Gas single-circuit and double-circuit parapet boilers. What is a parapet gas boiler? Pros and cons of parapet gas boilers

One way to organize an economical and very effective system for heating the house and heating hot water for domestic purposes - these are parapet gas boilers. It is also worth buying such equipment if the device is needed not for a private house, but for city apartments. Such a wide scope of use is due to their design features.

Distinctive features of parapet gas heating boilers

Line of any manufacturer this equipment will provide models with a wide power range, up to 45.0 kW. Thanks to this, buyers will be able to choose a wall-mounted gas boiler for a building with an area of up to 450 sq.m.

Installation of units of the presented type can be carried out in the most convenient place. They can be both hung on a vertical plane, and conveniently placed on the floor. An indispensable condition is to place the device near an external wall, so the chimney must be located horizontally and pass through the wall opening to the street.

All parapet gas heating boilers are made with sealed fireboxes. This means that for the fuel mixture, oxygen is taken from outside, through one of the pipes of the coaxial chimney. This feature is very convenient, as it makes it possible to mount the unit directly in a residential area.

Functionality and equipment of gas wall-mounted parapet-type boilers

The devices can be equipped with gas burners of various designs:

single stage
two-stage,
modulated.

The modes of operation are also different. There are devices only for heating, but there are models that can cook hot water to meet business and domestic needs.

The units are equipped with heat exchangers made of cast iron, copper and steel. Each of the types has its own pros and cons and should be selected based on operating conditions. For ignition of the gas apparatus, an electronic or piezoelectric ignition system is usually provided.

Advantages and disadvantages of parapet models

The positive features of the equipment are as follows:

wide scope, due to the lack of need for additional facilities;
small dimensions and weight;
very affordable cost, especially compared to other devices;
Possibility of use without a heating circuit for one room due to the presence of convection holes in the housing.

The disadvantage of heating with parapet gas boilers is the same as with other heat generators using "blue fuel": the need to obtain permission from regulatory organizations. It may take several months to agree on all the installation details, obtain a positive decision and seal the equipment.

Choosing a gas boiler for heating a home or apartment is a complex process that takes into account many factors. For example, this is the area of heated premises, the presence of a traditional chimney, the availability of free space and much more. In some situations, when there is not enough space in the dwelling, a parapet gas boiler is purchased here. It is a compact heat source with an unusual design.

Features of parapet boilers

We are all familiar with the traditional wall boilers with closed combustion chambers and coaxial chimneys. They hang on the wall, occupy a minimum of space, do without a traditional chimney, do not require a separate boiler room. Parapet modifications are also made on the basis of closed combustion chambers, but have the following characteristic features:

Floor or low wall installation;
Output of combustion products directly behind the wall (in the manner of gas convectors);
Lateral heating connection - right or left.

In addition, some parapet boilers are equipped with built-in convectors. This provides additional savings in free space - in a room where there is no place for an extra heating battery, this is important.

A parapet boiler is a device that is somewhat similar to traditional wall and floor models, only combining their advantages. It occupies a minimum of space, is available in versions with one or two circuits. Not requiring a conventional or coaxial chimney (this is always extra pipe), it removes the products of combustion beyond the wall to which it adjoins.

Parapet boilers are interesting in that the heating system is connected to them on the right or left, while in wall-mounted double-circuit models, the connection is made from below. A similar scheme is used in conventional floor models. And by purchasing a model with a built-in convector, you will provide heat for the room that is allocated for the boiler room.

Gas parapet boilers can be mounted in premises of any purpose. These can be kitchens, hallways or separate boiler rooms. Despite the use of closed combustion chambers, gas services often require the presence of an vent in the room.

Popular Models

Parapet boiler Atem Zhytomyr-M ADGV 12 CH

Our review of models starts with a non-volatile double-circuit boiler Atem Zhytomyr-M ADGV 12 CH. The power of the device is 12.5 kW, the heated area is up to 125 square meters. m. The model does not require connection to electrical network, working exclusively from the gas main. The control system here is mechanical. To work in closed circuits, it is necessary to install a separate circulation pump bypass. The maximum gas consumption is 1.38 cubic meters. m/hour.

The parapet gas boiler Atem Zhytomyr-M ADGV 12 CH is equipped with two security systems - overheating protection and gas control. The equipment can operate at a pressure in the circuit up to 2 atmospheres and at a temperature of + 60-90 degrees, while the pressure in the DHW circuit can reach up to 6 atmospheres. The performance of the DHW circuit is not the largest, only 4.83 l / min. But the efficiency of the model is quite decent - it is 90%.

