How to choose a floor gas boiler for heating a house

Selecting the ideal floor gas boiler for your home’s heating needs is an important choice that will have a big influence on your comfort level, energy efficiency, and general heating system satisfaction. With so many options on the market, it’s critical to comprehend the important factors to take into account before choosing one.

It’s crucial to determine your home’s size and heating needs first and foremost. The amount of heating capacity your boiler will require depends on the size of your living area and the number of rooms. It’s also important to consider things like ceiling height, insulation levels, and local climate to make sure the boiler you choose can heat your house efficiently without overheating or underheating.

Next, take into account the various floor gas boilers’ efficiency ratings. Models with greater efficiency will lower your carbon footprint and save your energy costs. High Annual Fuel Utilization Efficiency (AFUE) ratings—a measure of the proportion of fuel converted to usable heat—are indicative of boilers worth looking for. Significant long-term savings on heating expenses can result from an upfront investment in a more efficient boiler.

The kind of fuel that the boiler runs on is another important consideration. Because gas boilers are convenient and reasonably priced, they are frequently used for home heating. But there are other options in the world of gas boilers to think about, like natural gas or propane. To decide which option is most practical and economical for your household, compare the costs and availability of various fuel types in your area.

Additionally, consider the features and functionalities that various boiler models have to offer. Contemporary floor gas boilers are equipped with an array of sophisticated features, including the ability to program thermostats, zone control, and integration with smart home technology. To ascertain which features are necessary for your home, evaluate your heating requirements and lifestyle preferences.

Finally, remember how crucial it is to have ongoing maintenance and professional installation. A boiler that has been installed and maintained correctly will function more effectively, last longer, and reduce the possibility of malfunctions or safety risks. To ensure that your boiler operates efficiently for many years to come, hire a certified HVAC specialist to install it and to arrange for routine maintenance.

Consider the size of your house and heating needs. Choose a boiler with appropriate heating capacity.
Think about energy efficiency. Look for a boiler with a high AFUE (Annual Fuel Utilization Efficiency) rating.

Advantages of floor gas boilers

Gas-powered floor units are superior to other heating systems and offer several benefits.

Among their benefits, the following should be noted:

  1. Good efficiency. The latest technological techniques are used to assemble combustion chambers that allow you to effectively use fuel and receive more heat from it. Thanks to this, such heaters boast high performance.
  2. Economy. Automated control system controls gas consumption.
  3. Ability to warm up large rooms.
  4. Connecting additional elements and sensors to control temperature. Thus, the house can be provided with a comfortable microclimate.
  5. Durability and performance (even without regular service work).
  6. Simplicity of installation, maintenance and repair. Many modern models are equipped with a diagnostic system that independently finds malfunctions and notifies the owner about them.
  7. Small size and low noise level.
  8. Environmental friendliness. The indicator of emissions of harmful substances into the atmosphere is close to zero.
  9. The built -in control system ensures the safe use of the boiler.
  10. Many operating modes. A wide range of customizable temperature makes the operation of the boiler simple and comfortable.
  11. Energy -dependent models are not afraid of turning off electricity.
  12. Low price of Russian gas (floor) heating boilers.

Principle of operation

Given that they are in charge of producing heat, these devices are a crucial part of the heating system. Gas-powered devices are thought to be incredibly convenient because they are technologically advanced and easy to use.

It is advised to install these units only in locations where a gas line connection is feasible. The unit will not be able to operate at maximum efficiency and fly into a penny if it is extended using liquefied gas.

These kinds of devices are composed of three main components:

  • a mechanism that regulates the supply of fuel;
  • gas burner;
  • heat exchanger.

Furthermore, floor devices are outfitted with electronic control, safety valves, diagnostic modules, and pumps for water circulation. Because of their multi-element design and similar operating principle, these heaters are frequently referred to as mini-wheeled.

The unit’s automatic system is centered on the thermal controllers and sensor indications, following which the required heat level is set. Following the start of the gas reinforcement operation, the coolant-acting liquid is heated to the proper temperature and transferred to the heating circuit via the circulation pump.

The cost of floor gas boilers

Floor gas boilers

Types of gas floor boilers

Different combustion chambers, either open or closed, can be found in floor units. Their designs and the way they absorb air to keep the flame going are different from one another.

