Double-circuit independent gas boiler. Non-volatile gas boiler

It is recommended to choose a non-volatile gas boiler for areas with unstable power supply. Modern equipment connected to the power grid often breaks down and fails due to power surges in the network. This can be a serious problem in winter time. To ensure that the heat in the house does not depend on the vagaries of electrical networks, consumers choose heating devices that operate without electricity.

What are there non-volatile boilers?

Combined non-volatile boilers, operating on two types of fuel, are only available in a floor-standing version. Gas heaters operating on gas are available in two versions:

Floor-standing. This option is more popular than the wall option. Owners of private houses prefer to install boilers that operate without electricity. The floor-standing type of equipment has a simple design and is available in a wide range of capacities. There are heaters that can heat more than 200 m². They are installed in a special room with good ventilation.
Wall-mounted. These models are chosen by consumers who cannot allocate space for a furnace. Manufacturers have recently begun to offer the market wall-mounted, non-volatile devices. They are good for their compactness, are equipped with coaxial chimneys and are in no way inferior in characteristics to their floor-standing counterparts. Wall option usually chosen for a small area.

What are the features?

Previously, if a gas heater was not connected to electrical networks, it would lose functionality and safety. A lot has changed today. Modern boilers that are independent of electrical networks have an additional device that generates electricity - it operates from the heat generated when the fuel burns. The resulting energy powers complex automatic systems, ensuring stability and safety of work.

In non-volatile systems there is no forced circulation coolant. The latter circulates under the influence of natural forces, it moves according to physical laws. If there are problems with electricity, circulation pumps cannot be used - the stability of the heater depends on the constant pressure of the coolant. There are two types of devices that operate without electricity:

single-circuit - they are bought to organize heating for a house or apartment;
double-circuit - for heating, in parallel they provide the house hot water.

Manufacturers also offer parapet models. A parapet boiler is a low-power device. It has a closed combustion chamber. Suitable for small spaces. It can be with volatile or non-volatile automation.

Principle of operation

The autonomous heater has an igniter and a main burner. The igniter is first ignited, then the main burner lights up, which heats the coolant to a temperature specified by the user. Having reached the set value, the device stops supplying fuel. As soon as the temperature drops to a critical value, the supply of gas begins, which is ignited by the burning igniter. In the absence of traction, the fuel supply is automatically stopped. The heater system, independent of electrical networks, has an expansion tank, which is necessary for the liquid that expands due to heating. Ignition is carried out using a piezoelectric element, which is activated when a button is pressed.

Advantages

The ability to work without electricity is their main advantage. There is no need to do wiring or install an outlet, this results in savings.
Simple design and safe use.
Versatility - suitable for heating houses and apartments of different sizes.
Quiet operation - no pumps creating noise.
High efficiency.
Long-lasting heat exchangers.

Flaws

It is not possible to achieve full circulation in the system. There can be many reasons, for example, calculation of pipe thickness. In such a system, it is extremely important to correctly calculate the diameter of the pipes and install them at a special angle. As a result, uneven heating of the room is possible.
For correct operation, a chimney with strong draft is required. Lack of draft will lead to equipment shutdown and the backdraft valve will operate. The chimney should create a vacuum in the firebox of 16 to 20 Pa.
The efficiency is at 90%; the average energy-dependent boiler has an efficiency of about 93%.
The temperature is controlled manually.

How to choose?

It is not so easy to choose a non-volatile boiler from a foreign or Russian production- too many brands, models, options. Imported ones are considered more economical, domestic ones are more affordable and better adapted to operating conditions. When choosing a model, you need to take into account the pressure in the gas pipeline, at what minimum pressure it can operate. specific model. Next, the power is determined - 1000 W per 10 m².

When choosing a model, it is important to pay attention to the material of the heat exchanger. There are copper, steel, cast iron. Cast iron is preferable; it is stronger than steel and has a longer service life. Heat exchangers made of cast iron can last up to 30 years. The walls of cast iron elements are thicker than those of their steel counterparts, and they are more resistant to corrosion. Another criterion that is worth paying attention to is that a device that does not depend on electricity cannot have a closed combustion chamber. Turbocharged models do not operate without electricity, as they require forced coolant circulation, air injection and exhaust gas removal.

