How to install a wall gas boiler?

One of the most important steps in guaranteeing your home has efficient heating is installing a wall gas boiler. It’s crucial to comprehend the procedure whether you’re installing a new system or upgrading from an outdated one. A wall gas boiler has many advantages, such as its energy-efficient construction and compact design. We’ll walk you through the process of installing a wall gas boiler safely and effectively in this guide.

It’s crucial to determine the ideal boiler size for your house and evaluate your heating requirements before beginning the installation process. Your choice will be influenced by elements like the number of rooms, the size of your property, and your hot water consumption. You can choose the right kind and size of boiler for best results by speaking with a heating specialist.

Setting up the installation area is the next step after choosing the ideal boiler for your house. Select a spot on an outside wall that has access to water and gas supply lines. Make sure there is adequate room for maintenance and ventilation around the boiler. For both safety and effective operation, proper positioning is essential.

It’s imperative to turn off the water and gas supplies to the location where the boiler will be installed before starting the installation. Prioritizing safety above all else during the installation process is imperative. To ensure the job is done correctly and safely, it’s best to hire a professional installer if you’re not confident in your abilities.

Now that the preparatory work has been finished, you can start installing the wall gas boiler. Using the proper brackets and fasteners, mount the boiler firmly to the wall first. To guarantee correct alignment and placement, carefully follow the manufacturer’s instructions. Make sure to allow adequate room for connections for ventilation and pipes.

Step Description
Gather tools and materials Collect necessary tools such as a drill, wrench, and pipe cutter, along with the boiler unit and any required piping.
Choose location Select a suitable location for the boiler considering ventilation, accessibility, and proximity to gas and water lines.
Prepare the area Clean the chosen spot and ensure it"s free from obstructions. Mark where the boiler will be mounted.
Install venting system Attach the flue pipe to the boiler, ensuring it"s directed outside to expel exhaust gases safely.
Mount the boiler Securely attach the boiler to the wall using mounting brackets, ensuring it"s level and stable.
Connect gas and water lines Attach the gas supply line and water pipes to the boiler according to manufacturer instructions, ensuring tight connections.
Wire the boiler Connect the boiler to the electrical supply, following local codes and safety guidelines.
Test the system Turn on the gas and water supply and power up the boiler. Check for leaks and proper functioning.
Finalize installation Complete any necessary adjustments and secure all connections. Ensure the boiler is properly registered and inspected if required.

Types of gas boilers

Numerous businesses that produce gas equipment provide consumers with a range of heating boiler options, all of which are specifically designed to operate on blue fuel. They are suitable for any scale and any area.

When it comes to installation kinds, boilers fall into two categories:


Indicators like high power, durability, and dependability define them. Their installation in structures with areas larger than average is their intended use. The flagship models do have a disadvantage, though, in that a separate installed and equipped room is required.


For smaller homes, these boilers are an excellent option for individual homes. They are therefore multipurpose models, and there is no need to construct a separate room for them. include an advanced automation system, circulation pump, security group, and built-in expansion tank. There is no need for additional conditions during assembly or installation.

Since they ensure the most comfortable environment possible with the least amount of effort and expense required for assembly and installation, these boilers are widely used in modern apartments, dachas, houses, and cottages. They are currently made in the application of compact permits and design solutions. We also wrote a thorough article comparing these different kinds of boilers.

Additionally, there is a section for different kinds of boiler combustion chambers.

Open combustion chamber

The natural traction of this model is high. The air is created and enters the room from the inside in one way or another, and the combustion products themselves are only expelled through the chimney. There won’t be enough oxygen if there are no ventilation openings. The thrust determines how well heating units with an open combustion chamber operate. Chimneys must be installed properly, and insulation should not be cut. There is a significant chance that combustion products will enter the room in this situation. This means that the price categories are significantly below average.

Closed camera

Their forced traction is what distinguishes them. They put in electric fans, also known as smoke exhausters, which make it possible to remove the materials produced during combustion. Via the external pipe, air enters the chamber by suction, and exits through the internal pipe.

The difference between closed and open cameras

The solution is very straightforward and obvious: it’s in the device’s features, specifically in the way oxygen is absorbed.

It should be known that, as it can only be used for private buildings, you will have to use the closed option in a residential building. For those that are open, a different room is needed.

Examining the sequence of events, one finds that air is drawn in from the outside space by a carved chimney, supplying steady and regular functioning. Substances that have already been processed may also spill out onto the street in the future. Therefore, there’s no need to incur needless costs and expenses for extra ventilation equipment.

If installing them in boiler rooms, it is worthwhile to purchase an open option only. The principle of operation involves the process of oxygen absorption from the oxygen present in the room. As a result, it’s critical to guarantee consistent and regular building ventilation.

The primary guideline is to install a gas boiler entirely apart from the home. This minimizes the risk of gas leaks and materials forming during combustion, which is brought on by not using any of the home’s air. A comprehensive examination of the pipeline for the existence of different types of distortions, scratches, and damage is necessary before any chance of an emergency can be completely ruled out.

