How to choose a gas boiler in the house

Boilers for apartments

The problem of competent organization of autonomous heating is faced by many. homeowners, firms working in the field of low-rise construction. One of the problems that must be solved. the purchase of the optimal model of the heating unit. How to choose the right boiler for installation in a small private house (an apartment in a duplex or a townhouse. there are enough variants), when replacing the equipment that failed, or the need to upgrade it? The range of units in this category is significant, but this does not a priori mean that in small areas you can mount any sample.

The classification of these units is quite complicated. Given the peculiarities of their installation and some restrictions related to the specifics of heating apartments in townhouses or small cottages, the most important parameters are.

Type of fuel

When choosing a model for an apartment, a private home should focus only on gas boilers.

All others (solid fuel, liquid fuel or combined heaters) are clearly not suitable for them. The reasoning is simple. any “fuel” (fuel oil, pellets, etc.) must be stored somewhere. The option with an electric device is also out of question. In addition to the complexity of the installation (a separate line for the trimmer, RCD, AV or diffuser), there are two other problems.

  • Grounding. How to connect the boiler to the appropriate bus? You will need the services of a specialist, and the practical implementation (depending on the type of electricity supply) will cost quite expensive.

WHICH IS THE BEST GAS BOILER for your home. Looking into the best boiler for uk homes in 2022

  • This method of heating is economically unprofitable. Given even the minimum capacity installed in the apartment boiler per month meter will screw on a very “tidy” sum.

2.1. According to the way of installation

Here there is no choice. only a wall mounted boiler. To install a floor model requires a separate room (furnace room), as well as compliance with a number of requirements for the placement of gas equipment. For townhouses, small cottages, duplexes, low-rise apartment buildings. not an option.

2.2. By capacity

The most common advice, which can be obtained from the manager in the store. to orient to the ratio of 1 to 10 (boiler output, in kW / area of the apartment, in m 2 ). But is it all so simple??

  • No technical device can work for a long time at the limit of its capabilities. breakdowns are inevitable.
  • No matter how well an apartment is insulated, it is impossible to reduce heat loss to zero.
  • The heating intensity is influenced by the wall material and the position of the apartment in the house (whether it is a corner one or not, and a number of other factors).

Therefore, when choosing a gas boiler, the value of calculated capacity (according to the above formula) should be increased by 30. 35%.

2.3. By type of combustion chamber

It can be open or closed. Here the construction specifics should be taken into account.

  • With an open chamber, it is much easier to install the boiler in the apartment. you only need to connect its pipe to the common chimney. Some disadvantage of this solution is that by taking the air from the room, it somewhat “dries” it. But this is the best option for the gas boiler, and regular ventilation of the dwelling compensates for this drawback.
  • A closed chamber requires the air intake (to ensure the combustion process) from the outside. So, we will have to chisel the wall and install a flue bend (or coaxial chimney). How rational it is and whether it is possible in principle depends on the type of building. Well, if the boiler is chosen to replace the expired one, with an open chamber is definitely not suitable. the additional costs for installation will be too high.

2.4. According to the number of loops

It is easy to determine this. If the apartment, cottage has a flow-through water heater (gas boiler), and one is enough. But if you need to provide both heating and DHW, then it is advisable to buy a two-circuit boiler for a townhouse or private house, although it costs more.

Everything else is secondary and at the discretion of the buyer. For example, type of control, availability of remote control, number of options in the menu, shape, color scheme and so on.

Energy efficiency of gas heating boilers

For the most part, this item is for those who have not yet decided on the type of fuel or want to know how much to expect when heating your home with natural gas.

choose, boiler, house

You should start with the cost of bringing the gas pipeline to the house if it is not yet laid near it. from 200 to 500 thousand rubles. rubles. The cost of permits, installation and connection is another 5 to 50 thousand rubles. Rubles. Together with the cost of the boiler is the initial one-time costs, but more always interested in the regular costs associated with the cost of fuel used.

Calculate the energy consumption of the gas boiler can be in two ways: using the maximum possible gas flow rate (this parameter is always specified in the technical specifications of any model) or through the specific heat of combustion.

