10 best gas double-circuit boilers. Which gas boiler is better for heating a private house? What is the difference between convection boilers and condensing boilers?

What a large number of articles on this topic exist on the Internet and each of them is written directly under a carbon copy. Of course, there are many benefits to this information and it will certainly help in choosing a gas boiler for the home. But at the same time, the main secrets of acquiring a boiler are not disclosed there. But you're in luck. You will learn about them in this article. Therefore, less introduction and we proceed to the disclosure of the topic.

Comparing gas boilers, you will definitely run into the choice of floor or wall variant. And it's really hard to tell you right choice. After all, each option has its pros and cons, and each satisfies its own specific criteria. Therefore, let's divide them by importance.

Buy a wall-mounted gas boiler if:

You need more efficient work
We need all sorts of interesting modes of operation
You need compactness and a minimum of difficulties with installation
If your house does not exceed 300 square meters

Choose a floor gas boiler if:

Do you really big house or object
Longer service life is important to you (applies to cast iron boilers)
Need simplicity and stability
Do you want a non-volatile solution
Are you ready to spend money on an additional chimney and other accessories?

Double-circuit or single-circuit boilers?

This applies more to wall models. The recommendation here is simple. If you have small house with one bathroom and a kitchen, then take a double-circuit boiler and use hot water from it.

If you have several bathrooms, then choose.

The main problem of double-circuit boilers is their low productivity. At the same time, such a device can provide one point of hot water. If there are several of them, problems may arise. For example, with a suddenly cold shower. Everyone passed, everyone knows and does not want to repeat. Therefore, it is better to put a boiler.

Boiler with the best gas consumption

Comparing gas boilers with each other, you will probably ask the seller: “what gas consumption will my 100 square house with your boiler. The seller of brand X boilers will tell you that the consumption will be 5-6 cubic meters per day, and the seller of brand Y will give you a figure of 7-8 cubic meters. You are happy to buy the one in which the consumption will be less.

Do you know what will be your mistake? That you asked the question at all. Because not one seller will name the correct figure for gas consumption. Today, the realities are such that gas consumption depends not so much on the boiler, but on the heat loss of your home. And each house will have its own!

The boiler itself performs the function of compensating for heat loss. From here, remember the main thing: choosing a gas boiler in the same price segment from classmates, you will get a similar gas consumption. Now these indicators have long been equal for all brands. So you don't have to worry too much about the expense.

Which boilers have the best efficiency?

As our practice shows, a rare brand writes the truth about the efficiency of its boilers. And here's an example for you:

We have a gas boiler of the Hearth brand from the ServiceGas plant. We study the technical characteristics and see that the efficiency of their Ochag Standard boiler is 92%:

It’s just good, we think, and we go to study similar boilers and stumble upon one of the best Baxi Slim floor boilers today. We look at the efficiency and see the value of 90%.

Takes pride in the country! Our boilers are 3 times cheaper, and the productivity is also a couple of percent higher!

What is important for you to know about boiler efficiency? For wall-mounted boilers, the efficiency will always be higher than floor-mounted ones. It fluctuates around 92-93%. All wall-mounted boilers have similar efficiency. The ceiling has been reached for a long time and the difference usually differs in hundredths of a percent.

The maximum efficiency of the floor boiler is 90%. No other brand has been able to achieve a higher figure. And such an indicator is usually available only for expensive brands.

More power - more gas consumption

When choosing a gas boiler, you may often encounter the fact that there is no suitable boiler for your area. Let's say you have a house of 80 square meters, and boilers are only available from 15 kW.

An inexperienced buyer will look for boilers with a capacity of around 10 kW. Experienced will buy what he likes. After all, in fact, there is no difference with what power reserve you take a gas boiler. Your cost will be similar.

As mentioned above, the task of the boiler is to compensate for the heat loss of the house. A more powerful unit will do it just faster. And the cost will be comparable.

Aluminum or copper heat exchanger?

Among gas boilers there are models with both the first and the second heat exchanger. More often with copper. Aggressive marketing policy convinced us that nothing could be cooler than copper. In general, this is true. But few people know that the efficiency of a boiler with an aluminum heat exchanger decreases by less than 1%. Therefore, if you come across an excellent boiler, then the heat exchanger in it is not copper, this is not a reason not to buy it.

But it is worth noting that using an aluminum heat exchanger, the manufacturer is really trying to save money.

106% for condensing boilers

Sectional view of a condensing boiler

When choosing gas boilers, you may catch the eye, which are famous for their high efficiency. We talked about the device of these models in a separate article. Here we will tell you in what cases it is worth buying them.

It is important to understand the main thing - not one boiler can produce an efficiency above 100%. But manufacturers often like to write about 106% efficiency (the last figure can be anything). Therefore, you should not pay attention to this indicator. The same principle applies here as was announced earlier - all condensing boilers have a similar efficiency, higher than traditional ones, but below 100%.

condensing boiler operation diagram

You should buy them only if you use low-temperature heating systems. Such as, for example, . It is at low temperature operation that savings are achieved. In other modes, the behavior is the same as for traditional boilers.