View an illustration of how to convert an open boiler room into a closed boiler room:

The advantage of mounting a boiler with a closed camera

  1. When getting rid of the products spent in the isothermal process, a reverse reaction occurs – cooling, which sharply increases the safety and reliability of such boilers.
  2. The room equipped for this device does not overheat and protects against various and numerous air pollution, since combustion occurs only on the street, that is, not within the house.
  3. High -action coefficient
  4. The air enters the room, the pressure rises, as a result of which its temperature increases. Thus, the closed camera has environmental friendliness and purity.

Additionally, there are drawbacks:

In the absence of electricity, the installed gas boiler with closed camera will not function. But all of the work begins automatically as soon as electricity appears.

Requirements for placing a boiler room with a gas boiler

A separate room is required if the boiler’s productivity exceeds 30 kW. This is dependent on a number of factors. Specific orders are built and created to set up a boiler room that is specialized in heating for product combustion based on the provisions of "building codes and rules."

  • It is possible to place a boiler room in attics, basements, that is, in special rooms of houses. But it should be noted that the released corridor is required, sufficient lighting.
  • The installed volume of at least 14-and square meters, taking into account the power of 30-60 kilowatts and above 15 square meters with purpose for boilers of greater performance.
  • Comfortable and unhindered access to the device.
  • Wall covering with non -combustible material.
  • Providing the ventilation process in a three -fold air exchange size.

Installing a wall gas boiler is a crucial step in ensuring efficient heating for your home. By following a few simple steps, you can have your boiler up and running smoothly. Firstly, choose a suitable location for your boiler, preferably near an exterior wall for ventilation and gas supply. Next, ensure proper sizing of the boiler according to your heating needs and the size of your home. Then, hire a certified professional to install the boiler, as it involves working with gas lines and connections that require expertise to ensure safety. After installation, test the boiler thoroughly to check for any leaks or malfunctions before regular use. Finally, maintain regular servicing to keep your boiler running efficiently and safely for years to come. With careful planning and professional installation, your wall gas boiler can provide reliable heating for your home.

Three options for installing a gas boiler

There are three options available for installing a wall gas boiler in a private residence:

1. You yourself contact the company and order the service of installing the house of the gas boiler. The company"s employees not only install the boiler, but also provide post -warranty services, and also put the boiler for service.
2. In the event that you do not have the opportunity to order the service of the boiler and install it directly in the company, a specialist is ordered that sets the boiler. Then the company that sold you the boiler itself sends the service. It carries out commissioning, and also puts equipment for service.
3. If you live in rural areas, and there are no service centers nearby, then you can install with your own hands, following the instructions. Moreover, the instructions for installing a wall gas boiler in a private house should be exclusively from the manufacturer. It is also necessary to take into account when installing your heating system.

The ability to install a gas boiler with your own hands

All things considered, anyone can install a gas boiler in a private home. Everything will function as intended as long as the installation circuit and guidelines are followed. However, the input that should be generated by gas service experts is the exact exception. Additionally, only a specialized business can perform the boiler test because they are licensed and certified to do so.

However, depending on qualified staff members of an established business will be more trustworthy. After all, only they will be able to perform the required tasks with exceptional literacy and accuracy and guarantee the required safety when using the machinery.

Gas boiler installation steps

The hole for the chimney

Prior to installing the pipe beneath the chimney, a precise hole (typically 120 mm) must be made, and the chimney must be connected to a protective measuring apron.

Installation of the boiler

The boiler itself is typically attached first in the configuration, followed by the boiler’s operating instructions, warning coupons, fastener plans, and installation schemes.

The location of the boiler’s installation must be decided upon first. Boilers are typically installed in kitchens in European nations. They blend in with practically any kitchen’s decor and do not disrupt harmony. The machinery operates in a noiseless manner.

A wall-mounted gas boiler can be installed in a basement. In this situation, a few standards need to be followed. It is not too heavy, but at least two people are mounted by the boiler. Make sure there is at least 30 centimeters between you and the boiler on all sides. Concerning the boiler’s height: it’s critical that the control panel’s placement take the owner’s growth into consideration.

Crucial! so that kids cannot access the control panel. It is not a good idea to have a cauldron too high off the ground because you will need to use a ladder or stool to access specialists for repairs or services, which can be inconvenient.

Take the mounting template, which is designed to fit various boiler types (it is affixed to the boiler), next. By marking the locations of the pipes, chimney, and fasteners with the template, you can install a wall gas boiler without any issues later on. In Europe, the pipes are installed in accordance with a pre-selected gas boiler during the building process.

Installation of the chimney

The hole is made with a diameter of at least 120 mm, even though the coaxial chimney has a diameter of about 100 mm. In order to direct the chimney towards the street at an approximate angle of five degrees, backlash is required. Condensate that forms during operation ought to mix with the road. Once the chimney is installed, a foam can be bred into the hole. Two pipes make up a coaxial pipe. Combustion products are removed by the 60 mm-diameter pipe, and air from the atmosphere is drawn into the area between 60 and 100 mm. The pipe walls are a little bit warm because of this.

