Standards for installing a gas boiler

Gas remains the cheapest fuel for now. Accordingly, the cheapest heating is obtained precisely on natural gas. True, the installation of a gas boiler is associated with certain difficulties - the premises must comply with fire safety standards.

To install powerful gas boilers, a separate room is required

Gas boiler installation standards

To avoid any troubles when putting the gas boiler into operation, you must select the installation location in accordance with the current regulations. The installation of a gas boiler in a private house (single-family or locked) is regulated by SNiP 31-02-2001, and the rules for installation in apartment buildings are spelled out in SNiP 2.08.01.

For private houses

According to standards, a gas boiler can be installed in a ventilated room, which is located:

• on the first floor of the house;
• in the basement or basement;
• in the attic:
• gas boilers up to 35 kW (according to MDS 41.2-2000 up to 60 kW) can be installed in the kitchen.

With regard to the installation of boilers in the kitchen, two standards currently apply at once. According to one document, heating devices with a capacity of no more than 35 kW can be placed, according to another - no more than 60 kW. And we are only talking about heating devices. Gas stoves or other appliances that use gas are not counted.

How and where to place a gas boiler

How to proceed? You need to find out what standards are adhered to in your GorGaz. After all, it is their representatives who will take the equipment into operation. Actually, the designer should tell you all the subtleties, but it is also advisable to know this - you will need to prepare the room for installation.

Where to put

Now about where and how you can locate gas equipment of different capacities. It will be about gas boilers and columns, their power is summed up:

• with a power of up to 150 kW inclusive - in a separate room on any floor, including in the basement and basement;
• from 151 kW to 350 kW inclusive - in a separate room of the first, basement or basement floor, as well as in a separate attached room.

More powerful installations are not used in private houses.

Requirements for kitchens in which a gas boiler is installed

When placing a flow-through gas water heater or a gas heating boiler with a capacity of up to 60 kW in the kitchen, the room must meet the following standards:

• The volume of the room must be at least 15 cubic meters, plus 1 cubic meter for each kilowatt of gas boiler power.
• Ceiling height - at least 2.5 m.
• Ventilation:
  • hood with a capacity of at least three times the volume of the room;
  • the inflow is the same, plus combustion air.
• The presence of a window with a window. The window area depends on the thickness of the glass. With glass 3 mm thick, the area of ​​one glass (glass only) should not be less than 0.8 m², with a thickness of 4 mm - not less than 1 m², glass 5 mm - 1.5 m².
• At the bottom of the door, a ventilation hole (grill or gap between the door and the floor) of at least 0.025 m is required².
  

  Organization of the removal of combustion products in a floor-standing gas boiler

There is one more, which is not spelled out in the norms, but which exists: the installation of a gas boiler is allowed only in a room with doors. In the light of the latest trends - to remove partitions, and instead of doors to do arches - this can be a problem. Without a door, permission will not be signed. Exit - put sliding (sliding) or folding doors... Another option is glass doors. They do not "load" the interior, but they are perceived precisely as doors.

All these requirements must be met. With violations, you simply will not sign an acceptance certificate.

Requirements for individual rooms

Requirements for individual boiler rooms are similar, but there are some differences:

• Ceiling height - not less than 2.5 m;
• The volume and area of ​​the premises are determined by the ease of maintenance, but should not be less than 15 m³.
• Walls leading to adjacent rooms must have a fire resistance limit of 0.75 hours and a zero limit for the spread of fire along the structure (brick, concrete, building blocks).
• Exhaust hood with the same requirements: for outflow - three times exchange, for inflow in the same volume, plus air for combustion.
• The room should have a window. Glass area - not less than 0.03 m² for one cubic meter of volume.

If the equipment is installed with a capacity of 150 kW or more, one of the prerequisites is access to the street. A second exit can be equipped - to a utility room (not residential). This could be a pantry or a hallway. Doors must be fireproof.

This is how the chimney is removed from a wall-mounted gas boiler with a closed combustion chamber

Please note that when calculating windows, the glass area is considered, and not the dimensions of the window opening. Moreover, in some cases, at least one glass with an area of ​​at least 0.8 square meters is required. If enlarging windows is problematic, you can make a similar window in the door (the regulation does not say that it should be in the wall).

How to attach boiler rooms

Sometimes there is no way to allocate a separate room in the house. In this case, the boiler room is attached. The norms for the height of ceilings, volume, glazing and ventilation remain the same as for individual rooms, only specific norms are added:

• The boiler room is attached to a solid wall. The nearest window or door must be at least one meter away.
• The walls must be non-combustible. This means that they must provide 0.75 hours before ignition (45 minutes). Such materials are brick, concrete, shell rock, cinder block, foam and gas concrete.
• The walls of the extension must not be combined with the main building. That is, the foundation is made separate, disconnected, all four walls are built.
  

