Installing A Floor Standing Gas Boiler: Installation With Their Own Hands And Technical Standards

Autonomous heating system is the dream of many homeowners. Most of them choose gas heating, a significant disadvantage of which is considered to be the mandatory installation of equipment by certified professionals. But the control of actions of invited workers is still necessary, do you agree?

We will tell you how to install a floor standing gas boiler according to building rules. We will tell you how to prepare the room for the installation of the heat generator, how to competently organize the removal of combustion products. Our tips will help to construct a safe and effective system.

The information presented for review is based on normative documents. To optimize comprehension of the complex topic, the text is complemented with helpful illustrations and video instructions.

Article contents:

  • Preparing for the installation of gas appliances
    • Regulations for the furnace room
    • preparing the room for installation
    • Chimney: Installation requirements
  • Technology for the installation of a floor-type gas boiler
    • #1. Installation work for the heater
    • #2. Carrying out the installation of the chimney
    • #3. Connection of the heating system
    • #4. Connection to the gas mains
    • #5. Carrying out a test run
  • Conclusions and a useful video on the subject

Preparing to install the gas heating equipment

Those who are sure that the installation of the gas heater begins with its purchase are greatly mistaken.

The beginning begins with collecting the authorization documents. Simultaneously with obtaining the necessary papers, the choice and preparation of a site for the installation of the heater should be undertaken and the following regulatory requirements should be taken into account:

Gallery of images

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Boiler room to place the gas boiler and equipment

Pipes and fittings to connect the gas boiler

Requires for the installation of the gas boiler unit in the house

Foundation to install the floor boiler

Source natural light and ventilation

The specifics of installing a single-circuit unit

The rules for finishing the floor and walls of the boiler room

Gas boiler installation and setup

In order to obtain permission to install the heating equipment, There are several steps to go through:

Step #1: Obtaining Specifications and a permit.

It is necessary to find out whether it is possible in principle to install a gas boiler in a particular apartment or house. To do this, an application is submitted to the gas service with a request to carry out such a procedure. It is necessary to indicate the estimated annual volume of gas consumption.

The document will be reviewed and as a result the applicant will receive permission for installation together with Technical Conditions or a justified refusal.

Step 2: Create a project for future installation.

First it is advisable to determine the brand of meter and boiler, but do not purchase them yet. After that the project of the installation should be ordered. It is made on the basis of a previously obtained permission for a particular equipment.

The document necessarily specifies the connection diagrams of equipment, and the laying of the main line inside the building from the point of connection of gas communications. Only a licensed company has the right to deal with the project.

Installing a floor standing gas boiler: installation with their own hands and technical standards

Gas boilers are the most practical and economical option for space heating. They can be used both in an apartment building and in a private home

Step #3: Obtaining approval from the gas service.

The new project must be approved by the gas service that serves the area in which the house is located. The procedure usually takes a maximum of three months and at least a week.

At this stage, you can already acquire the gas equipment, because in addition to the project, you must submit the following documents for approval:

  • Gas boiler technical certificate;
  • certificate of compliance and hygienic certificate;
  • Heater operation manual;
  • Expert conclusion on compliance of the device with all technical requirements.

Gaining these documents is very easy. It is obligatory for the manufacturer to attach them to his products. At the end of the verification procedure, the applicant receives a coordinated project, which in this case will be given a special stamp.

If the document is not coordinated, a list of measures for correcting the project must necessarily be drawn up. After these have been carried out, the approval is repeated.

Installing a floor standing gas boiler: installation with their own hands and technical standards

A special furnace room, finished with non-combustible materials, must be provided for the installation of the floor boiler

Rules for furnace room arrangement

According to current SNIPs, the gas boiler is installed only in a specially equipped room, called the furnace room.

This rule must not be neglected, as the gas boiler is classified as potentially dangerous equipment and should be handled with extreme care. Otherwise, penalties will inevitably follow and emergencies may occur.

Installing a floor standing gas boiler: installation with their own hands and technical standards

The best option for the floor standing gas boiler is to organize a boiler room, isolated from living premises and equipped with a supply and exhaust ventilation system

First, you must calculate the capacity of the gas boiler, then determine the place for the boiler installation. The instructions allow the placement of single-circuit heaters with a capacity not exceeding 60 kW in any room of the building. Most floor standing gas units are single-circuit, since they are designed to serve only heating systems.

Two-circuit models of any capacity can not be installed in the kitchen. This is a miniature boiler room with a built-in safety group and its own expansion tank. For them is equipped with a furnace room. If the total capacity of the equipment does not exceed 150 kW, it can be installed on any floor.

More powerful units or groups of devices can only be installed on the first floor or in the basement. In any case, gas-fired boilers may not be installed in living rooms, bathrooms or toilets.

