houses:
◊ One-story with the location of the premises on one and two levels;
◊ Two-storey buildings with the location of the premises on two levels, with an attic and also with an incomplete building of the second floor.
As a rule, they start laying the furnace only when the developer has already decided on its location in the house. In order not to carry fuel through the whole house or the whole room, it is more expedient to place the heating stove in the corner of the room, closer to the capital interior walls, and as close as possible to the front door. The stove should be positioned in such a way that all its surfaces can give off heat in the room and at the same time it can be conveniently inspected systematically (wipe dust, clean from soot, repair, etc.) and service (heat).
We must try to make the house was as possible fewer ovens and chimneys, especially in those houses where there are no main walls and there is no possibility to arrange chimneys. In houses where there are no places or the possibility of placing heating stoves, stoves are located in those places where it is most advisable to place the chimney. Chimneys are usually more appropriate to place near the internal capital walls. The stove in the house should be located in such a way that all its surfaces heat the maximum of the premises, while occupying a minimum of usable area.
When determining the location of the stove in the house, it should also be taken into account that the heat transfer of their surfaces turned into each room corresponded to their heat loss in cold period. It is not recommended to install a stove for heating one room close to the walls. Because in this case, not all sides of the stove will give off heat to the room (only one side or two), the other sides will heat the wall and the heat will be wasted uselessly, which will cause increased consumption fuel.
Picture 1. Options for placing stoves in the room
The most convenient and practical open circuit placement of the stove in the house, in which all its sides give off heat to the room (see Figure-1, a and b). An air gap remains between the side walls of the furnace and the wall of the house - a retreat, the width of which is approximately from 0.14 to 2.0 m. Reducing this width will adversely affect the heat transfer of the wall located in the retreat. At the same time, an increase in this width is not permissible, because the length of the reversible sleeves for connecting the furnace to the chimney should not exceed 2 meters.
In order to heat two adjacent rooms of the house, it is very convenient to place the stove in an internal partition (see Figure-1, c). It is also convenient to place a rectangular stove in internal partitions buildings (see Figure-1, d). In this case, the stove will heat three rooms of the house at once. The main advantage of this arrangement of furnaces will be the ease of laying the chimney, which will be based on one of the internal partitions.
In this case, it should be taken into account that the thickness of the partition on which it will be based should be at least 0.25 m thick, that is, one brick. A four-room house or apartment can also be heated by installing one heating stove (see Figure-1, e). for heating two small rooms or verandas country houses, you can place the oven as shown in Figure-1, e.
With this arrangement of the household stove, its front wall on which the blower and furnace doors are installed, goes into the corridor or veranda. The rear part of the heating furnace, as well as the side walls, are located between the internal partitions.
Such an arrangement of a household stove is the most appropriate, as it allows you to save the usable area of the premises as much as possible, and the products of combustion of fuel (smoke, ash) do not pollute living rooms. Figure-1, g shows a diagram of the combined arrangement of the stove and fireplace, where one common chimney is provided for the removal of combustion products. Thus, two heating stoves can be located.
If the situation allows, then the stove should be located as far back as possible in the room, closer to the doors for more convenient maintenance and heating, as well as in order to free up some of the usable area. As a rule, the stove is installed as close as possible to the existing chimney, so that it can be fired from a corridor or other non-residential premises.
The selection of the dimensions of the furnace is the main task in designing and creating an optimal microclimate in the premises, the main parameter of which is temperature. interior spaces. When choosing a heating stove, it is necessary to give preference to stoves capable of evenly heating the air in the house during the entire cold period of the year. Also, those furnaces that are able to maximize safety in terms of fire, allow repairs and operation without problems and do not pollute the atmospheric air.
When choosing the type of furnace, the following rules should be followed: the average hourly heat output of the furnace must be equal to the heat loss of the heated premises. When selecting stoves with a periodic firebox, an important criterion is the amplitude of fluctuations in the air temperature in the house (should be no more than ± 3 ° during the day). When calculating heating, one should take into account the heat losses of all types of house structures, such as window and door openings, heat losses of walls and ceilings, the height of the heated room, the estimated outdoor temperature, and others.