Non-volatile or volatile - which is better?

Volatile models, unlike their non-volatile competitors, have:

Circulation pump to ensure the movement of coolant. This rules out air jams and uneven heating of rooms.
A fan for pumping outside air into the chamber of turbocharged boilers.
More advanced automation that selects the most economical modes for the device. It is possible to program the operation taking into account the time of day and days of the week. The boiler operation is controlled using internal thermostats located in the rooms.

Thanks to circulation and forced draft, less stringent requirements apply to volatile versions:

there are no strict requirements for room ventilation;
you can use a closed expansion tank, placement is free;
no need to observe slopes;
It is allowed to use pipes of small diameter.

Can a volatile heater work without electricity? No, when there is a power outage, the device does not work, and the house remains without heat. This is the only negative. There is a solution, but it requires additional costs - connecting a generator. It turns out that energy-dependent models are more advanced and convenient to use, and if there is a reliable power supply, then the choice would be clear. Non-volatile analogues are indispensable in situations where uninterrupted and high-quality power supply cannot be ensured.

Manufacturer selection

Having decided on the type of boiler - single- or double-circuit, wall-mounted or floor-standing, all that remains is to choose a brand. The reliability rating is predictably topped by German manufacturers, whose products have only one drawback - too high prices. That is why consumers often pay attention to cheaper Italian brands- , and others. But the most popular, according to sales statistics, on the market remain domestic devices - “Rostovgazoapparat”, “Mimax” KSG, Siberia KCHGO, “Wolf”, Borinskoe AOGV, AOGV and AKGV, “Premium”, ROSS AOGV. Products produced by Ukrainian factories have also proven themselves well; Atem Zhitomir is especially popular in Russia.

Model overview

Protherm Medved TLO

Floor-standing single-circuit units with an open firebox. Completely energy independent. Power range - 18–45 kW. Technical characteristics and design features of “Proterm Bear” 20 TLO:

power - 18 kW;
heating temperature (min/max) - 45–85 °C;
dimensions (HxWxD) - 880x420x671 mm
weight - 92 kg;
maximum gas flow - 1.9 m³/h;
heats an area up to 135 m²;
piezo ignition;
cast iron heat exchanger with condensation protection;
single-stage power adjustment;
“Winter” and “Summer” modes;
switching to liquefied gas is possible;
automatic microprocessor control;
Efficiency - 90%.

There is a built-in boiler for heating water. Reliable security system: there is protection against a drop in gas pressure, against overheating of water and against flame extinction. It is compact, has a stylish design, and will look good in the kitchen. Estimated cost - 55,000 rubles.

Baxi SLIM EF

Double-circuit floor version from the Baxi brand. Is different stylish design- gray body and black control panel. The burner is atmospheric. The heater device has a high-sensitivity thermocouple, which promptly stops the gas supply when the flame goes out. Connect to systems with natural coolant circulation. Their maximum power- 61 kW. Estimated price - 45,000 rubles. For example - BAXI SLIM EF 1.22:

power - 22 kW;
Maximum temperature- 95 °C;
dimensions (HxWxD) - 850x400x595 mm;
weight - 101 kg;
maximum fuel consumption - 2.64 m³/h;
heating area - 176 m².

Protherm “Cheetah” 23 MOV

Wall-mounted versions that operate without a power connection are much more modestly represented on the market. "Gepard" 23 MOV from the Proterm brand has two circuits. Weighing 31 kg, it can easily be mounted on the wall. The draft is natural, smoke removal is through a regular chimney. Approximate cost - 33,000 rubles. Characteristics and design features:

23.3 kW;
maximum gas consumption - 2.73 m³/h;
Efficiency - 90.3%;
heats an area of up to 230 m²;
primary heat exchanger - monothermal;
steel plate-type heat exchanger for hot water supply;
transition to liquefied gas.