The difference between an expensive wall-mounted boiler and a cheap one

In fact, for the main task - heating your room, you will have enough choice for your eyes to choose the most budgetary wall-mounted gas boiler of brand X than the same brand, but already from a more expensive segment. After all, their gas consumption will be exactly the same.

Everything else is not always necessary bells and whistles. Such as, additional noise insulation, energy-efficient pump, functions, fancy scoreboard, etc.

Even now, in order to save money, they began to use pipes and connections made of composite materials in cheap boilers, and metal in more expensive ones. Good or bad, time will tell.

It is important to understand one thing, if you choose a boiler for the purpose of normal home heating, then you can take at least the simplest gas unit.

This is how the material turned out. Have something to add? Write about it in the comments!

Natural gas is the cheapest energy source in Russia, so most opt for gas heating. Heat and hot water can be obtained using a gas boiler. On sale you can find a huge number of various modifications of such equipment. Some of them are suitable for heating an apartment, while others are ideal for heating a large private house. Let's try to figure out which gas boiler is better for heating different types of rooms.

Which gas boiler is better to choose depends on many factors: the weather conditions of the region, the heated area, the type of housing (apartment or a private house) etc. The main criteria by which the best boiler is determined are:

power;
the number of contours;
fastening type;
the nature of the coolant circulation;
type of combustion chamber;
type of heat source.

Consider what criteria the best gas unit should meet.

What should be the power of the gas boiler?

To heat rooms of different sizes, units of a certain capacity are needed. The required performance is calculated based on the rule - 1 kW is needed to heat 10 m². If you want to receive hot water, then the power reserve is increased by 20-30%. Also, the indicator of optimal performance may vary depending on weather conditions, thermal insulation of the house and the availability of additional systems.

The performance of a gas boiler depends on the operation of the gas burner. They can be:

single-stage;
two-stage;
modulating.

Single-stage are able to maintain fire in only one mode. Gas boilers equipped with such burners are not economical, but they are inexpensive. To save fuel and pay less for it, you should opt for a unit with a two-stage or, even better, with a modulating burner. The first option has two levels of work power, and the second has several performance steps (from 5 to 10). Modulating or multi-stage burners increase the efficiency of the boiler and significantly save gas.

Which is better - a single-circuit or double-circuit boiler?

Single-circuit gas boilers are designed for heating only. Double-circuit units are capable of producing heat and hot water. However, the volume of heated liquid produced by boilers with two circuits is often not enough. If you need a large amount of water for showering and bathing, you will have to buy an indirect heating boiler. It can be connected to both a double-circuit and a single-circuit unit. The second option is cheaper than the first. In addition, the boiler system with a single-circuit unit is more reliable and durable.

It is impossible to say unequivocally which gas boiler is better for heating - single-circuit or double-circuit. It all depends on the need for hot water and the personal preferences of the consumer.

Mount type

According to the type of fastening, gas boilers are divided into:

wall;
floor.

Wall-mounted gas units are compact in size, but their power rarely exceeds 35 kW. Thus, the most powerful mounted boilers can only heat a room up to 320 m². But they easily fit into any interior and can be hung even in a small kitchen or bathroom.

Floor-standing gas boilers are large, so you will have to look for a suitable place for them, and for models with an open combustion chamber - a separate room. Stationary units are more expensive, but they can also heat larger areas than wall-mounted counterparts.

Which is better - a floor-standing gas heating boiler or a wall-mounted one, is determined depending on the type of dwelling. To heat an apartment, especially a small area, a compact wall-mounted unit will suffice. To heat a large private house or production room, the best option is a floor gas boiler.

Natural or forced circulation of the coolant

Gas boilers differ in the type of coolant circulation. It can be natural or forced. In the first case, the coolant moves in the heating system due to the pressure that forms in it at a certain location of the boiler, radiators and expansion tank. This option is non-volatile and ideal for regions where there are frequent power outages. Such units are equipped with an atmospheric burner, so they can only be placed in a separate room with good ventilation.

In gas boilers with forced circulation, the coolant moves through a pump that runs on electricity. These units often use turbocharged gas-burners, for which a furnace device is not required. Their efficiency is much higher than that of non-volatile systems. The disadvantage of boilers with forced circulation of the coolant is that when the electricity is turned off, they will not be able to heat the room.

If in the settlement where you live, the electricity is rarely turned off, then it is better to purchase a device with forced circulation of the coolant. If the electricity is turned off frequently, then best option- system with natural movement coolant.