Before us is another representative of gas heating equipment. Parapet boilers ROSS Premium AOGV 16PKD are made of durable steel 3 mm thick and equipped with steel heat exchangers. They are built according to a two-circuit scheme, providing hot water supply. The control system on board is mechanical; of all the measuring instruments, only a capillary thermometer is present here.

The manufacturer has done everything possible to make the ROSS Premium AOGV 16PKD parapet boilers as efficient as possible. For this, gas burners from the Italian brand Polidoro are used here, and turbulators are installed in the design of heat exchange units. The efficiency of these devices reaches 90% - this is an acceptable indicator for parapet-type boilers.

The presented unit is distinguished by its miniaturization. Its power is only 7 kW, it is designed for a building with a small area. The device is made according to a single-circuit scheme, its heat exchanger is made of steel. The gas parapet boiler consumes only 0.75 cubic meters. m / h, differing in economy - its efficiency is 92%. The maximum pressure in the pipes of the heating circuit is 2 atm. at temperatures from +60 to +80 degrees.

The provided safety systems are gas control, which prevents leakage during attenuation, as well as overheating protection, which preserves the integrity of the equipment during thermal overloads. A thermometer is provided to control the temperature on board. In the absence of a hot water circuit, it is necessary to solve the problem with the supply of hot water - the easiest way is to use an 80-100 liter boiler for this (depending on the number of people living in the house). You can also install a gas water heater.

Before us is a small-sized parapet double-circuit boiler, problem-solving with hot water preparation. It is built on a non-volatile circuit and does not require connection to the mains for its operation. The power of the model is 7 kW, gas consumption is up to 0.8 cubic meters. m/hour. It is also possible to work on liquefied gas with a consumption of up to 0.3 kg / h. Connection to heating pipes and gas pipe is made from the side.

The Danko parapet boiler heats the coolant to a temperature of +90 degrees, the maximum pressure in the system should not exceed 1.5 atm. The capacity of the DHW circuit is 160 l/h. The automation in the device is Italian, which is a sign of a long service life and the absence of problems in operation.

If the house needs not only heat, but also hot water, you should purchase a gas boiler Ochag KSGZV-10 AT. It belongs to the parapet and is endowed with two contours. Let's present the technical characteristics of the model in the form of a list:

Thermal power - 10 kW;
Heated area - 100 sq. m.;
Primary heat exchanger - steel;
Heat exchanger of the DHW circuit - copper;
The performance of the DHW circuit is 2.5 l / min.;
The pressure in the heating circuit is not higher than 1 bar.

The characteristics are not the most impressive - the pressure limit and the minimum DHW capacity are embarrassing. With such a stream of water from the tap, taking a shower will not be the most comfortable.

Compact, cute, simple - this is how we can characterize this gas unit. Its power is 12.5 kW, efficiency - up to 87%. The only heat exchanger of the boiler is made of durable steel, gas fuel consumption does not exceed 0.75 cubic meters. It does not require an electrical connection and works offline. The pressure in the heating pipes should not exceed 2 atmospheres, the maximum temperature of the coolant should not exceed +80 degrees.

The Lemax Patriot-12.5 parapet boiler is made in a neat case, to which the word “design” is applicable - the sides are slightly beveled back, so that the device is well perceived externally. The only device for monitoring operating parameters is a thermometer, it is located in the upper part of the front panel, also beveled back.

Another interesting model, characterized by maximum compactness. The manufacturer confidently declares that with a power of 12.5 kW, it is capable of heating up to 160 square meters. m. of living space. The statement is strong, but, most likely, it concerns only the off-season, when the street temperature does not drop to serious minus levels. The boiler consumes a minimum of gas fuel - a maximum of 1.39 cubic meters. m / h, pleasing the temperature in the heating circuit up to +90 degrees. But the pressure in the pipes is limited to 1.5 atm.

The gas parapet boiler Aton Compact 12.5E is made in a rectangular case, in which convection holes are visible. Along with it, analogues are on sale that differ in greater and lesser thermal power. The equipment is ideal for heating private households and summer cottages, where there is no excess free space.