Viadrus G36

Products from a Czech manufacturer. Steel supplied atmospheric burner. To gas valve functioned smoothly, there is a built-in thermocouple capable of creating electricity in the right quantity. There is also a sensor that prevents the rod from tipping over. Adapted to local conditions. You can connect a pump to increase the coolant pressure, and if there is a danger of power outages, connect uninterruptible source nutrition. You can also connect a boiler indirect heating. Price - about 52,000 rubles. Characteristics of Viadrus G36 BM 3:

17 kW;
heating - 45–85 °C;
one circuit;
Efficiency – 92%;
heating - 128 m²;
maximum gas consumption - 1.98 m³/h;
weight - 100 kg;
dimensions - 935x485x733 mm.

Installation features

Gas heaters that do not consume electricity operate in conventional gravity heating systems, which have a lot of disadvantages. The main ones are insufficient temperature stability in the premises and high fuel consumption. This is the fee for autonomous operation. Since there is no forced circulation, such boilers are located at the lowest points of heated buildings so that water flows to the heating site.

The heating circuit, independent of electricity, has a special layout. The pipes must be larger diameter than in the case of circulation pumps. The location of the pipes is with a slope. It is necessary to strive for the optimal number of branches and turns so that the coolant pressure does not drop below normal. An expansion tank is required: its absence can cause pipe rupture.

Non-volatile floor gas boilers- This heating equipment, capable of operating without being connected to a power source. They do not require an electrical network, which makes them possible to operate in buildings without electrification. They are also suitable for heating households in rural areas, where power outages are frequent due to worn-out electrical networks.

Advantages and features of energy-independent boilers:

Provide heat in the absence of electricity;
Simple design without unnecessary electronics;
Fully automatic operation;
No extra expenses to pay for electricity.

Non-volatile boilers are used in many Russian households. They are characterized by stable operation and do not require excessively frequent maintenance. To ignite gas, they use ignition burners, ignited using a piezo ignition system. The boilers automatically maintain a certain coolant temperature, creating a comfortable atmosphere.

Non-volatile boilers are divided into single-circuit and double-circuit. Single-circuit models are simple; they are designed only for heating rooms. Their double-circuit analogues are equipped with additional heat exchangers for preparing hot water. This eliminates the need for consumers to purchase water heaters. There is also a division into models with open and closed combustion chambers - the latter require coaxial chimneys that provide air intake and removal of combustion products at the same time. Models with open chambers are connected to traditional chimneys and require an inflow fresh air into the room.

Floor-standing, non-volatile gas boilers are available for sale in many models from Russian and foreign manufacturers. When choosing heating equipment, focus on the number of circuits, thermal power and performance DHW circuit(if available), as well as the type of heat exchanger (steel or cast iron). Non-volatile gas boilers are reliable and elegant solution for those who want to decouple heating from electrical networks and ensure its stability. Many models of these boilers can operate on liquefied gas, which makes it possible to heat buildings built far from electrical networks and gas mains.

You can buy a floor-standing gas non-volatile boiler in the Teplodvor online store. We have prepared a large catalog for our customers, which presents heating equipment from well-known brands. Delivery services are provided - throughout Moscow, the Moscow region and throughout Russia.

Imagine this situation - it’s bitterly cold outside, 30 degrees, the house has a gas boiler that requires electricity, and at this time there is a serious accident on the power line. Of course, if power outages are short-lived, then IBN saves the situation (sources uninterruptible power supply) or generators.

But the battery will run out if there is no power supply long time, and the generator requires a significant amount of fuel. What to do in this case? The problem can be easily solved. A non-volatile gas boiler is installed and a heating circuit is created in which the coolant moves under the influence of gravitational forces, i.e. by gravity.

A logical question arises - how is safety ensured and how does the automation work if such a gas boiler is installed in the house without electricity? Developers and designers have created automation that is completely energy independent and represents mechanical device, which responds to changes in coolant temperature. Most imported and domestic boilers have Italian non-volatile automation 630 EUROSIT. If precise temperature setting is required, then in boilers with a power of up to 35 kW, a multifunctional gas valve 710 MINISIT made in Italy is installed.