The room intended for the furnace room must have certain dimensions. Its minimum volume can be calculated by the formula: 0.2 m³ multiplied by 1 kW of unit power, but not less than 15 m³.

Installing a floor standing gas boiler: installation with their own hands and technical standards

If the walls of the furnace room are made of combustible materials they are covered with special fireproof linings

Besides this, the room has a number of requirements:

  • the minimum width of the doorway must be 80 cm;
  • the minimum ceiling height of 2.5 m;
  • a fire resistance rating of at least 0.75 hours;
  • the presence of natural light, which is calculated as follows: 0.03 sq. 0.03 sq.m. of window area for every 1 cubic meter of furnace room volume;
  • a gas analyser connected to an automatic valve which will shut off the gas supply in case of leakage;
  • efficient ventilation system;
  • the door or wall leading to an adjacent room must be equipped with a ventilation grille whose area is determined by the formula For each kilowatt of heater power, 8 square centimeters of construction;
  • providing free access to the heating appliance and ancillary equipment for repair and maintenance work.

These requirements are strictly mandatory for furnace room arrangements for open combustion chamber boilers. For units with a closed combustion chamber the area of the room is not important and the ventilation requirements are less stringent, since they do not use air from the room but take it from the street for their operation.

A gas duct is provided in the combustion chamber. Its horizontal part within the room shall not exceed 3 m.

Installing a floor standing gas boiler: installation with their own hands and technical standards

The process of gas boiler installation depends largely on its arrangement. The figure shows a general diagram of the arrangement of such equipment (+)

The number of turns cannot be more than three. Vertical outlet of the chimney risen above the level of the flat roof or ridge pitched not less than a meter. The materials used in the construction must be resistant to aggressive thermal and chemical influences.

Multilayer materials, e.g. asbestos cement pipes, may only be used in sections separated from the exhaust pipe by more than 5 m.

There must not be cavities or niches formed by horizontal surfaces in the furnace room. Here combustion products may accumulate, which is very dangerous for humans.

The space in front of the heater must be free. The floor in front of it shall be covered with a metal sheet, the minimum size of which is 1x1 m. It is forbidden to use asbestos cement for this purpose because it is quickly abraded and harmful to human health.

Installing a floor standing gas boiler: installation with their own hands and technical standards

The majority of gas-fired floor units are designed to heat the heating medium in heating systems with natural and artificial circulation type

Preparing the room for installation

Before the heater is installed, all work related to heating system arrangement, radiator installation, water distribution and warm water flooring, if present, must be completed. In addition, the electricity and sewage must be fully installed.

The boiler room must also be ready. Under the gas boiler  a strong floor based on a cement screed is laid or a separate foundation is prepared.

The latter option is not considered the best. The ceilings, floor and walls, if they are decorated with combustible coatings, must be additionally protected against possible fire.

For this purpose, non-combustible overlays made of roofing sheet steel laid on a fireproof gasket, such as asbestos, are used. The thickness of the latter sheet must not be less than 3 mm.

Installing a floor standing gas boiler: installation with their own hands and technical standards

Depending on the type of floor boiler, the number and type of auxiliary equipment differs. The illustration shows a possible installation diagram of the system paired with a wall-mounted unit

The insulation must protrude at least 100 mm beyond the perimeter dimensions of the unit housing. The minimum distance from the heater to a wall made of non-combustible materials must be 100 mm.

The distance from projecting fittings, burners and automatic control devices to the opposite wall is also regulated. This must be at least 1 m.

If the floor is made of combustible material, it must be protected from possible ignition. A platform made of concrete blocks is used for this purpose. It must be at least 100 mm high.

The elevation is covered with a steel sheet of at least 0.8 mm thickness. It is possible to make a platform for installation of the appliance from special fireproof plates.

Besides that it is desirable to install auxiliary equipment, otherwise the boiler will interfere with this. It is advisable to make a layout plan beforehand to be able to take into account all the details of the installation.

In accordance with the layout, the fixing holes on the walls and floor are marked and the necessary devices are installed. The heater is installed and connected last.

Installing a floor standing gas boiler: installation with their own hands and technical standards

Chimney arrangement options for different types of gas boilers

Chimney: requirements for arrangement

Before mounting the floor standing gas boiler with your hands, the chimney should be prepared. On a prepared base, it is desirable to expose the heater, so that the distance between its body and the wall was sufficient for the inspection and maintenance of the device. After that, to outline the location of the chimney.

It is possible not to put the boiler, and the marking to make on the basis of calculations. In this case it is necessary to take into account several nuances.