This is the last device in our review. Its thermal power is 10 kW, which is enough to heat housing up to 100 square meters. m. The efficiency of the device is up to 90%, maximum flow gas fuel - 1.12 cubic meters. m/hour. The maximum pressure in the heating circuit should not exceed 1 atm. at a temperature not higher than +90 degrees. Work on liquefied gas is not possible, so the house must be connected to the gas main.

The parapet gas boiler TERMOMAX Termomax-C 10E is made in a rectangular case, devoid of any hints of design. But it is non-volatile and will work even when the power goes out.

The parapet gas boiler is a unique heating device. The chamber in which the fuel burns is located outside the heated object, and the body of the unit is indoors. Such a system eliminates the possibility of gas penetration into the house. Additionally, this makes the operation of the boiler more reliable, because the risk of breakdowns is reduced.

What is a parapet gas boiler

A parapet boiler is a device with which residential and public premises are heated. This technique is popular due to its environmental friendliness. For performance, there is no need to mount a chimney on the roof, through which soot and fumes will be removed. Instead, a coaxial device is installed - this is a special “pipe in pipe” system, where waste leaves through one hole, and oxygen is supplied through another.

Not so long ago, installations were used as a replacement for wall models. The requirements for installation are not so strict, and the functioning of the entire system is stable. Asking the question what it is - a heating parapet gas boiler, one can answer that this is a symbiosis between gas installation and convector.

This is a high efficiency equipment where the layout of the device does not affect the power rating. Due to this, this technique is suitable for heating various objects. However, a parapet boiler is best suited for a small room. It could be:

city apartment;
office;
score.

Despite the high efficiency, reaching 90%, these are quite compact units that do not imply high power.

Advantages

The positive qualities of the device are guaranteed only if you correctly approach the issue of its choice. The following advantages stand out:

parapet gas boilers are suitable for heating various objects, regardless of their purpose. In addition, there is no need to prepare a special room where it will stand;
compared with traditional gas boilers, parapet boilers have a more affordable price;
due to the compact size, there are no problems with finding an installation site;
relatively simple installation;
due to the design features, there is no need to use additional radiators for heating. The boiler itself is a functional heater;
high functionality;
it is easy to choose the power for the parameters of the room.

The only negative of the unit is that some models are completely dependent on electricity.

Important! If there are power surges, power outages in the region of residence, it is recommended to purchase a generator.

Device and principle of operation

Considering a parapet heating boiler and what it is, first of all it is necessary to note an isolated, closed combustion chamber. This is done in order to increase the safety of the installation and to reduce the combustion of oxygen. The unit is easy to maintain, inexpensive to repair and is a combination best qualities gas and convector appliances.

The internal layout looks like this:

steel case (it, when heated, gives off heat, serving as a convector);
burner;
gas valve;
sealed closed combustion chamber;
gas duct (removes carbon dioxide and takes in fresh air).

The heater works as follows. When switched on, the piezo ignition equipment ignites the pilot burner. After that, the gas moves to the main burner, as a result of which the heat exchanger heats up. From this element, the coolant tank is heated, which also plays a role in heating. Due to the installed automation, the boiler turns off the heating if the liquid temperature reaches +90 degrees Celsius. When the water cools down, the device repeats the cycle. The set temperature is maintained automatically.

Important! If there are interruptions with gas or its supply stops, the boiler turns off. If the automation fails, the equipment requires urgent repair.

A coaxial chimney is provided for the output of combustion products. Two pipes with different diameters are used: waste is removed one by one, the air necessary for combustion comes through the second.

The units also differ in appearance. There are floor and wall models - this allows you to choose the right boiler. The power of the equipment can be from 7 to 16 kW.

Note! There are double-circuit models, in which the presence of a second circuit allows you to prepare hot water (DHW system).

Installation instructions

If you neglect the installation rules, then neighbors may begin to complain, because combustion products are not only characterized by an unpleasant odor, but are also very harmful to health. If some rules are violated, the probability of failures in technology increases. To fix problems, sometimes you have to reconnect the parapet boiler, and this is an additional expense.

place - the outer wall of the house. In this case, it is necessary to adhere to the distance from the facade - from 0.3 to 3 meters (depending on the power of the selected device);
the chimney outlet should not be in a closed room, for example, an entrance, a balcony or a loggia;
in order to increase fire safety, it is recommended to process that part of the wall where the boiler will stand with non-combustible fire-resistant material;
do not install equipment nearby (minimum allowable distance - 0.2 meters) with upholstered furniture, carpets, curtains and other flammable objects;
in the room where the boiler is located, there must be a working ventilation system;
the required power depends on the volume of the heated object.