Features of open and closed combustion chambers

Gas boilers can be equipped with open or closed combustion chambers. The units of the first group are called atmospheric - their installation requires a separate room, since with this type of combustion chamber, the burner uses air from environment and flue gases also enter the room in which the unit is located. Boilers with an open combustion chamber require the installation of a traditional vertical chimney for the smoke to exit to the street. The efficiency of atmospheric devices is low and amounts to 76-85%.

Gas boilers with a closed combustion chamber are also called turbocharged. They do not require a separate boiler room and a classic chimney. To remove the products of combustion, it is sufficient to install a coaxial type pipe with an outlet through the wall. Turbocharged models can be placed in the hallway, pantry, kitchen or bathroom. They take combustion air not from the room, but from the street through a coaxial chimney and have a high efficiency = 88-95%.

Many are lost in the choice of which gas boiler is better for heating a house - atmospheric or turbocharged. If you are purchasing such a unit for the first time, then it is better to opt for a device with a closed combustion chamber, as it consumes fuel more economically and you can not spend money on a boiler room and a full-fledged smoke exhaust system.

If the boiler is bought to replace the old atmospheric unit into an already equipped furnace equipped with a chimney, then it will be more profitable to purchase a similar model.

Note! There are two variants in which only one type of combustion chamber can be used. The first is that in the case of installing a non-volatile system, only a device with an open chamber is suitable. The second is that only a turbocharged gas boiler is allowed to be used to heat the apartment.

What is the difference between convection boilers and condensing boilers?

By type of heat sources, gas boilers are convection (conventional) or condensing. The former use only the energy obtained from the combustion of gas. The latter, in addition to the traditional source, receive heat from the condensate that is collected on the heat exchanger.

Convection gas boilers are cheaper, more versatile and easier to manage. Condensing units are characterized by high efficiency = 96-99%, significantly save fuel, but also cost an order of magnitude more expensive.

Note! Condensing units are able to operate with maximum savings only at a coolant temperature of 50-60ºC.

Which manufacturer of gas boilers is better?

In the selection process, the consumer has a question about which manufacturer produces the best gas boilers for heating. Reviews and ratings show that the most reliable and durable are the units manufactured by the German companies Vaillant, Viessmann, Buderus. They are also leaders in the production of gas condensing boilers. Vaillant and Viessmann produce a record number of condensing units and constantly improve their technology. However, the cost of German heating devices is quite high, as is the price of their repair. Therefore, the bulk of consumers prefer gas heating boilers from Italian or Czech companies. For example, devices of the brands Baxi, Ariston, Protherm, Thermona are cheaper than their German counterparts, and are almost as good as they are in quality.

Also popular are gas boilers of domestic manufacturers Neva Lux, Lemax, Borinsky, CONORD. Of course, they are somewhat inferior to foreign models in terms of build quality and the number of additional functions, but the units Russian production affordable, unpretentious to the quality of fuel and water, and also resistant to voltage drops. In addition, for domestic products it is easier to find components and their repair will be cheaper.

The best batteries for a gas heating system

The gas heating system has features that give rise to certain requirements for radiators:

low working pressure of the coolant;
the presence of a closed circuit, due to which pressure drops and water hammer are excluded in the system;
use of high quality coolant.

Which heating batteries are best for a gas boiler? Bimetallic and cast iron must be immediately excluded. They are good for centralized system, but not for gas - cast iron heats up for too long and this significantly reduces the efficiency of the boiler, and the use bimetallic radiators in this case, it is not economically feasible. Thus, only aluminum batteries remain. They are considered the best for a gas heating system, but when choosing and installing, operational subtleties should be taken into account.

The disadvantages of aluminum radiators include:

fear of water hammer;
susceptibility to corrosion.

But in gas system both of these problems are easily solved: the presence of the first is simply excluded, and the second is solved by setting a filter on the input tap water into the boiler.

The advantages of aluminum batteries perfectly combine them with a gas unit:

able to quickly heat up and cool down;
do not require a large volume of coolant;
weigh little;
easy to install.

It is important to correctly calculate the required number of radiators. To do this, pay attention to the heat transfer of one section. It is believed that 100 W of energy is needed to heat 1 m². To compensate for certain heat losses, another 10-15% of the obtained indicator is added.

To exclude corrosive processes, it is necessary to connect the boiler and radiators using plastic pipes. When installing a heating system, it should be taken into account that aluminum is able to emit hydrogen gas - this happens when the metal reacts with oxygen-saturated water. Therefore, do not forget about installing a Mayevsky crane to remove excess gas.

As for the choice of a manufacturer of aluminum radiators, the quality of the products of Russian companies is in no way inferior to foreign ones, but they are much cheaper.

Coziness and comfort depend on the optimal temperature and humidity level. The best gas boiler, which is of paramount importance for heating a private house, will help create the necessary atmosphere. To date, there are several main classifications of devices of this kind, each of which is designed for certain conditions of use. But first of all, gas boilers must be reliable, safe and efficient, how to figure it out and get the right one will tell the rating of gas boilers from the editors of the Mark.guru portal. It takes into account customer reviews of popular models, as well as the opinion of specialists in the installation and repair of heating systems. Now a little more about how to choose the best boiler and what criteria you should pay attention to.