First of all, the chimney of the gas unit and the hole under it must exactly match the type of floor boiler. So, for modifications with an open combustion chamber is set chimney of separate type with a cross section corresponding to the power of the device.

For example, for devices with a capacity below 30 kW diameter pipe should be at least 140 mm, for more powerful devices from 40 kW selected chimney section of 160 mm.

Appliances with closed combustion chamber are equipped with special coaxial type chimneys. In the technical documentation of the appliance, the manufacturer always indicates the necessary diameter of the flue.

In addition to this, it should be remembered that the pipe that will connect the heating boiler to the chimney should not be longer than 0.25 m. It is also necessary to install a closing hole through which the construction will be cleaned.

Installing a floor standing gas boiler: installation with their own hands and technical standards

All fire safety regulations must be strictly observed when installing a chimney

A chimney from a boiler installed in an apartment in a multistory building must be diverted to a common chimney. If there is no such system, the gas service will not give permission to install the boiler. In a private home, everything is much easier. Here you can mount a chimney of almost any configuration. It is important that it was safe and efficient.

According to current standards, the chimney can not be mounted near the window opening. The minimum distance between them is 0.6 m. This is necessary to exclude the possibility of exhaust gases returning into the room.

In practice, sometimes the supervisory authorities allow the installation of equipment directly under the windows. In this case, make sure that the exhaust outlet is as far as possible from a vent or opening window sash.

The peculiarities of the use of steel chimneys can be seen in the photo selection:

Image Gallery

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Floor Heating Gas Boiler Pipe

Use of metal cross pipes

Taking a metal pipe through the ceiling

Tapping Gas boiler metal chimney

Technology for the installation of the floor type gas boiler

Before you remove the device from the package and check the contents once again. To know what should be in the box, you must take the instruction manual, which the manufacturer necessarily encloses in the package, and check everything according to it.

If you find any shortage, you should immediately contact the seller. The same should be done when there are traces of repair work, dents, etc.

Another important point is to check the technical data. The manufacturer's specifications on the unit must exactly match those in the data sheet. If there is a discrepancy, contact the seller.

All plugs are removed from the unit, if necessary, the pipes are washed. In this way you can make sure that there is no accidental debris that could get inside during assembly.

Installing a floor standing gas boiler: installation with their own hands and technical standards

The floor gas boiler is installed on a solid podium made of fireproof material

The process of floor equipment installation may vary greatly depending on the type and modification of the equipment. In general terms, it is the installation of the device in its intended place, the subsequent connection of communications and arrangement of the chimney. Let us consider each stage in detail.

#1. Work on the installation of the heater

First, it is necessary to put the equipment on a place prepared for it. This may be a concrete base, a small podium of fireproof board, etc. A solid wooden floor is covered with a metal sheet, which should protrude behind the boiler body by about 30 cm all around.

A different variant is used for private houses. Here, a recess is prepared for the heaters, located below the floor level by 0.3 m.

The bottom of such a pocket is filled with concrete, and the walls are finished with any non-combustible material. More often a tile. Gas boiler in the floor version is usually a fairly massive equipment.

For its transportation use the wheels, with which the device is often supplied by the manufacturer. The device is installed on a prepared base and carefully aligned.

Installing a floor standing gas boiler: installation with their own hands and technical standards

The picture shows the diagram of one of the variants of floor gas boiler installation

It should be understood that the trouble-free operation of the device largely depends on the accuracy of its alignment. Therefore, the level of the installation must be checked with a construction level.

The equipment is aligned in place by means of adjustable feet. If these are not available, small pieces of any non-combustible material such as a metal sheet are placed under the supports.

#2. Carrying out the installation of the chimney

First, the holes for the chimney must be made. Once again check the diameter of the intended parts, it must be slightly larger than the cross-section of the chimney. Make holes in the ceiling and in the roof.

Then on the outlet pipe of the boiler put on a transition adapter, which will be connected to the chimney. An important detail. Corrugated, as in the installation of wall-mounted devices, in this case it is strictly forbidden.

Adapter should be made only of sheet metal. After installing the part mount tee and the so-called revision, through which will be carried out inspection and cleaning of the chimney.

Further mount the remaining elements: straight sections of the pipe and elbows. For the passage of the chimney through the ceiling and roof, special parts are used. Special attention should be paid here to fire safety.

Installing a floor standing gas boiler: installation with their own hands and technical standards

A special nozzle is mounted on top of the chimney to protect the construction from precipitation, debris and wind

So the areas of passage through ceilings are necessarily arranged with non-combustible materials. The flue must be installed with a slight slope towards the street. The exact value of the slope can be found in the technical documentation for the boiler. This is necessary for free drainage of the condensate that inevitably accumulates in the pipe due to temperature differences. The fixing pitch of the former is 2 m, of the latter 4 m. Connections of the elements is recommended to strengthen, for this purpose they are tightened with clamps, tightened with bolts or wire.