For a rough, but quicker, calculation through the maximum flow, take as an example one of the most common gas boilers in Russia. Baxi ECO-4s 18F 18 kW, the maximum flow of which is 2.11 m3 /hour. In a day this is 2.11(m3 /hour) 24(h) = 50.64 m3. In cost terms, according to the current tariff for natural gas in the Moscow region (for the first half of 2021) 5.92 /m3. 50.64(m 3 ) 5.92.) = 299.79/day (maximum consumption). A boiler with such a heating capacity can heat an average sized house of up to 180 m2.

practical and precise is the method of calculation by specific heat of combustion of natural gas, which is 9.3-10 kW per m 3. depending on the fuel quality. This means that to get 1 kW of thermal energy, you need to burn about 0.1-0.108 m 3 natural gas (0.592 rubles / kW). As a comparison, the cost of 1 kW of heat energy when using hard coal (w 7-15%). 1.1-1.3, when using wood (w ≈ 60-50%). 0.79-0.98

How to choose the proper size for your boiler

In order to heat an average 2-brick house with a ceiling height of 2.7 m in the climate zone near Moscow, the heating equipment needs 1 kW of heating capacity for every 10 m 2. This rule is based on the average heat losses (1 kW per 10 m2 ) of the house described.

Let us assume that we have the above-described average house with an area of 180 m2. whose heat loss is 18 kW (per hour). In 24 hours this equals 1824 = 432 kW. That means the boiler has to make up for the 432kW of heat loss and will use 0.1m3 to do this. amount of gas to produce 1 kW of thermal energy) 432 (kW, heat loss per day) 1.1 (average efficiency of a modern boiler of 90%, the exact value depends on the model) = 47.52 m 3. In terms of value it is 47,525,92 = 281,32 /day.

The norm of 1 kW per 10 m2 is calculated taking into account the entire heating season. This means that heat loss, and thus gas consumption, will be maximum (299.79 /day) with the highest heat loss of 18 kW on the coldest days or minimum on the warmer days of fall/spring. On average over the season for the house described above, it will still be about 281.32 /day.

How to choose the right type of gas boiler

Deciding which gas boiler for heating a private home is better to choose, you should not be guided solely by the price. There are other selection criteria, and no less important. And before you go to the company, engaged in supply and installation of heating equipment, it is necessary to get at least a general idea of what are the gas boilers. This will help you avoid mistakes that can cost you quite a lot.

Wall mounted or floor standing gas boiler

According to the method of installation, all gas boilers are divided into wall and floor boilers. The main difference between the two types is the size. All other differences. power, a number of other technical parameters, cost. can be considered as a consequence of the first.

Wall-mounted models are compact and lightweight. As a rule, for such devices do not even allocate a separate room, placing them in the kitchen or bathroom. Wall hung boilers have a relatively small capacity, which is quite predictable, given their modest size. As a consequence, they do not allow for heating a large area of the house. The main advantage of the wall gas boilers is their low cost.

Wall mounted gas boiler.

The weight of the average floor standing boiler is about 100 kg. Such units are usually located in the boiler room. Most floor models have an open combustion chamber, which means that the room must be equipped with high-quality forced ventilation that provides a constant flow of air.

Floor standing gas boilers are on average much more powerful than wall hung boilers: with their help it is possible to heat a sufficiently large country house. Another advantage of floor heating units is their longevity. This is mainly due to the fact that some of the components are made from more reliable materials.

For example, in floor units, as a rule, install a cast iron, rather than steel, as in wall-mounted models, heat exchanger. Cast iron is known to be less susceptible to corrosion, and therefore will last you longer. Of course, cast iron is much heavier than stainless steel, but after all for floor boilers, unlike wall mounted, the heavy weight is not a problem.

Floor standing gas boiler.

Of course, the powerful and reliable floor standing unit will cost you more than the wall mounted. In addition, the complete set of floor models often does not include an expansion tank and circulating pumps. these elements of the system will have to buy separately.

Single-circuit or double-circuit gas boiler

For a comfortable stay in a country house is required not only to heat the room, but also to provide water heating for household needs. Of course, you can buy a gas or electric boiler in addition to the heating gas boiler. However, there is a simpler solution. a two-circuit boiler. It has two heat exchangers connected to two mains: one circuit is responsible for heating, the other for hot water.