Plastic dowels are used in fasten bolts. They are suitable for a variety of walls.

Connection of pipes to the boiler

Regarding the eyeliner of the hot and cold water supply pipes and heating systems, there are two possibilities. First, depending on the boiler you have selected, the pipes are totaled during the building or repair phase. However, if the heating system is already in place, installing a wall gas boiler might be required.

Reverse to return, supply pipeline is connected to boiler feed. A cold water supply circuit must be connected to the boiler when installing a double-circuit boiler. The hot pipeline should be disconnected from the remaining connection and installed in a hot water riser.

Remember to install ball valves for every connection, a mud filter on the return, and a check valve on the feed.

In order to prevent large waste from falling into the boiler, a mud filter is required. To guard against unexpected coolant transfer to the supply, a check valve is required. Cranes come in handy when doing boiler maintenance.

As you are aware, installing a wall gas boiler is simple and can be completed by one person.

Gas connection

The only person who can carry out this task is a gas service employee. He will deliver the pipe in accordance with the project, and it has an independent gas hose mounted from the pipe to the boiler.

The use of cardboard gaskets is advised. Clamp-on rubber gaskets have a high risk of breaking. These days, Paronite cardboard gaskets are highly sought after.

Installation of the electric part

Because they have electronic components, it is designed for boilers with contemporary automation and closed combustion camera models. Installing the fork to the boiler wire is typically restricted to the electrical supply that is closer to the boiler. Phase dependence should not be overlooked. Simply turn the fork and reconnect it if the boiler suddenly fails to turn on.

In order to prevent spray from falling on the wiring in the event of an emergency, sockets and other connections must be spaced apart from the boiler. The gas hose needs to be braided in yellow metal. It is essential to prevent hose failure in the event of a zipper breakage or an overvoltage.

It is preferable to install a network voltage stabilizer to guarantee the safety of a gas boiler’s operation.

The launch of a gas boiler

After the wall gas boiler is mounted, it must be filled with the coolant. If the system is new, then the pressure should be approximately 1.8 bar. At the first launch, put the temperature at the level of 45-50 degrees. Modern boilers quickly disperse the system. Try to add temperature gradually in order to avoid shock temperature impact. If the capacity of the boiler is 24 kilowatts, then this is enough to heat a house of 300 square meters. meters if the house is well insulated. Try not to buy low -power boilers, since even if the area of the house is approximately 160 square meters. meters, but it is poorly insulated, then even 24 kilowatts may not be enough. It should also be taken into account that the gas has different calorie content.

The cost of the installation

Many customers are curious about the cost of the work when they contact specialists for gas boiler installation. It is crucial to realize that pricing policies can vary depending on the location.

A complex connection of the boiler with the hole and with the launch starts from 5,000 rubles. Should you be unable to complete the additional work, you will be asked for this sum. Installing wall gas boilers will cost more if the heating system is composed of metal pipes. between 6,000 and 8,000 rubles.

Additionally, set aside 3000–4000 rubles to buy supplies (hoses, pipes, taps, fittings, etc.).

Installing a gas boiler requires skill and access to this kind of work. The operation of the boiler’s system needs to be understood, even if it was installed by company experts. Because it is equipped with multiple layers of protection, the boiler itself operates as safely as possible.

A wall gas boiler installation is a wise investment if you want to improve the comfort and energy efficiency of your house. You can guarantee a secure and efficient installation procedure by taking the appropriate actions and safety measures.

First and foremost, it’s imperative that you locate your boiler appropriately. Think about things like airflow, ease of maintenance, and the proximity of water and gas pipelines. It is usually best to install the boiler on an exterior wall because this reduces the amount of pipe runs and makes venting easier.

Next, ensure that the boiler is installed by a certified specialist. Gas work is dangerous if not done correctly, so you should only trust someone with the right training and certifications to complete the job. A certified specialist will guarantee that all connections are safe, the boiler is vented appropriately, and safety procedures are observed.

It is crucial that precautions be taken to safeguard your house and possessions during the installation process. This entails keeping the work area tidy and clean as well as covering furniture and floors to guard against dust and debris damage.

Remember to perform routine maintenance after the boiler is installed. Plan yearly maintenance and inspections to keep the boiler operating at peak efficiency and spot possible problems before they become serious ones. Long-term energy cost savings are another benefit of proper boiler maintenance, in addition to extending its lifespan.

To sum up, the installation of a wall gas boiler necessitates meticulous planning, expert knowledge, and continuous maintenance. You may minimize your energy use and utility costs while still enjoying the comforts of a warm and comfortable home by following best practices and taking the required safety measures.

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Sergey Ivanov

I like to help people create comfort and comfort in their homes. I share my experience and knowledge in articles so that you can make the right choice of a heating and insulation system for your home.

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