If the burner blows out or the gas supply stops, electromechanical protection is provided. You can find out what to do if the gas boiler is blown out by the wind. To turn on a non-volatile gas heating boiler after lighting the igniter, you need to hold the control knob for several seconds. At this moment, the thermocouple heats up, which creates an EMF of sufficient magnitude to trigger solenoid valve. As soon as the thermocouple cools down due to a loss of gas supply or other reasons, the valve will close completely.

Types of non-volatile gas boilers

The vast majority of boilers of this type are floor-standing. If the boiler is non-volatile, then it is quite logical to assume that the heating circuit should function independently of electricity. Only heating systems with natural circulation work this way, and for them the location of the boiler is important, because To create pressure you need to raise it as high as possible. In a natural circulation circuit, you can also install an energy-independent double-circuit gas boiler, which will provide the home with hot water.

In design, a floor-standing, non-volatile gas boiler is not much different from a conventional one; it has the same two burners - the ignition and the main, usually an open combustion chamber for good draft, a combustion product exhaust system (chimney or coaxial outlet) and an automation system that does not require electricity. A characteristic difference is the presence of a button for ignition using a piezoelectric element.

Floor-standing gas boilers can be single-circuit or double-circuit.

Gas boiler PROTHERM

An example is the energy-independent gas boiler Protherm, which is produced by the famous European company PROTHERM from the Czech Republic. It has been part of the German concern Vaillant Group since 2001. The Proterm Medved TLO model line is floor-standing, energy-independent gas boilers with a cast iron heat exchanger. Four models are available with powers ranging from 17 to 44 kW.

Main characteristics of PROTHERM boilers:

You can order or buy a non-volatile floor-standing gas boiler in any specialized store, but first you should calculate required power boiler and select the appropriate modification. In the PROTHERM series Bear KLZ– the only gas boiler, double-circuit, floor-standing, non-volatile, with a two-inlet heat exchanger made of cast iron with a built-in boiler. Power range from 18 to 49 kW in four modifications. The set includes two expansion tank for hot water supply and heating.

Floor-standing gas boilers of the Zhukovsky plant

Zhukovsky mechanical plant(ZhMZ) produces popular non-volatile floor-standing gas boilers with a power of 11.6 kW, which provide heating of 110 m2, and a model with a rated power of 29 kW will easily heat a home of 250 m2.

Floor-standing single-circuit gas AOGV boilers are manufactured in three main modifications:

It is important that you can buy a non-volatile floor-standing gas boiler for little money, and in return you will get a reliable heating unit that is practical and durable.

Non-volatile wall-mounted boilers

If a non-volatile wall-mounted gas boiler is installed in the heating circuit, then increased requirements for the installation of equipment should be taken into account. After all, it should ensure natural circulation of the coolant.

Main functions of wall mounted gas boiler:

In terms of their dimensions and weight, wall-mounted, non-volatile, double-circuit gas boilers are quite compact and lightweight, so their power does not exceed 35 kW. The performance of the second circuit - the DHW system - depends on the power of the boiler. Domestic water is heated in wall-mounted boilers flow method.

For normal operation, you need to ensure good draft in the chimney or coaxial outlet.

In order for non-volatile gas heating boilers to operate correctly and efficiently, you need to clearly understand and follow some rules when installing the circuit and installing the boiler.

The main requirements are as follows:

Protherm Cheetah 23 MOV

The range of mounted energy-independent boilers offered on the market is small. An example is the boiler of the famous European company Protherm Gepard 23 MOV. The boiler is double-circuit with a rated power of 23.3 kW, its efficiency is 90.3%, and the heating area is up to 230 m2. The unit weighs only 31 kg and is easily mounted on the wall of the room. The boiler is designed to operate on natural gas. You can learn more about Proterm Cheetah products.

Ferroli Domina N F24

Popular boiler produced Italian company Ferroli Domina N F24, has a power of 23.5 kW, two circuits and closed chamber combustion. It is installed on the wall and is capable of heating up to 180 m2 with an efficiency of 93%. DHW system quite productive 13.6 l/min. Dimensions 700x400x230 with a weight of 30 kg.