There is always a risk of acquiring a model that is not quite suitable, but in order to minimize this possibility, you need to calculate the purchase criteria.

Power- the basis of the basics when purchasing a boiler, the efficiency of heating the room will depend on it. As a rule, 1 kW is enough to heat 10 square meters of area, if the ceilings in the house are higher than 3 meters, a small power reserve will be required. Also, additional calculation will require double-circuit boilers, because the constant heating of water will require additional energy consumption and increased productivity.
Layout- no less important for houses with a limited area. The double-circuit boiler is designed for drainage and heating of several systems - heating and hot water supply. The single-circuit gas boilers used are installed together with a storage boiler in which water for domestic needs will be heated. It will take up extra space, and this is not always possible.
Location. A modern wall-mounted gas boiler can be compact and presentable. appearance, which will perfectly fit into the interior, for example, kitchens. As a rule, these are low-power models that are suitable for heating a house of 150 square meters. meters or less.
Safety and reliability. The best gas boilers today boast automatic operation and self-diagnosis. Computerized systems are able to select the ideal programs to heat the room at the required temperature. In the event of a fuel leak, the boiler will turn off and signal a problem to the owner. And this is far from the limit of possibilities.

Wall hung domestic boilers

it modern systems heating, which are extremely compact version boiler room. They can fit perfectly into the interior or be an addition. kitchen set. The best wall-mounted gas boilers are designed for heating private houses and cottages, and practically do not need maintenance and reconfiguration.

it reliable option for individual heating. It combines gas leakage monitoring, automatic diagnostics, protection against overheating, freezing and blocking the pump.

Power 20 kW, this is enough to heat a house of less than 200 square meters and heat water. At a temperature of 30 degrees, the performance will be a little more than 8 liters per minute. The cost of such an acquisition is about 35,000 rubles.

does not require special settings;
incredibly safe;
made of quality materials;
intuitively simple control.

Cons: not found in all stores.

Prices on :

2. MORA-TOP Meteor PK24KT

Another reliable representative of wall-mounted gas boilers up to 23 kW. Suitable for those who often use hot water, the performance of this particular boiler is quite high and at temperatures up to 35 degrees, almost 10 liters per minute are supplied. As for safety, everything is provided: protection against overheating, leakage, freezing and blocking of the pump.

This model will be the best option for those who do not plan to constantly monitor the operation of heating systems, and want to be absolutely sure of the reliability of the equipment.

The cost of such a boiler is 41500.

practically does not make noise;
economical consumption fuel and energy;
reliable and safe;
quality body materials.

Cons: does not have an exhaust fan in the design.

Prices for MORA-TOP Meteor PK24KT :

3. Bosch Gaz 6000 W WBN 6000-24 C

Modern and reliable, excellent boiler up to 24 kW for a private house or cottage.

Suitable for those who like it hotter, since domestic water can be heated up to 50 degrees, and you should not worry about good pressure, supply up to 7 liters per minute.

Outwardly, it is extremely presentable and compact, equipped with a display and electronic control type. It has auto-ignition, a built-in thermometer, as well as a self-diagnosis system and protection against overheating, freezing, fuel leakage and pump blocking. You can buy the best gas boilers of the brand at a price of about 29,000 rubles.

modern control and protection systems;
affordable price;
absolutely silent;
quickly heats water to the desired temperature.

Cons: the slightest change in conditions stops the work.

Prices on Bosch Gaz 6000 W WBN 6000-24 C:

Stylish, compact electronically controlled double-circuit gas boiler for heating a private house. It has a medium size and is ideal for heating and providing hot water for a small house. The maximum area is up to 160 square meters, since its power is 16 kW. The device can be programmed to automatically start and turn off, a large display will help you navigate the settings.

In addition, this original device is the most progressive among most budgetary wall-mounted boilers, this is due to the ability to connect underfloor heating, self-diagnosis and several degrees of protection.

The acquisition will cost 26,000 rubles.

incredibly quiet;
economical fuel consumption;
work programming;
safe.

Cons: Quite bulky.

Prices on :

5. Ariston CLAS B 24FF

Universal double-circuit boiler with built-in boiler for 40 liters. Powerful enough - 24 kW, as well as progressive in terms of hot water pressure, it can produce up to 16 liters per minute at a temperature of 35 degrees. The large display makes it easy to set the required operating parameters. The functions of auto-ignition, thermoregulation and indication will help you navigate the modes.

Protection against leaks, overheating and freezing is also present, but there is another important aspect - water filtration.

The cost of one of the best gas boilers in terms of reliability and versatility is about 80,000 rubles.

wide functionality;
several degrees of protection;
built-in boiler;
quality performance.