Note that the second heat exchanger is far from the burner and is not heated by the flame, but the coolant heated on the primary heat exchanger. The flow of the coolant through the heating circuit at the time of operation of the DHW is suspended. It follows that despite the presence of two circuits to work simultaneously in two directions, i.e.е. Provide hot water and heat the room, such a boiler can not.

And this in turn means that while you take a shower or wash the dishes, slowly cool your radiators. However, practice shows that in a small area house, where hot water is consumed in reasonable quantities, it is almost imperceptible.

Providing residents of the house with hot water through a two-circuit gas boiler can be implemented in two ways: with a flow-through water heater or a built-in tank. The first option is suitable only for those who do not consume more than 10-15 liters of hot water at a time.

In the second option, you can count on larger volumes. The capacity of the built-in tank is usually 30-60 liters: this is enough to take a quick shower without feeling any discomfort.

Boiler with a built-in boiler in section.

If you have a large family and, accordingly, the increased hot water consumption, it is better to install a single-circuit boiler and connect to it 100. or even 200 liters of indirect water boiler. The latter represents a large insulated metal tank, in the coil of which the heating system coolant flows.

In the summer the coolant circulation in the heating system is closed, so that only DHW water is heated.

Boiler with a boiler of indirect heating.

What gas boiler to choose. single-circuit or double-circuit, depends on the amount of consumed hot water by tenants and the area of the premises that need to be heated. Double boiler. a good option for a modest-sized home: no need to install a separate heater and a separate water heater for hot water, and it gives you the opportunity to save space.

If the house is large, it has several points of water intake, and the number of families is large enough, then you should give preference to a single-circuit boiler with a separate storage boiler indirect heating. You can also think about installing a dual-circuit gas boiler and a storage boiler with parallel electric heating: such a system will allow you to have hot water even in case of failure of any of the devices.

Convection or condensing gas boiler

All gas boilers are divided into convection and condensing. What are their differences, and which one to choose??

How to choose: Gas boiler for private home heating

The permanent author Houzz, interior journalist. At different times I worked as a correspondent, editor, chief editor in different publications of the city of Karelia.Saint Petersburg. I actively wrote about interiors for the website 4living.

Gas boilers remain the most economical way to heat your home and get hot water. Let them be a little bit more expensive than electric and solid fuel, but they pay off at the expense of the cost of fuel. Especially the main (not counting how much you have to pay for the connection).

Power calculation, piping design and installation of gas equipment is a serious business, which must be handled by professionals. But the basics should know all those who have set out to switch to gas. We tell you how to choose a gas boiler for your home.

Floor standing or wall mounted gas boiler. which is betterThe type of installation gas boilers are divided into wall and floor standing. Those that are mounted on the wall, smaller and lighter, their weight usually does not exceed 80 kg. Power wall models rarely exceed 35 kW, and the volume of built-in boiler. 40 liters. This is a good option for a small house of up to 100 sq.m.M. and not only because of the modest heating capabilities. Wall mounted boiler without a separate boiler does not need a separate room. it can be placed in the kitchen or bathroom. Many models have a closed combustion chamber, which allows you to bring the chimney into the wall.

Floor standing boiler is heavier. most models for the house weighs more than 100 kg. Most often, such a device involves the presence of the boiler room, and she, in turn. compliance with all standards set out in the profile SNIP. It regulates the height of ceilings, and the air exchange rate, and the size of the podium for the boiler. Most floor models have an open combustion chamber, which means that you need to ensure a constant air supply. But such devices are more powerful on average than wall.

The weak point of floor boilers is the heat exchanger. It is often made of steel to reduce the weight and cost of the appliance. However, steel does not tolerate condensate with acidic properties on the walls. Heat exchanger replacement is about half the cost of the boiler. Copper heat exchangers have a longer service life, but the price is higher.

choose, boiler, house

For floor standing boilers the high weight is not a problem, that is why their heat exchangers are often made of cast iron. It is an ideal material: eternal (lifetime up to 50 years) and heat absorbing. The only disadvantage is its brittleness. In addition, there is evidence that cast iron does not react to sudden temperature changes in the supply and return lines.

Choosing a wall or floor gas boiler, note that wall hung boilers are more affordable also because they are equipped with circulation pumps and an expansion tank. Floor standing boilers are often sold without these parts, so you have to buy them separately.