Withdrawn on the surface of the roof or the wall pipe is raised to the desired height, after which necessarily mounted lug, which will protect the chimney from rain, debris and wind.

With the technology of assembly and installation of coaxial chimney you can read the popular article on our site.

#3. Connecting the heating system

In this step, you need to connect the boiler to the drain and supply piping of the heating system. For a single-circuit unit, this is the end of the work. For a two-circuit unit it is necessary to connect to the water piping.

First connect the heating pipes. Depending on the existing heating system, which may be either two or one-pipe, the number of pipes for connection may vary.

Installing a floor standing gas boiler: installation with their own hands and technical standards

All connections must be made in strict compliance with the rules and regulations and with mandatory sealing

In any case, specialists strongly recommend installing a strainer of rough cleaning to protect the boiler from scum particles and dirt that may get into it from the heat main.

The heater is not very sensitive to the quality of the coolant, but if its parameters are very different from those recommended by the manufacturer, additional cleaning equipment should be installed.

It could be, for example, a polyphosphate dispenser or other similar system. On the return and supply it is desirable to install shut-off valves that help prevent scalding of radiators and make it easier to repair the heater.

All connections of elements are made strictly according to the rules with obligatory sealing. For sealing the threads you can use the usual hemp and paint or more modern means.

The procedure for connecting the boiler to the water main is carried out almost similarly. It is also strongly recommended to install a filter in order to avoid unnecessary contamination of the device. It is advisable to also fit water pipes with shut-off valves.

It is best to use the so called \"American style\" valves with detachable joints, which allows a quick replacement of the worn-out unit if necessary and makes the installation much easier.

Installing a floor standing gas boiler: installation with their own hands and technical standards

Only hemp may be used for sealing the gas pipe connections

#4. Connection to the gas mains

You must know that according to the standards for the installation of gas floor standing boilers, only a qualified person may perform this operation. You can do the work yourself, but to check the assembly and make the first start-up will still be invited by a professional.

Wiring work is carried out very carefully and accurately. It starts with the connection of the gas pipe with the corresponding element of the boiler.

Only hemp can be used as a gasket. No other material will give the required tightness of the connection. It is mandatory to install a shut-off valve, which is additionally equipped with a filter.

But gas engineers strongly recommend installing a quality system here. Insufficiently efficient filter can provoke a breakdown of the boiler.

To connect it is recommended to use copper pipes, whose diameter can vary from 1.5 to 3.2 cm, or special corrugated hoses. In any case, special attention should be paid to the quality of sealing the connections. Because gas tends to leak out of loose connections and accumulate in the room and cause an explosive situation.

After the filter, there should be a flexible connection that is only made with a corrugated hose. Rubber parts are strictly prohibited as they crack over time and create channels for gas leakage.

The corrugated parts are fixed to the boiler spigot by means of a coupling nut. A paronite gasket is mandatory for such a connection.

Installing a floor standing gas boiler: installation with their own hands and technical standards

After installation and connection of the gas heating unit, the quality of connections and assemblies must be checked. The easiest way to check is to apply a soapy solution to the joint. If it bubbles, there is a leak

#5. Conducting a test run

This completes the basic work of connecting the gas boiler. The exception is the appliances with a closed furnace. For them it is necessary to make a connection to the electric network. It is better to do this through a stabilizer.

After that the system can be filled with coolant. This is done as slowly as possible in order to displace most of the air present in it. The liquid is pumped until a pressure of 2 atm is reached.

Carefully check all connections for possible leaks. After the gas service representative has inspected the connection made and the gas supply has been authorized, all connections on this piping should also be inspected carefully. They should be smeared with a soapy solution and make sure there are no bubbles. Now you can carry out the first start-up of the equipment.

A service contract should be concluded with the representative of the gas company that installed the equipment, according to which the organization undertakes to carry out regular inspections to examine the technical condition of the unit and repair it as necessary.

Conclusions and useful video on the subject

Roll #1. How to properly install a floor boiler:

Roll #2. How to avoid mistakes during floor appliance installation:

Roll #3. Example of carrying out the installation and connection of a gas boiler:

Self installation and connection of a floor-type gas boiler is among extremely responsible operations, because the safety of all residents directly depends on the correctness of its implementation.

No need to take on the case, if there is no experience in carrying out such works. It is better to invite specialists. Self-reliance and frivolity can cost too much.

Share your personal experience in the field of installation and connection of the gas boiler, ask questions to clarify controversial points, give useful advice you can in the block located under the text of the article. We are interested in your opinion on the information. Please comment.

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