Unfortunately, problems in domestic electrical networks and today in the age of astronautics they are still present. In the city they are not felt so much, but in suburban villages power outages happen with enviable frequency. And anyone who solves the problem of heating their home must take this situation into account. Therefore, specialists as optimal option We recommend non-volatile gas heating boilers. Of course, taking into account the fact that there is a gas pipe in the village.

So, what is a non-volatile gas boiler? From the name itself you can understand that this unit operates offline without connecting to the network alternating current. It does not have an automation system that runs on electricity, circulation pump and others electrical devices. Many can say what heating equipment is - last century. Don’t tell me, today on the market you can buy an excellent gas boiler without any bells and whistles, which in terms of operating efficiency is not inferior to energy-dependent heating devices.

Typically, such boilers are installed in systems where the coolant moves according to the natural laws of physics. It rises by gravity from the boiler up the riser, passes through all the circuits to the heating radiators and returns back to the boiler via the return line. Heating with natural coolant circulation is not effective in all schemes, so many developers try to use a two-pipe wiring option heating pipes, where the ideal subtype is a collector interchange. So if you personally choose a non-volatile gas boiler (floor-mounted or wall-mounted), then immediately resolve the issue of piping.

Internal organization

Types and features of operation

Currently, manufacturers of this type of boiler equipment offer two types:

Wall-mounted, non-volatile gas boiler.
Floor unit.

The first option has more compact dimensions and not very high power. The second one is larger and more powerful.

It cannot be said that these devices are not automated at all. They are equipped with various sensors that react to certain processes. The only thing is that the devices connected to them only work mechanically. For example, consider design feature nozzle systems.

In such boilers, two burners with piezo ignition are usually installed (that is, ignition occurs from a battery installed inside). One burner is intended to support the wick, it is called the pilot. The second one supports the ignition process itself, it is called the main one.

The boiler has a button that must be pressed when turning on the unit.
This creates a spark that ignites the wick on the pilot burner.
But it is from this that the main burner is ignited.

Wall model

Automation

Typically, such boilers are equipped with a mechanical thermostat, which is used to set the heating mode of the coolant in the heating network. A sensor that monitors the temperature is built into the heat exchanger. As soon as the water heats up to the required temperature, a signal is sent to the thermostat, which turns off the main burner. The temperature drops below the set temperature, the main burner is ignited by the pilot. This is the simple principle of operation of energy-independent single-circuit (floor-mounted and wall-mounted) gas boilers.

If we talk about double-circuit energy-independent gas boilers, then everything is the same here, without any differences. Of course, another heat exchanger is added to its composition, which also has to be controlled. But the operating principle is the same, and even more so the principle of temperature control. The only thing that needs to be noted is the fact that in heating boilers of this type There are no models with a built-in boiler. Typically, double-circuit devices are connected to a separate tank with a heat exchanger inside, through which hot water passes, heating the water in the tank itself.

Very often, especially in boilers from foreign manufacturers, a sensor is installed in the chimney that monitors the draft. This device today is an integral part of almost all modern models. And it doesn’t matter what fuel these units run on. As they say, safety is more important than anything.

Floor model

Advantages and disadvantages

I would not like to consider this heating unit from such a point of view, but its advantages are so obvious that I would like to show consumers some of its disadvantages. You cannot display any product with only one positive side. But let's start our analysis with her.

First of all, this is the lack of electricity consumption. There are two positions here: the first is complete absence electrical appliances and devices, which means there is no need to monitor their maintenance and repairs. Second - no receipts for consumption electric current. Total savings.
There is no need to purchase and connect an uninterruptible power supply, with which you can maintain heating device in working order.
The design of non-volatile wall-mounted or floor-mounted gas heating boilers contains a small number of devices, instruments and components. Therefore, they are more compact and light weight.
Without exception, all boilers in this category have sufficient high coefficient useful action.
Easy to install and connect, much simpler than its volatile counterparts.
Presentable appearance. Manufacturers today pay everything to this criterion. more attention. Therefore, such a device will fit well into any interior. I would especially like to note wall models, which can be hung in the kitchen or bathroom.
Double-circuit floor-standing energy-independent gas boilers can provide large country houses with heat and hot water for domestic needs. They have enough power for everything.
High safety indicators.