Sometimes the heating system of single-circuit boilers is filled with antifreeze instead of water. but not car, but special. Unlike water, it does not leave scale and does not cause corrosion. i.e. increases the life of the boiler and pipes. In addition, water freezes at sub-zero temperatures and can burst pipes if the boiler fails in the winter, and there will be no one in the house. Antifreeze gets rid of this headache.

In a wall mounted gas boiler, especially a two-circuit, it is better not to pour antifreeze. a high risk of deformation. And if antifreeze leaks, it’s a local environmental disaster. That’s why antifreeze is only suitable for floor models.

choose, boiler, house

Traditional or condensing. which is more profitableBoilers are divided into convection (traditional) and condensing heating. In the former, the fuel burns, heating water, and the gases go down the chimney. Their temperature is above 100 degrees, which saves pipes from dangerous condensation. gas escapes without cooling to the dew point. The efficiency of such a boiler. 90-100 percent. The highest efficiency of this type of devices have low-temperature boilers, but they work on the verge of condensation (steam falls out at 60 degrees). On its own, it is not so terrible, but connecting with the gases, it turns into acid, deposited on the walls of the chimney.

In condensing boilers, the efficiency often exceeds 110 percent (at least 98 percent), because it is not only the heat from the combustion of fuel, but also the energy released during the formation of condensate from water vapor. Cold water in the reverse direction takes the heat generated by cooling the gases. Such a system is more economical, provided that it is equipped with a sensor of the street temperature. In addition, condensing boilers use a closed combustion chamber and coaxial chimney, which also saves fuel (compared with the traditional, the consumption is less by 20-30 percent).

The gases in the chimney is not heated above 80 degrees, so you can use the cheaper plastic pipes. As a result, condensing boilers, though more expensive than convection ones, can be more profitable with the proper regulation of the system. Although the range of such boilers in stores is much inferior to traditional boilers.

Condensing boilers are often recommended for homes with underfloor heating. less variation in temperature between supply and return.

Single-circuit or double-circuit. how to choose a gas boiler for the house Gas boilers also differ by the scheme of heating. Single-circuit is a model with one line. Initially, this scheme is designed for heating a private home, including. floor heating.

Gas two-circuit boiler has two heat exchangers and is connected to two mains, independent of each other. One is responsible for heating, the other for hot water. Hot water in this scheme can be provided in three ways: with a built-in tank, a flow-through water heater or a separate boiler. The latter option. if you need a lot of water, because the built-in tank rarely exceeds 60 liters, and the flow-through heater is highly dependent on the head of cold water and does not allow you to use multiple sources of hot water at the same time without loss of temperature. That said, all methods are quite compatible. Most often boilers choose a volume of 100-200 liters.

It would seem that a large house and a large family automatically imply the use of a two-circuit floor or wall mounted boiler. And for the house, where you come alone for the weekend, the single-circuit is good. But it’s not that simple.

How to choose: Gas boiler for hot water

Regular Houzz author, interior journalist. At different times I worked as a correspondent, editor, chief editor in different publications of the city of Kiev.Saint-Petersburg. Actively wrote about interiors for the website 4living.

Choosing a gas boiler for heating the house, it is necessary to understand at once, as will be arranged and hot water supply. There are several schemes. and each has its own pros and cons. In short, the owner of the gas boiler can get hot water using the built-in flow heater, integrated storage tank, “bundled” electric boiler and indirect water heater. Let’s figure out which one is suitable for your family.

Flow water heaterGas boilers are divided into single-circuit (heating) and double-circuit (heating and hot water). This does not mean that a single-circuit boiler is not able to provide the house with hot water. But initially, in the original configuration, only the unit designed for two circuits has such a function.

How it works? Two-circuit boiler has two heat exchangers: the main is responsible for heating the coolant in the heating system, and an additional one essentially works as a flowing water heater. When someone turns on the water in the faucet, the valve switches the coolant to the secondary heat exchanger and begins to heat the flowing water. The DHW system has priority. as long as the water comes out of the tap, the heating does not work.