With an open combustion chamber

Boilers with an open shape are best suited for boiler houses rather than residential buildings. These cameras operate on the principle of removing oxygen from the space, which may have a negative impact on the air quality. As a result, the house will need to be regularly ventilated, and a strong thrust chimney will be required to produce combustion products from the device.

These options’ primary benefit is their low cost; without it, closed models prevail.

With closed

There are no unique specifications needed for a smoke-eating system or ventilation for closed-type devices. They use street-sourced air for work, and the combustion chamber is routinely cleaned of soot. The use of such models is safe and practical since all combustion products are cooled when ejected by spent raw materials. Since all of the processes that convert gas into heat take place outside of the house, the room warms up without causing air pollution. Consequently, it is far more comfortable to operate floor boilers with a closed gas chamber than one that is open.

Since the pumping installation is powered by electricity, these options are energy-dependent due to their coaxial chimneys.

Selecting the ideal floor gas boiler is essential for both comfort and efficiency when heating your home. Take into account elements such as your home’s size, the amount of space you need for installation, and your heating requirements. To save money on utility bills and lessen your impact on the environment, look for boilers with high energy efficiency ratings. To prevent overheating or underheating, make sure the boiler’s capacity fits your needs for heating. For piece of mind, take note of the warranty options and safety features. Consider the cost of installation and upkeep as well when making your selection. You can choose a floor gas boiler that effectively and efficiently satisfies your heating needs by carefully evaluating these factors.

Types of heat exchangers

The most popular heat exchangers are thought to be made of steel, particularly for components made by Russian businesses. The cost of manufacturing such elements is low because steel is a cheap and easy-to-process material.

It is important to note that mechanical loads are well tolerated in heat exchangers made of this metal because they are very resilient and plastic.

But in addition to the benefits, they have drawbacks as well:

  • lack of resistance to corrosion formations;
  • To obtain a high degree of inertia, manufacturers increase the thickness of the walls, and this makes the elements harder and more massive.

Cast iron heat exchangers have a long service life and don’t fear corrosion. However, there are stringent guidelines for using gas equipment with this kind of metal. The region situated amidst the heated and warm sections of the component is susceptible to adverse impacts that may explode. It is advised to routinely rinse the cast-iron element to prevent such issues.

Heat exchangers with thin walls are installed in import units because cast iron is made using the newest technologies. However, they are not appropriate for use in Russian environments.

Copper details have several indisputable benefits over analog counterparts, including greater durability.

  • little weight;
  • small size;
  • corrosion stability;
  • For heating the coolant, less fuel is needed.

They might seem expensive, though, and there’s a chance that they could get damaged if the elements get overheated. However, in an effort to combat the final issue, manufacturers are actively lowering the amount of gas supplied and the volume of cavities.

Choice recommendations

Prior to purchasing a floor boiler on gas, you should determine the needs for the heating system and become acquainted with its primary features.

What to choose – with one outline or two

The floor unit has the option of having one or two functional contours. The first option acts as a heater by heating only the coolant. One heat exchanger is included in this type of device, which contributes to its small size and straightforward design. It is important to remember, though, that the device’s power also affects its dimensions.

The conversion of a single-circuit boiler into a water heater will require the purchase of extra parts. One option is to buy an indirect heating boiler. However, these kinds of devices are typically used to heat buildings that do not require a hot water supply, and they only use as much power as necessary to heat the space.

Two-configured models serve two purposes simultaneously: they heat the coolant and water for domestic use. Such devices have a more complex structure because they have two heat exchangers installed simultaneously.

Nonetheless, there is a single heat exchanger option known as the Bittermic. The element is split into two segments: the second fluid, the solemel, moves, and the first segment moves one at a time for heating. Although compact, units with this kind of detail are not as dependable or convenient to use.

It is better to choose a device with two independent heat exchangers if solving the issue of hot water supply and heating simultaneously is required in a large private home. They build up less scale and you can turn on the hot water supply without having to turn off the heating segment. Because of their limited power and safety requirements, double-circuit boilers are only suitable for use in small buildings.