Non-volatile boiler with boiler

Now about the disadvantages.

First of all, I would like to note that boilers of this type can operate effectively only if the pressure in the gas supply line corresponds to the product’s passport data.
A prerequisite is a well-installed chimney, which will provide the boiler with good draft.
An important requirement is well-functioning ventilation, with the help of which you will have to remove fuel combustion products from the room.
There are special requirements for such boilers, which are specified in the operating instructions for the unit. They must be followed strictly and without fail.

Having considered all the pros and cons, it is necessary to make a conclusion. If you meet all the requirements of the manufacturer and rules fire safety, then this is an excellent boiler that will work autonomously without connecting to the AC mains. And for many regions this is the optimal solution.

Don't forget to rate the article.

Choosing a gas boiler without certain knowledge about these units is difficult. There is always a risk of purchasing a device that does not meet the requirements. You have to rely on specialists. But there are risks here too - Lately There are too many “professionals” who imagine themselves to be true gurus, but do not have experience and knowledge. In this review, we will tell you how to choose non-volatile gas boilers, and at the same time we will tell you about the most popular models - they can be bought in domestic online stores.

Features of non-volatile boilers

Heating boilers are divided into two large categories - volatile and non-volatile. The first has many advantages:

More accurate temperature maintenance.
More service functions.
Possibility of working according to the program.
High level of security.

There are also disadvantages - they create additional expenses for electricity, have too fragile electronic filling, do not work in the absence of electricity.

It would seem that having a modern double-circuit boiler in your home is cool and convenient. But behind the convenience lies the need to have an auxiliary source of electricity. Such sources are generators and uninterruptible power supplies on batteries. In any case, the consumer will face additional costs for fuel and batteries.

Non-volatile heating boilers can operate without electricity. They use mechanical control systems that control the temperature of the coolant and the operation of all components. Their efficiency indicator may be lower than that of electronic models, but there are also quite energy-efficient models (such distortions are observed in all lines of heating equipment).

Advantages of non-volatile gas boilers:

No dependence on power sources - if the lights go out in the house, the heating will continue to work.
More simple internal organization– without flimsy electronics that are not resistant to power surges.
They can work for both heating and hot water supply - double-circuit gas boilers are available for sale.
Possibility of working in houses without electrification - for example, in rural areas or in the outback.

Many well-known brands are engaged in the production of non-volatile models - Protherm, Lemax, Baxi, MORA-TOP, Atem, Electrolux and many others. Both floor-mounted and wall-mounted models are available, including gas boilers with cast iron heat exchangers.

Energy-independent wall-mounted double-circuit gas boilers are rarely found on sale - most often their floor-standing analogues are presented on display cases.

Popular models

A gas boiler without electricity is smart choice for those who don't want to deal with electronics. The formula “no light - no heating” is unacceptable for many consumers, so non-volatile heating equipment was developed for them. Let's look at the most popular and rated models.

Before us is a rather powerful floor-standing sample. Its power is 35 kW, which corresponds to up to 350 sq. m of heated area. This is a non-volatile single-circuit boiler with a durable cast-iron heat exchanger, designed to work with natural gas. Its efficiency is up to 92%, maximum flow rate is up to 3.9 cubic meters. m/hour. The coolant temperature in the circuit warms up to +85 degrees.

A gas boiler does not require connection to electricity and has extremely simple controls– on its panel you can see a thermometer with a pressure gauge, as well as a knob for adjusting the heating level of the coolant. According to user reviews, the device is stable and does not require any control. The model does not highlight unpleasant odors, can operate at reduced pressure, ensures rapid achievement of the required air temperature in heated rooms.

This non-volatile boiler was created by the industry leader - Protherm. It is designed for floor installation, thermal power is 16 kW. The device can only work on one type gas fuel- This is natural gas. The heated area is up to 160 square meters. m, maximum temperature in heating circuit– up to +80 degrees. The system pressure should not exceed 1 bar.