Two-circuit gas boilers are often wall mounted, with closed combustion chambers and thin coaxial chimneys. They look neat and don’t cost much more than the single-circuit ones. In addition, this boiler is practically a mini-boiler, it already has all the necessary stuffing: a circulating pump, expansion tank, controller, security system. With a single-circuit version you need to buy all this separately. Finally, it is convenient to use in the summer: you can get hot water without heating up the house.

What’s wrong with this option?? Firstly, that heating and DHW can work only in turn. that is, while you wash dishes, the temperature in the heating system will slightly decrease. Secondly, such a system can provide hot water for no more than two points of water intake, and then if the boiler is more powerful than 25 kW. The water in the flowing system just doesn’t have time to warm up. If you’re taking a shower and someone opens the tap in the kitchen, you’ll get cool water. And in the kitchen it will not be particularly hot.

And what if you take a boiler with power more than 30 kW? The situation will improve, but not by much. at the inlet and outlet section of 1/2 inch (single-circuit. 3/4) a large flow of hot water do not wait.

There is another nuance: when you turn on the faucet, especially more than 5 meters away from the boiler, you have to wait 10. 15 seconds until the cold water is replaced by hot. This is unnerving. In addition, you have to drain a lot of water to no avail.

So, a two-circuit boiler with a flow-through water heater, which does not require a boiler, is good for a small house or apartment, because it significantly saves space. It makes sense to choose, if the family. a couple of people.

Integrated storage tankDouble circuit boiler with a built-in boiler of stratified heating is a completely different matter. For all the advantages of two circuits, it is devoid of many disadvantages of the model without a storage tank. Thanks to the built-in “thermos” such a boiler can immediately issue water of a given temperature at several points of water intake. If you put a circulating pump, hot water will be practically at the faucets and watering cans. no need to wait at all. In layer heating boilers there is no heat exchanger, and the water is heated by a flow heater. While you use up the supply, a new one will heat up.

Both mounted and floor standing models are equipped with built in accumulators. The latter are especially good, since they have larger tanks.

On the average, the boiler of stratified heating is half as effective as an indirect heated boiler (with a coil), and in the initial stage of operation. even more. Water enters the top layer of the tank is already hot, and from there it is taken into the DHW circuit. In five minutes you can take a shower. In a boiler of indirect heating all the water is heated simultaneously, and the waiting time will take four times more. With infrequent and irregular use of hot water boiler stratum heating will be more profitable than the indirect. less heat loss during cooling and heating. again. the place: a boiler with a layer heating boiler with a volume of 20. 30 liters does not particularly differ in size from the boiler without a boiler. It does not need a boiler room.

What disadvantages? First, the price: gas boilers with integrated boilers are much more expensive than their pure flow-through counterparts.

Secondly, the volume. Alas, it is usually very modest. 30. 60 liters. If it is enough for express shower, it will not be enough for a bath. That is for a large house and a large family is not suitable. Floor models with storage tanks over 100 liters will cost more than the boiler and boiler separately.

Thirdly, two-circuit boilers with hard water. a bad option, and with a boiler, and without. The plates of the secondary heat exchanger quickly overgrow limescale, boiling occurs. Cleaning. not a panacea: the more often you clean, the faster the scale settles. So if you have already bought such a device, you will have to deal with the preparation of water. Give it to the analysis before installing the system. In the laboratory you will be given recommendations to soften and purify water. Somewhere charcoal filters are enough, and somewhere you need a chemical treatment unit.

Indirect heating boilerIf you always need hot water at a comfortable temperature, it makes sense to choose a single-circuit boiler and connect an indirect heating boiler to it. In contrast to the boiler of stratified heating, it has a coil (spiral heat exchanger), in which the hot water or antifreeze from the heating system moves, giving part of the heat to the water in the tank. Even with the turned off heating, it cools down for a day only a few degrees thanks to the insulation made of polyurethane foam.

The tank of the storage water heater is usually made of stainless or enamelled steel, sometimes glass ceramic is used. A magnesium or titanium anode fights corrosion in the tank of the water heater. The latter is more expensive, but better. Copper heat exchanger is preferable to steel.How much will be profitable for you boiler. whether electric, with a heating element, or indirect heating, depends on the thermal insulation tank: a good never less than 4 cm thick. If you will be using the appliance constantly, do not save: the better insulation, the less you spend fuel.