Cons: size and cost.

Prices for Ariston CLAS B 24 FF :

6. Bosch Gaz 4000 W ZWA 24-2 A

The best gas boilers of this brand do an excellent job of heating big houses and cottages, as the power is 24 kW. Rapid heating of water allows you to have up to 11 liters of water at the outlet with a temperature of up to 30 degrees and up to 7 at 50 degrees.

The boiler has a built-in filter, as well as the ability to connect a warm floor.

An excellent system of indication, programming and protection will help to make the work as safe and simple as possible. The cost is about 33,000.

built-in filter;
system of self-diagnostics and protection against overheating and freezing;
heating a large area;
rapid heating of water.

Cons: expensive components that are difficult to purchase.

Prices for Bosch Gaz 4000 W ZWA 24-2 A:

If you have to choose a boiler for heating without additional functions, a simple single-circuit device, then you should pay attention to this compact and attractive model.

It is suitable for large houses, as it has a power of 24 kW, and is also as easy to use as possible: it has a thermostat, auto-ignition, indication, as well as protection against overheating, freezing, pump blocking.

The device controls the level of gas supply and leakage, and also performs self-diagnostics of equipment. Excellent budget purchase at a price of 32,000 rubles.

availability;
ease of setup and management;
easy installation;
design safety.

Cons: in case of network failures and temperature changes, it can stop work.

Prices on :

This unit can be the best compact double-circuit boiler for your home.

It impresses with its simplicity and power - these are classic 24 kW, which is enough for an impressive house or cottage.

The weight of the device is 28 kg, the advantages also include a thermostat, auto-ignition, incredibly simple handling and a remote control included in the kit. The boiler has all the necessary diagnostic protection functions and copes with the issuance of 13 liters warm water per minute. The cost of a compact device is about 23,000 rubles.

low price;
convenient thoughtful management;
compact size;
attractive design.

Cons: Quite noisy.

Prices on :

Floor boilers

If you have to make a choice which boiler to purchase, floor-mounted or wall-mounted, anyone who is ready to allocate a small room for a boiler room will confidently say that floor-standing gas heating boilers have more power, they are easier to connect to warm floor as well as to the boiler. Most floor-standing boilers have a pressurized system that increases efficiency, which in turn increases the noise level, which requires the installation of a closed boiler room.

1. MORA-TOP SA 30 E

It consumes fuel economically while quickly heating the room.

It has several modes depending on the season, maintains the desired temperature. Democratic cost - 57,000 rubles.

easy to operate;
has a small size;
excellent build quality;
silent.

Cons: difficult to call modern.

Prices for MORA-TOP SA 30 E :

2. Viessmann Vitogas 100-F GS1D871

The boiler has a presentable appearance, cast iron design and an incredible power of 35 kW.

Everything is complemented by an excellent level of protection against overheating, freezing and gas leakage, which is already economically spent, saving the family budget.

Provided for connection of external control, has auto-ignition, thermoregulation and indication. But you will have to seriously pay for quality and progressiveness, and this is about 115,000 rubles.

economical fuel consumption;
low noise level;
high-quality execution of the case;
work safety.

Cons: high price.

Prices on Viessmann Vitogas 100-F GS1D871:

The ultra-modern best gas boilers of this brand fit perfectly into any interior.

High power and performance allow heating buildings up to 400 square meters.

Gas consumption is minimal and is only 3.6 cubic meters per hour. It has a maximum of functions for comfortable use, as well as a large number of degrees of protection against leaks, overheating and freezing. The cost is slightly more than 80,000 rubles.

economical fuel consumption;
attractive design;
high power;
safety.

Minuses: high level noise.

Prices on :

4. Baxi SLIM 1.300 i

A modern and compact unit that will surprise with its simplicity and efficiency. It does an excellent job of heating 300 square meters.

Owners will appreciate the economical gas consumption and the rapid increase in room temperature.

A large display will help you quickly navigate the controls, and the ability to connect a warm floor will appeal to all lovers of walking barefoot. An excellent option for a private house will cost 67,000 rubles.

safety;
simple control;
low noise level;
quickly raises the temperature.

Cons: sensitive to changes and voltage drops.

Prices for Baxi SLIM 1.300 i :

Conclusion

A reliable heating system is one of the most important components of a residential building, apart from the roof and walls. And if we choose a worthy device, it must certainly be safe, easy to manage and, if possible, economical. To help find the perfect boiler for a private home, the rating from the Mark.guru portal will help, we hope it will guide buyers in a huge range of boilers on the market.

Gas boilers are widely used heating appliances. Heat is generated by burning natural gas (methane or propane-butane), and its amount is usually sufficient to heat water for everyday use. For those people who decide to buy such a device, the question always arises as to which gas boiler is better. To make a choice, you need to know the features of these devices and their types. You can see what modern gas boilers look like in the photo.