  The extension must be built on a disjointed foundation

Please note that the extension must be registered. No one will supply gas to you without official documents. And one more thing: when designing it, lay all the norms without deviations, otherwise they will not accept it. If the installation of a gas boiler is planned in an existing room, they may close their eyes to some deviations or offer some compensation (if there is a lack of volume or ceiling height, they may be asked to increase the glazing area). There are no such discounts for newly constructed buildings (and outbuildings too): they must contain all the standards.

United kitchens

Today it has become fashionable to have studio apartments or combine the kitchen with the living room... It turns out a single large space in which it is easy to implement design ideas. But, the gas service regards such a room as residential and prohibits the installation of gas equipment.

It is possible to install a gas boiler in the kitchen only if there is a working ventilation and doors

It will not be possible to solve the problem with a studio apartment, but with a combined one there is a way out. If you are just planning to combine the kitchen and the living room, when drawing up the documents, name the resulting room the kitchen-dining room. This area is not residential, so there will be no restrictions. If the papers have already been issued, you can try to redo them or go another way - to install a sliding partition. True, in this case, reworking of documents will be required.

Place for installing a gas boiler

Speaking specifically about apartments, gas boilers are installed in them mostly in kitchens. There are all the necessary communications here: water supply, gas, there is a window and an extractor hood. It remains only to determine a suitable place for the boiler. For such an installation, wall-mounted (hinged) boilers are used. They are mounted on several hooks fixed to the walls (usually included).

As for the installation in other premises of an apartment or house, as a rule, none of them meets the requirements. For example, the bathroom does not have a window with natural light, the corridor usually does not fit in size - there are not enough tolerances from the corners or to the opposite wall, there is usually no ventilation at all or it is inadequate.The same problem with the closets - there is no ventilation and windows, there is not enough volume.

The exact distance from walls and other objects is indicated in the boiler operating instructions.

If there is a staircase in the house to the second floor, the owners often want to put the boiler under the stairs or in this room. In terms of volume, it usually passes, but in terms of ventilation it will have to be made very powerful - the volume is considered in two levels and it is necessary to ensure its threefold exchange. This will require several pipes (three or more) of a very large cross-section (at least 200 mm).

After deciding on a room for installing a gas boiler, it remains to find a place for it. It is selected based on the type of boiler (wall-mounted or floor-standing) and the manufacturer's requirements. The data sheet usually details the distances from the wall to the right / left, the installation height relative to the floor and ceiling, as well as the distance from the front surface to the opposite wall. They may vary from manufacturer to manufacturer, so it's worth reading the manual carefully.

Installation standards according to SNiP

In the absence of such recommendations in the equipment passport, the installation of a gas boiler can be carried out according to the recommendations of SNiP 42-101-2003 p 6.23. It says:

• Gas boilers can be installed on fireproof walls at a distance of at least 2 cm from it.
• If the wall is hardly combustible or combustible (wooden, frame, etc.) it must be protected with non-combustible material. It can be a three-millimeter sheet of asbestos, on top of which a sheet of metal is fixed. Also, for protection, a plaster layer with a layer of at least 3 cm is considered.In this case, the boiler must be hung at a distance of 3 cm.The dimensions of the non-combustible material should exceed the dimensions of the boiler by 10 cm from the sides and bottom, and from above should be 70 cm larger.

Questions may arise regarding the asbestos sheet: today it is recognized as a material hazardous to health. You can replace it with a layer of mineral wool cardboard. And also keep in mind that ceramic tiles are also considered a fireproof base, even if they are laid on wooden walls: a layer of glue and ceramics just give the required fire resistance.

The gas boiler can only be hung on wooden walls if there is a non-combustible backing

The installation of a gas boiler relative to the side walls is also regulated. If the wall is non-combustible, the distance cannot be less than 10 cm. For flammable and hard-to-combustible materials, this distance is 25 cm (without additional protection).

If a floor-standing gas boiler is installed, the base must be non-combustible. A non-combustible stand is made on the wooden floor. It should provide a fire resistance limit of 0.75 hours (45 minutes). These are either bricks laid on spoons (1/4 of a brick) or thick ceramic floor tiles that are laid on top of an asbestos sheet fixed to a metal sheet. The dimensions of the non-combustible warp are 10 cm larger than the dimensions of the installed boiler.