What are wall mounted dual circuit gas boilers

Gas hinged dual-circuit models with the same dimensions and heating technical characteristics combine the functionality of two devices at once. the boiler and a flow (less often. storage) water heater. The heating medium from the heating circuit in two-circuit models does not mix with sanitary water in the hot water circuit (DHW).

It is reasonable to install hinged two-circuit models in small and medium-sized houses up to 350-400 m 2. in which the distance from the boiler to the point of consumption is not too great (7-10 m). Otherwise the preparation and heating of running water will take too long, from 20 seconds or more, which negatively affects not only comfort, but also the consumption of water and fuel.

Another important point is the number of people living in the house, or rather the number of simultaneous consumption of hot water. Most dual-circuit models operate on the principle of DHW priority, i.e.е. When the hot water consumption point is opened, the heating circuit is heated. Rarely, usually in more expensive models, where the distribution of performance is implemented by a three-way valve, heating of the heating circuit does not stop completely, but the performance is still reduced.

In practice, this means that if several hot water outlets are used simultaneously, the DHW circuit capacity may be insufficient, not to mention the heating circuit. The total number of rooms with hot water consumption points (bathroom, guest bathroom, kitchen, etc.) must therefore not exceed three.д.) must not exceed three.

Design and principle of operation

Two-circuit wall hung boilers differ from single-circuit boilers only in the presence of an additional heat exchanger and the distribution of output between the circuits. Technical arrangement may vary from model to model, but the standard structure is simple and straightforward: burner, to which the gas is fed and its igniters → the primary heat exchanger, inside of which is the heating circuit coolant and the secondary heat exchanger, inside of which circulates the DHW circuit water → the system of removal of combustion products in the chimney.

All well-known and widespread models from the factory are equipped with all the necessary elements and units for heating system: expansion tank, circulating pump, automatic air vent, safety valve. pressure gauge, set of sensors, etc.д. This means that for a standard heating circuit, all that is required is a supply and return line to the boiler, as well as source of water for the DHW circuit (e.g., a water supply and return line to the boiler). water supply).

For a better understanding of the operation of two-circuit models, consider the functionality of each circuit separately:

  • Heating. the basic circuit in which the coolant circulates continuously, heating in the heat exchanger and giving heat through the radiators in the heated rooms;
  • Heating water. is activated only at the opening of the hot water consumption point, redirects all or part of the heating agent of the heating circuit for water heating.

After closing the consumption tap, the boiler switches back to the heating circuit and heats it if the coolant has had time to cool, or goes into standby mode (background heating) if the temperature is all right.

For traditional two-circuit boilers is always characterized by a delay in the supply of already heated water (from 5 to 15 seconds), but there are models without such a delay, with a built-in boiler, working on the principle of the storage heater, which we will talk about when describing the selection criteria. In any case, there is also a delay in the supply of hot water, independent of the boiler, due to the length of the pipe between the boiler and the point of consumption, which contains cold water.

Advantages Disadvantages
Higher efficiency. despite its compact size, the technology, the alloys used and the more advanced automatics allow achieving on average 3-5% higher efficiency compared to floor standing boilers of the same price category. Durability. due to weight limitations, heavy and durable cast-iron heat exchangers are not installed in wall-mounted models, while the service life of steel on average 12-15 years, copper. 14-17 years. It is important to distinguish longevity from reliability, despite the common myth, according to service practice, the number of serious failures of wall models practically does not differ from the statistics of breakdowns of floor models.
Small size. even powerful models with heating capacity over 40 kW are small and weigh up to 100 kg. Energy dependence. all models of wall hung gas boilers are energy dependent, their construction uses electronic control boards, turbine fans, servo drives and other mechanisms that require connection to the mains.
Free placement. since models with a closed combustion chamber take the air from the street, the requirements for the room for their installation is much less. It is allowed to install such boilers in the neighborhood of furniture and appliances, in t. ч. with stoves. Sensitive to changes. most models are not adapted to the unstable quality of the domestic power supply and after the next voltage drop can not run due to the failure of the control board. We always recommend installing a voltage regulator together with the boiler.
Low Some of the most budgetary options can be found and for 20-25 thousand. rubles. demanding to water quality. related to the service life of the heat exchanger, the more polluted and hard water is used as a coolant, the more often it is replaced, the more scale is formed on the walls of the heat exchanger and the more its lifetime is reduced. Part of the problem can be solved by regular flushing. Also, in almost all two-circuit models, manufacturers prohibit the use of antifreeze as the coolant.
Ease of installation. all the necessary elements of the heating system are already in the body of the boiler, which simplifies the strapping. Models with a closed combustion chamber and coaxial chimney (which is the majority) need only a small hole in the wall, there is no need for a traditional, more labor-intensive chimney. demanding to service. wall hung boilers, like floor standing boilers need regular cleaning. but much more frequent if you want to extend its service life and prevent breakdowns.
Safety. all mounted boilers are equipped in varying degrees with elements of automatic control and protection (from overheating, freezing system, blocking the circulating pump). Floor standing models are also equipped with such systems, but not budget ones.
Large selection of models. the market for wall mounted gas boilers today is much more voluminous, the competition is higher, this means that manufacturers are constantly working to improve the characteristics at a lower cost. Even approaching the choice with a long list of desired parameters there are always at least a few models to choose from.