Advantages of gas boilers

Today, gas appliances are the most common, they are used in many private homes.

There are several reasons for this popularity:

ease of operation - after installation, regular maintenance is not required Maintenance;
efficiency - gas is considered one of the cheapest sources of energy;
the possibility of automating work;
availability and variety of types - among a wide range of models, you can choose exactly the option that suits both technical specifications, as well as cost.

It is impossible to say unequivocally which gas boilers are the best, because it all depends on the situation and the needs of the owners of the house. When choosing boilers, it is necessary to pay attention to various characteristics - in this case, it will be possible to choose exactly the model that takes into account the characteristics of housing.

Power, which gas boiler is better

The main characteristic of any heating devices is power. should be done based on the area of \u200b\u200bthe house. Usually, for every 10 "squares" 1 kW of power is enough. Thus, for heating a household with an area of 100 square meters, a boiler with a capacity of 10 kW is needed.

However, such a calculation allows only approximately calculating the required power of the device, since it is also necessary to take into account the level of heat transfer and heat loss (the presence of a basement, material and wall thickness, glazing, ceiling height, quality of thermal insulation - all this affects heating efficiency). Individual needs also matter - someone feels comfortable at 20 degrees of air, and someone prefers to be in a warmer room.

If there are doubts that it will be possible to make the correct calculations on your own, then it is better to call specialists who will take into account all the features of the house.

Power regulation

The power of heating boilers can be adjusted.

Depending on the ability to control the process, gas appliances are divided into:

single-stage;
two-stage;
with smooth adjustment.

The best gas boilers are continuously adjustable - this allows you to change the power depending on the air temperature, so you can reduce gas consumption (more: "").

Single-stage heating units have only one power level, they are the cheapest. Two-stage have two degrees of power. If possible, it is better to buy more expensive boilers with two-stage or smooth adjustment - this will allow you to maintain a comfortable environment in the room.

In the case of using single-stage boilers, it will be difficult to create a cozy atmosphere in the house during the off-season - it can be hot with the boiler turned on, and cold without heating.

Wall and floor gas boilers - comparison

According to the type of fastening, there are the following types of gas boilers:

In addition, they are much easier to install than outdoor ones. However, it should be borne in mind that their power is not enough to heat a large area, and the service life is shorter due to the fact that steel or copper is used to facilitate the construction, and not cast iron.

Wall-mounted appliances gained popularity due to safety, ease of use, modern design and compact size. also in recent times wall-mounted gas boilers began to be installed not only in private houses, but also in apartments where floor structures cannot be placed (more: "").

But if the heat unit is bought for a private house, then it is advisable to stop the choice on the floor model. A comparison of gas heating boilers clearly indicates the advantages of floor appliances. They should be installed in a separate room, converted into a boiler room by creating ventilation and a chimney (in more detail: ""). As a result, heating will be highly efficient and safe.

Single-circuit and double-circuit boilers - types

As for what gas heating boilers are, there are single-circuit and double-circuit models.

If you need a large amount of hot water, then it is better to buy a boiler with a built-in boiler, having previously figured out which gas boilers are best for a private house. If you need a little water (for example, in order to wash dishes and take a shower), then best solution will be a device with a flow heat exchanger.

AT wall boilers water only heats up instantaneous water heater, the built-in boiler can only be present in floor structures. But choosing similar model, it is necessary to obtain permission for the installation and further operation of the boiler (read: ""). You can also connect an indirect water heater to the device - in this case, you can easily solve problems with hot water supply.

If we compare gas heating boilers, then it is impossible to say unequivocally which is better - single-circuit or double-circuit. To decide, you need to find out whether it is enough just to heat the house or it will not be superfluous to provide all household members with hot water.

Natural and forced circulation

Gas boilers can be natural or forced draft. In devices of the first type, the combustion chamber is open, and an atmospheric burner is also used. In these models, air is taken directly from the room, and combustion products come out due to natural draft.

Of course, such a heater requires a special room for installation so that the health of the residents of the house is not harmed.

Forced draft boilers use turbo or forced draft burners and the combustion chamber is closed. Air is taken either from another room (this option is rare) or from the street. Combustion products are removed through air ducts of small diameter using a built-in fan. Of course, such devices can be installed in any premises. Best heating boilers gas for an apartment - with forced draft.

It is believed that atmospheric burners are more practical, they work longer and quieter, but forced draft boilers do not burn oxygen in the room. Thus, it is pleasant to be in a heated room. As for forced draft burners, they are not so sensitive to pressure drops.

Condensing and convection boilers, which is the most reliable

According to the type of use of the energy received, devices are divided into two types:

convection;
condensation.

Traditional convection boilers use only the energy of gas combustion. Such models also have several advantages, despite the fact that the energy received is not fully used. These include simplicity of design, ease of installation and maintenance, low cost models.