Furnace calculation
The simplest methods for calculating the furnace are reduced to determining their required sizes for home heating. Next, we consider several simple options for determining the required dimensions of stoves for heating living rooms.
Option 1.
According to the schedule (see Figure-2, a), it is necessary to roughly calculate the required area of \u200b\u200bthe furnace mirror (heated surface). For example, for an area with an estimated winter outdoor air temperature of -25 ° С to -35 ° С, it is required to select a furnace for simultaneous heating one-story house consisting of a common room and two bedrooms. If the common room is corner and has an area of 18 m², then the stove mirrors should be within 4.5 m², and for a corner bedroom with an area of 12 m², the stove mirrors should be within 2.5 m². Accordingly, for an ordinary bedroom with an area of 10 m², mirrors -1.4 m².
Figure-2. Chart for the selection and calculation of the dimensions of the furnace
In this case total area the furnace mirror will be 8.4 m² (4.5 +2.5 + 1.4), and the perimeter of the furnace will be 4.2 m with a conditional furnace height of up to 2 m. Considering that part of the furnace will be embedded on both sides in middle wall 10 cm thick, the total perimeter of the furnace will need to be increased to 4.8 m. This is a large furnace with dimensions of 64 x 181; 77 x 168; or 90 x 155 cm. The heat output of such a furnace will be about 6978 W (6000 kcal / h).
Option-2.
Furnaces are selected according to the volume of the building, which can be determined by the outer perimeter and then multiplied by 21 - the amount of heat in kilocalories required to heat 1 m² of the building to a temperature of 18 ° at outdoor temperature air -30 ° C. According to these data, you can find the required heat transfer of the furnace. For a house with dimensions of 6.6 x 7.4 and a height of 3 m (in this case, the house has brick walls 54 cm thick, entrance hall, two living rooms and a kitchen), the stove is calculated as follows: (see Figure-2,b)
Furnace heat output -73.26 x 21 \u003d 1789 W or (1538 kcal / h), 1 m² of the furnace mirror emits an average of 349 W (300 kcal / h). The furnace heating area (mirror area) will be 1789 91538): 349 (300) = 5.1 m². To determine the size of the oven, the area of the mirror must be divided by active height furnace, that is, the height that is heated (2.2 m). Furnace perimeter -5.1: 2.2 = 2.3 m (2.5 m). We divide this value by two and get the length of the two sides of the furnace: 2.5: 2 = 1.25 m. If the width of the furnace is 0.51 cm, and in this case its length should be at least 0.64 m. Thus, it is possible choose the size of the oven for any room.
In addition to the stove, the kitchen has a stove that can emit 697-10467 W (600-900 kcal / h) with two fireboxes per day. You can put a heating shield on it, powered by a stove, which is capable of emitting up to 1369 W or about 1200 kcal / h of heat.
Table 1. Specific heat loss of the main cooling surfaces in residential buildings.
To enlarge an image, double-click on it.
From table-1 it can be seen that the heat loss of the walls at different outdoor temperatures is not the same, therefore, in the calculations (above 31 ° C), three units are added for every two degrees.
Option-4
Determination of heat losses and selection of a stove for a one-story log house made of logs 25 cm thick with one-sided plaster, wooden partitions plastered on both sides, a floor insulated above the basement, a double-glazed window. Corner room with an area of 9 m², window-1 = 1.7 m, specific heat loss per 1 m² of surface, according to table-1: for walls -60 W (52 kcal/h), windows -116 W (100 kcal/h), attic floor(ceiling) -30 W (26 kcal / h), insulated floor -22 W (kcal / h) per 1 m².
The total heat loss of the room, W (kcal / h), will be:
◊ External walls -16.3 x 60 (52) = 978 (848).
◊ Gender -9 x 22 (19) =198 (171).
◊ Ceiling 9 x 30 (26) = 270 (234).
◊ 1.7 x 116 (100)=197 (170).
> Total -1643 (1423).
For such a heat consumption, a heating furnace with a heat output of 1744 W (1500 kcal / h) or a slightly larger one, for example, a rectangular plastered one 510 x 770 mm in size with heat output with two fireboxes per day of 2046 W (1760 kcal / h) is needed.