All these advantages and disadvantages I compiled from the reviews of owners. Separately I want to say about the fact that wall heaters are energy dependent, it is not so bad. Firstly, nowadays they practically do not cut off the electricity even in the villages. Secondly, even if they turn off a couple of hours, the house will not cool down completely. And more depends on the insulation of the room, not the boiler. Third, if you are very afraid of power outages, you can buy uninterruptible power supply devices or generators. By the way, the consumption of electricity. a maximum of 80-100 kW / month.

What you need to know to select the heater

You can not just go to the store and buy a gas heating boiler. To choose the right model, you must prepare a list of requirements for the unit. determine the heat output, the necessary functions, the method of installation and other input data.

  • Calculate the amount of heat required to heat your home or apartment.
  • Define the terms of reference for the gas boiler. it should only heat the building or in addition serve as a water heater for household needs.
  • Allocate space for the installation of the heat generator. Rules allow the placement of gas-fired heating equipment in the kitchen (capacity up to 60 kW), an attached boiler room or in a separate room located along the outer wall of the house.
  • Determine how to install the boiler. floor or wall mounted. For apartments only a wall mounted version is suitable.
  • Consider the principle of your heating system. Under the gravitational scheme with natural circulation of the coolant (so-called gravity) is chosen appropriate energy-independent heater operating without electricity.
  • Set the level of automation of the device according to your wishes. Examples of useful functions: maintaining the temperature inside the premises according to the schedule or signals from an external weather sensor, remote control via the Internet, etc.
  • Estimate the price of different boilers and find out how much you are willing to spend on the purchase of a gas boiler.
choose, boiler, house

Note. Rules of placement and connection of gas-fired installations designed for heating and hot water are laid out in the publication on the installation of a two-circuit heater.

Before choosing a new or replacing an outdated gas boiler for heating a private home, it is highly recommended to consult with the customer service department of Gorgaz (or other management company). Why it is necessary:

  • In addition to general rules, in the regional offices there are internal instructions that restrict the use of gas equipment, it is worth checking these points;
  • The new or replacement boiler must necessarily be included in the design documentation, otherwise you risk getting fined for installation without approval;
  • Experts will help you properly place the heater in the house.

Clarification of internal instructions. Gorgaza often impose their own restrictions, for example, can prohibit the installation of an atmospheric boiler next to the kitchen forced air hood. The reason. the lack of compensating air flow.

Another example: you want to take a horizontal (coaxial) chimney out of the room of an apartment building, but the office will not approve this solution, because the protruding pipe spoils the appearance of the facade. To understand all the subtleties, you will need to understand the existing varieties of gas heaters, but first.

In most cases, it is better to choose and buy a wall hung gas boiler than a floor standing boiler. It remains only to decide on the price range and the manufacturer of the equipment. But not always the most reliable boiler is the most expensive. For example, the electronics of elite heat generators from Buderus, Ferroli or Vaillant can not withstand voltage jumps in our network. That is why it is necessary to choose a heater taking into account all conditions of exploitation and then to define the price category.

information on selecting a natural gas boiler is shown at

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