Condensation devices also use the energy of the transition of fuel from a gaseous to a liquid state. Such boilers are more expensive than conventional units, but they have a higher efficiency. These types of gas heating boilers are equally in demand, the choice depends only on what you plan to save on - on the cost of the device or on the fuel that will be used in the future.

Since condensing boilers have a higher efficiency, they are very popular in European countries. They allow good savings on fuel, so it pays off quickly.

Ignition and thermostat features

There are boilers with electric ignition and pierro ignition. In devices with electric ignition, the start is automatic. Such models are volatile, so they are not recommended for homes that often experience power outages. The process of fuel combustion in boilers with piezo ignition is started by pressing the buttons (read also: "").

The devices can be used different types thermostats. The standard device performs only one function - it maintains the set temperature (more details: ""). Programmable thermostats have a number of additional features. For example, you can set the temperature for several days, change it according to different time days. All these features allow not only to save on fuel, but also to maintain comfort in the house.

The most expensive are devices with thermostats, which, using a special sensor, count even slight temperature fluctuations in the street and regulate the power of the unit depending on this.

Gas boiler heat exchanger material

In order for the purchased device to turn out to be of high quality and durable, when choosing, you need to pay attention to the material from which the heat exchanger is made.

The most reliable gas boiler is cast iron. Despite the fact that cast iron products are sensitive to temperature changes, they serve for at least several decades. Since cast iron boilers are heavy, they are found only in the floor version.

Steel structures have less weight, besides their cost is low. But at the same time, they are subject to corrosion, and, accordingly, they are not able to serve for a long time. For this reason, they are not the best option.

Copper boilers are resistant to corrosion, besides they can be mounted on the wall due to their low weight. Such models are considered the best - they are easier to install than cast iron, but at the same time they are durable.

Gas boiler manufacturers

Currently, there are many manufacturers of heating equipment. Therefore, it is not surprising that the question often arises as to which company a gas boiler is better. The devices of German companies (Villain and Wolf) are considered the most reliable, durable and high-quality devices, but they are quite expensive. Italian gas boilers are no less high quality, besides, they have an affordable price.

As for whether foreign technology is really better than domestic products, this is not always the case. But as far as gas boilers are concerned, there is no doubt about the correctness of this statement - imported appliances turn out to be more reliable and convenient to use.

When choosing a gas boiler, you need to pay attention not only to its price, but also to performance and quality. It is better to spend more money on a high-quality, efficient and durable boiler than to change it soon.

When choosing, consider following characteristics boilers:

material of manufacture;
the number of contours;
thermostat type and ignition method;
installation option (floor or wall);
number of power levels;
type of energy use (convection or condensing).

Most often, gas boilers are used to create an autonomous heating system in private houses; they are rare in apartments. The popularity of such equipment is primarily due to the low cost of fuel and the boilers themselves.

But at the same time, we must not forget that natural gas is a dangerous type of fuel, and for installation gas equipment you will need to obtain the appropriate permission. In addition, any natural gas heater should be placed in a separate room with good ventilation and a chimney.

In order to always be comfortable in the house, the boiler must also be equipped with a thermostat that allows you to change the degree of heating depending on the air temperature.

Which gas boiler is better, watch the video:

Each time, when choosing heating equipment, the question arises not only of choosing the characteristics of the model, but also of the manufacturer, on which the quality sometimes directly depends. This also applies to the gas heat generator. The market offers many models of various price categories, from which it is not always easy to choose a gas boiler that meets all expectations. To simplify the choice, as well as save time searching for a quality product, there is a reliability rating for gas boilers.

gas boilers

For a general idea, you need to consider the classification of gas heating equipment that exists on the market:

According to the method of natural gas combustion and removal, there are units with an open combustion chamber and a closed one.
According to the efficiency of using the heat of combustible natural gas, there are convection boilers and condensing boilers. The second type saves fuel consumption by about 15-20%, moreover, it has a higher efficiency compared to a traditional boiler.
According to the ability to heat water for the needs of hot water supply: single-circuit and double-circuit.

The first type is designed for space heating, often installed in rooms without water supply, while the second type is designed for heating and hot water supply. A double-circuit boiler saves space, but not the amount of water. In addition, it is demanding on operating conditions and equipment. A double-circuit gas boiler can be made from a single-circuit gas boiler by attaching a boiler to it. However, in this case, the volume of water supply will be limited by the capacity of the boiler, moreover, such a system will cost more than a compact two-circuit system.

By installation, boilers are wall-mounted, or suspended, and floor-mounted.

The first type is used for installation in limited areas. The floor boiler is larger, but also more powerful, designed to heat a large area up to 600 sq.m. The wall analog has a power of 35 kW and is designed for heating buildings up to 100 sq. m, because more high temperature copper heat exchanger will not withstand.

Classification of models by power.

After the choice regarding the characteristics has been made, you can proceed to the choice of a manufacturer offering quality equipment.