Completely non-volatile operating scheme.
Two-pass steel heat exchanger – responsible for efficiency (up to 92.5%).
Gas failure protection.
Overheat protection.
The pressure in the gas line is up to 14 mbar.

The weight of the device is 46.5 kg.

This single-circuit floor non-volatile unit is not a boiler or a rocket - it is a gas boiler from a domestic developer. With a power of 11.6 kW, it can heat an area of up to 110 square meters. m. Thanks to its elongated shape, it is compact and suitable for installation in small boiler rooms. Small city house or country house country house building- this is the main scope of application of this unit.

The main feature of this non-volatile boiler is that it can operate on two types of gas fuel - natural and liquefied gas. In the latter case, reconfiguration related to the installation of jets will be required. Consumption natural gas is up to 1.3 cubic meters. m/hour, liquefied – up to 0.86 kg/hour. The coolant temperature in the circuit can reach +90 degrees.

Despite the Russian origin of the gas boiler, it is built on the basis of Italian Eurosit automatic equipment.

A solid non-volatile boiler from a well-known brand. Is different modern design hulls and quite good technical characteristics. The gas boiler is built according to a single-circuit design with a cast iron heat exchanger. It can run on natural gas with a consumption of up to 3.68 cubic meters. m/hour and on liquefied gas up to 2.69 cubic meters. m/hour. The model turned out to be durable; it remains operational when the pressure in the circuit increases to 4 bar.

The cast iron heat exchanger of the non-volatile gas boiler from Baxi is resistant to thermal overload and corrosion. It provides rapid heating of the coolant, and its solid heat capacity prevents its rapid cooling. The model is reliably protected from overheating, equipped with protection against gas extinction and safety valve. Its inflated price is a little confusing - on average about 50 thousand rubles. But this is Baxi - one of the most reliable brands in the world.

Before us is a non-volatile boiler, created according to double-circuit circuit. It provides not only warmth, but also hot water. The device does not require an electrical network or a traditional chimney - combustion products are removed through a coaxial chimney that extends directly beyond the wall. Automation on board: mechanical, non-volatile, different high level reliability. Thermal power the device is 10 kW, the heated area is up to 100 sq. m.

The DHW circuit in the non-volatile boiler turned out to be not the most productive - up to 3.8 l/min at ∆t=35 degrees. The pressure in the shower may be weak, but you will still be able to take hygiene procedures. The primary heat exchanger in the device is made of durable steel, secondary - made of high quality copper. This combination provides good corrosion resistance. Heating boiler type – parapet, with outlet coaxial chimney behind the wall. The ignition here is non-volatile, with batteries.

The presented gas boiler is very similar to those models that were produced back in the days Soviet Union. It is made in a round body, standing on three metal legs. The look is not the most modern - it is inherited from old times. The chimney is connected through the top central part. The operating scheme is non-volatile, with two circuits for heating and hot water. The affordable price is also pleasing, amounting to about 17 thousand rubles.

The productivity of the hot water supply circuit is low - up to 3.5 l/min, this is enough for only one consumer. Natural gas consumption does not exceed 1.76 cubic meters. m/hour, liquefied gas– 1.21 kg/hour. The maximum heated area, according to the manufacturer, is up to 200 square meters. m. It looks like highest degree strange, since the indicator does not correspond to the power of the unit and the requirements for a small margin (usually 10-20% is left).

At first glance, it may seem that this is a floor-standing water dispenser. But in fact, this is a double-circuit floor-standing energy-independent gas boiler, built according to an energy-independent scheme. It is equipped open camera combustion and steel primary heat exchanger. The secondary heat exchanger that prepares hot water is made of copper. With a unit power of 10 kW, the productivity of the DHW circuit is 4.1 l/min. The heated area is up to 100 square meters. m.

Other features of the gas boiler:

Simplest controls.
Overheat protection.
Gas control system (prevents gas leakage when the burner goes out);
Efficiency – up to 90%.
Mechanical non-volatile control.
Natural gas consumption – up to 1.11 cubic meters. m/hour.

Great model for country house or dachas.