Ordinary or condensation

Conventional devices are convection devices, meaning that water vapor is expelled through their chimneys. However, they produce a lot of heat that is reusable. The gas released during fuel combustion is collected by condensation type installations and directed into the heating contours. As a result, both the boiler’s and the system’s overall efficiency greatly increase.

By doing this, you can raise the coefficient of useful action to 100% and drastically lower the price of blue fuel. Convection heaters, on the other hand, are less expensive and simpler to set up, but these models are distinguished by their intricate designs.


The primary determinant of a boiler’s efficiency in heating a given space is its power. You can determine the required indicator on your own, keeping in mind that a 10 m 2 home needs 1 kW of power. But it’s important to keep in mind that this is only an estimate. The amount of windows and doors, the height of the ceilings, heat loss, and the building’s thermal insulation should all be considered in computations. You can always ask an expert for assistance; he will undoubtedly consider all the details.

Purchasing a boiler with a modest power supply is advised by experts. It shouldn’t go above 25% for devices with two contours, and 10% to 15% will do for single-circuit devices.

Control system

Automatic controls are thought to be the safest and most convenient flooring options. They can function independently and don’t require continual supervision from the owner. One drawback of these devices is their exorbitant cost.

Simple, low-cost installations with a mechanical system are visible in stores. However, you must keep an eye on them, control its on and off functions separately, and set a comfortable temperature.

Requirements for boilers

For heating large houses, floor units work great. This device’s installation frequently necessitates distributing the coolant over multiple floors and rooms. You must visualize the pipes’ location in your mind in order to select the appropriate equipment. This will assist in avoiding purchasing errors.

These kinds of models are heavy, so you will need to outfit the apparatus with a sturdy base. You can cover the wooden floor with sheets of galvanized iron if you don’t want to pour concrete over it.

The boilers are given the following specifications:

  1. The presence of a power adjustment mechanism.
  2. Elements of protection and control.
  3. Economical fuel consumption.
  4. Small dimensions and acceptable weight.
  5. Installation and installation should be carried out efficiently and according to all the rules. It is recommended to entrust this work to a specialist.
  6. The unit is necessarily connected to the chimney, if it is not equipped with a forced exhaust, you need to check the traction yourself.

Review of manufacturers and prices

Getting familiar with the products of the most well-known manufacturers also doesn’t hurt. Making a successful purchase and comprehending the choice issue will be aided by this.


In the 18th century, the German company Buderus started manufacturing heating appliances and related products. This brand’s floor boilers have heat exchangers made of cast iron. They have 20–375 kW of power. A long service life, attractive appearance, good assembly quality, and functionality are all boasted by Buderus models.

Model power, kWt Price, ₽
Buderus Logano G234 WS 38-55 142 555 ₽
Buderus Logano G234-60 60 179 375
Buderus Logano G334WS 115 310 568


The most well-known and heavily promoted German brand in Russia. This manufacturer is well-known for its cast-iron heat exchanger units, which have a 20-year service life. Boilers use less fuel and are highly efficient, producing little byproducts of combustion. Vaillant devices with a power output of 30 kW cost approximately 100,000 rubles.

Model power, kWt Price, ₽
Vaillant vk int 164/1-5 16.9 86 723
Vaillant vk int 254/1-5 27.2 95 864
Vaillant vk int 564/1-5 56 145 000


Italian equipment with a clean, compact design. These boilers have an atmospheric burner, a cast iron heat exchanger, and electronic flame modulation. Each customer can select the ideal heating device for their needs and budget from a variety of Baxi Slim options, which can heat buildings up to 620 square meters.

Model power, kWt Price, ₽
Baxi Slim 1.230 in 23 59,000
Baxi Slim 1.400 in 40 76 040
Baxi Slim 2.230 I 23 107 650


Customers have long recognized the quality of Viessmann floor boilers. These gas appliances are made to address issues related to heating homes and businesses. Modern materials, the most recent advancements, and fine details are employed in their manufacture.

These heating systems’ benefits include:

  • economical fuel consumption;
  • combination of efficiency and performance;
  • compact dimensions;
  • high -tech and safe burners;
  • Decorative appearance.
Model power, kWt Price, ₽
VISSMANN VR2BB24 50 212 365
VISSMANN VR2BB25 63 239 678


A large range of dependable gas units from the European assembly are available from Protherm. For private and rural homes, floor models can supply warm, hot water. Premium units with steel or cast iron construction come with injector or fan-style burners.