Rating of gas boilers in terms of reliability and quality

Floor boiler

Rating of single-circuit and double-circuit

Among single-circuit and double-circuit gas boilers there are none that would not meet modern requirements for efficiency and safety. All reliability rating models have electronic control, a power indicator, temperature controllers, a protection system - gas control, and an auto-ignition system. Among the manufacturers of single-circuit gas boilers are the following:

MORA-TOP (Czech Republic)
Buderus (Germany)
Protherm (Slovakia)
Baxi (Italy)
Bosch (Germany)
Viessmann Vitopend (Germany)

High fuel efficiency - 92%
Cast iron heat exchanger that can withstand high temperatures and has a long service life.
Electronic control function.
Gas control security system.
Compact dimensions.
Affordable price range.

There are also disadvantages, this is a low power for a floor model, as well as a modest functionality of the security system, which, however, is enough for the cost of this model.

The rating of boiler manufacturers, in addition to the above, can be supplemented by a Norwegian companyLeberg, which occupies the lead in the ranking of double-circuit gas boilers. ModelLeberg Flamme 24 ASD has a high efficiency of 96%, the maximum heat output of 20 kW will heat a house of 200 sq.m. The built-in circulation pump provides forced circulation of the coolant, and expansion tank compensate for its thermal expansion. The nominal gas pressure in the boiler corresponds to its declared capacity. The model has a wide range of comfort and safety features. Among the shortcomings, one-phase mains voltage can be noted, which is unreliable with possible power surges.

Boiler, floor standing

Rating of wall-mounted gas boilers

The reliability rating of wall-mounted boilers includes companies such asBaxi (Italy), Ariston and South Korean Navien.Comparing the three most popular models of these manufacturers, you need to consider their cost, functionality, boiler design and technical characteristics.

Baxi has long gained popularity on Russian market, where models up to 24 kW are presented. The bithermic heat exchanger of one of the popular wall-mounted gas boilers, Baxi Main Four 24F consists of copper, the model includes an automatic bypass that switches the hot water supply mode. The safety function consists of emergency overpressure relief, flame control and draft control. The boiler has an expansion tank of 6 liters to expand the heat exchanger.

The gas boiler Navien Deluxe 24K provides the maximum level of comfort and safety of operation when affordable price. The double-circuit type sequentially heats the area of \u200b\u200bthe living space up to 200 sq.m., and the DHW system provides water up to 13.8 l / min. High service life is ensured by the use of high-alloy steel in the heat exchanger. A convenient control system makes it easy to change the desired modes, and the uninterruptible power supply function eliminates breakdowns and extends the service life.

The wall-mounted boiler Ariston ALTEAS X 24 FF NG with a closed combustion chamber does not require additional ventilation. A double-circuit heating system heats the coolant up to 82 degrees, and hot water for household needs - up to 60. The model has a larger expansion tank compared to previous models. An extensive safety system includes automatic diagnostics, an overpressure valve, a boiler anti-freeze mode and much more, along with a high level of comfort.

Rating of gas floor boilers

The reliability of floor-mounted gas boilers, as well as wall-mounted ones, is determined by uninterrupted operation for as long as possible, ease of maintenance and ease of management, as well as being equipped with a good system of protection against overheating and soot formation.

In the category of floor gas boilers there are German ones. French, Italian, as well as Russian manufacturers. The domestic manufacturer is represented by models of boilers AKGV and AOGV. They are characterized by the execution with a comfortable electronic control unit, or a domestic unit, depending on the model range. Well suited for heating a private house.

Italian manufacturersBeretta, Alphatherm, Sime, already familiar Baxi and Ariston produce models for heating low-rise buildings. Models are produced both with a capacity of 15 kW and 60 kW. They are equipped with an electronic control system, circulation pump for a coolant that ensures stable operation of boilers.

The French model De Dietrich has earned a place in the reliability rating due to its high efficiency (95%), equipment with electronics that regulates the operation of equipment that is environmentally friendly and quiet. Distinctive feature boilers of this model is a heat exchanger made of eutectic cast iron, capable of providing a high level of performance at low temperatures.

German quality guarantees are represented by brands Buderus, Vaillant, Viessmann, Wolf.

Buderus is distinguished by the production of floor-standing cast-iron gas boilers with cast iron heat exchanger, which is a sign of long-term operation. Models are both open and closed type, various capacities.

Vaillant is a symbol of modern technological equipment equipped with various devices for comfortable, safe use of the heater. Each model is equipped with an LCD display, multifunctional, has a high level of environmental friendliness.

Viessmann are characterized by a long service life thanks to the heat exchanger made of gray cast iron with graphite. The equipment is not subject to power surges, pressure and voltage drops. Electronic system controls provide a high level of comfort.

Wolf manufactures cast iron and steel boilers up to 220 kW. In addition to high power, the models have the ability to operate in automatic mode, as well as the presence of a control system, high efficiency, reaching 95%.