Potter models operate on liquefied or main gas and are electron-independent systems. Different devices range in power from 12 to 150 kW.

Model power, kWt Price, ₽
Protherm Wolf 16 KSO 16 19,000
Protherm 20 klom Bear v.17 20 57 183
Protherm Gryzli 65klo 65 154 678


Since their products have been in high demand for so long, Lemax has maintained its leadership positions in the Russian market, where it entered more than 20 years ago. The employment of cutting-edge machinery from Germany and Italy and stringent quality control measures applied to the products produced account for the quality of the floor units.

The manufacturer set up a network of service centers that produced gas apparatuses both during and after the warranty period, for the convenience of Lemax boiler owners.

Model power, kWt Price, ₽
Lemax Leader-16 16 33 250
Lemax Leader-25 25 38 350
Lemax Wise50 50 69 300


At Wolf, we’ve been manufacturing gas boilers since 1991. The company leads the European market and is ranked third among heating system suppliers in Germany.

Since the company’s products are all gathered at one factory, you can design equipment that is specifically intended to create a favorable microclimate in the home.

Model power, kWt Price, ₽
Wolf NG-31E-O-70 70 281 160
Wolf FNG-34 34 124 200
Wolf CSZ-2-20/300R 20.4 412 200

KGS "Pechkin"

The domestic producer of KGS "Pechkin" floor heaters has a wide range of blue fuel-powered models available. They range in power from 10 to 50 kW, so there will be a model that works for every buyer. Hot water can be produced and heated using double-circuit options.

Floor units can operate in systems with closed heating. They don’t require frequent inspections or maintenance because of their dependable and straightforward design. The devices’ dependability is indicated by the fewest possible details. They can function even when the fuel pressure is low. You can get an answer about geothermal thermal pumps by clicking the link.

Model Power Price, ₽
Pechkin KSG-12 with UG-15 TGV-307 12.5 kW 14 500
Pechkin KSG-20 with UG-23 TGV-307 20 kW 21 538
Pechkin KSG-50 with UG-55 820 nova 50 kW 50 725

Selecting the ideal floor gas boiler for your home’s heating requirements is an important choice that will have a big impact on both energy efficiency and comfort. With so many options on the market, it’s critical to weigh a number of factors in order to make an informed decision.

First, determine how much heat you actually need in your home given its size and your personal heating preferences. Smaller homes might get by with a boiler of a lesser capacity, but larger homes might need a boiler of a higher capacity to guarantee sufficient heating throughout. The first step in choosing the appropriate boiler size is determining your heating requirements.

Next, think about the gas boiler’s efficiency rating. Over time, models with higher levels of efficiency can contribute to lower energy costs and heating expenses. A high Annual Fuel Utilization Efficiency (AFUE) rating on a boiler indicates how well it converts fuel into heat. Long-term energy bill savings can result from purchasing an efficient boiler.

The kind of fuel that the boiler runs on is another important consideration. Although gas boilers are popular and provide effective heating, you can also look into other options, such as propane or oil boilers, depending on what’s affordable and available in your area. To choose the best fuel option for your home, weigh the advantages and disadvantages of each type of fuel.

Additionally, take note of the controls and features on the boiler. Comfort and energy efficiency can be improved with advanced features like zone heating capabilities, modulating burners, and programmable thermostats. When selecting the features that are most important to you, take your needs and preferences into account.

Lastly, when choosing a floor gas boiler, give safety and dependability top priority. Select boiler models from manufacturers who have a reputation for producing long-lasting, high-quality products. To ensure correct setup and operation, make sure the boiler complies with safety regulations and think about hiring a professional installer.

In conclusion, careful consideration of a number of factors, such as size, efficiency, fuel type, features, and safety, is necessary when choosing the best floor gas boiler for heating your home. Making an educated choice that guarantees the best possible comfort, efficiency, and dependability for many years to come can be achieved by assessing your heating needs and investigating your options.

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TOP – 7. The best floor gas boilers for the home (single -circuit, double -circuit). Rating of 2024!

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