Some parapet boilers have an additional housing in which running water is heated.

Important! Thanks to the convection holes in the case, the technique is successfully used as an alternative to radiators.

Criterias of choice

To buy effective equipment, experts recommend following these tips:

if the device will be used only for heating, a single-circuit model is sufficient. The double-circuit variety allows you to prepare water for the DHW system;
it is necessary to decide where the unit will be installed, as there are wall and floor types;
the power of the plant plays a significant role. It should be noted that in double-circuit devices, almost 30% is used to heat water;
when buying, you need to visually evaluate the heat exchanger and make sure that its walls are thick enough. It depends on how long the device will last and how effective it will be. The optimal thickness is no more than 3 mm;
automation simplifies the operation of the device. Models without it have a low price, but are more difficult to manage;
if the room is not thermally insulated enough, it is better to choose a device with high efficiency;
the dimensions of the equipment are selected depending on the free space;
The installation location is also affected by the type of boiler connection (left-hand, right-hand and universal).

Note! The parapet unit is suitable for both a private house and an apartment, and it is in no way inferior to standard gas installations.

Parapet boilers are non-volatile non-volatile devices, the use of which is carried out mostly in private houses, as well as apartments, where the design does not provide for a traditional chimney. Basic distinctive feature The design of these parapet gas boilers is that they have a closed combustion chamber, which is isolated from the room where the gas boiler is located. In particular, the favorableness of this advantage can be manifested precisely in small rooms from which air will not be taken for better combustion.

The need for air intake for combustion, as well as the removal of combustion products in a parapet gas boiler, cannot be bypassed, so everything is done using the outer wall of the house, this requires the installation of a special horizontal coaxial chimney. (See also: What is the most economical gas boiler?)

The chimney consists of only a pair of pipes, they are placed one inside the other. With the help of an external tube, air enters the chamber, and due to the internal one, the products of combustion are removed. As you can see, everything is quite easy and convenient.

Another advantage that parapet gas boilers have is that they have a convection hole lining. This addition helps to ensure the heating of the room in which the gas boiler is located, without installing a special heating radiator in it.

Important Features

Boilers are manufactured as standard in a rectangular shape. This makes it possible to make their installation easier and more convenient. Also, such boilers are left or right. Boilers that are made on the left have an automatic system located on the left side of the device, and the pipes that are required in order to connect to the heating system and the hot water supply system are located on the right. The Helios gas boiler in the right version has all the same nuances, but only on the other hand. (See also: Gas boilers)

Gas boilers for heating, related to the parapet type, are produced in single-function and dual-function types. Dual-function boilers have a tubular instantaneous water heater, which is mounted in the boiler body, and is required in order to heat water for a variety of household needs. The metal used for the production of such heaters is mainly copper, since it has a fairly high thermal conductivity.

The Italian parapet gas boiler has one significant plus: due to the fact that it does not need to be connected to a chimney, it can be installed anywhere. Parapet boilers do not depend on energy. In a residential building, parapet boilers are often installed in a window sill niche. They are also used for heating buildings that have a water heating system with a forced natural circulation system.

Kerber gas boiler with a steel heat exchanger

Such boilers, which have a steel heat exchanger, do not require chimneys and can be installed in a private house, as well as in an apartment. The dimensions of the parapet boiler allow it to be mounted where it is convenient, including under the windowsill. You can connect the heating system both on the left and on the right, or simultaneously on both sides. Also, this type of boilers can operate not only on natural, but also on liquefied gas. (See also: Sitemap)

Let's define the technical design of the parapet boiler:

– Coaxial deflector with silicone seal, which ensures the tightness of the connection with the heat exchanger;

– Turbulators, which have a special design, increase the efficiency of heat transfer from combustion products to heat carriers and help to ensure a high level of efficiency, they are installed in pipes through which combustion products are discharged;

- A window with visual control over the combustion of the main and pilot burners;

- The hot water circuit is made in the form of coil-water heaters made of copper tubes with a diameter of 12 millimeters. It is intended to heat industrial water. Copper is an excellent conductor of heat, so water heats up much faster, saving time and resources. (See also: Room thermostat for gas boiler)

Boilers Siberia and Renay

Some companies may offer a series of improved parapet boilers with hermetic combustion chambers and universal connection to the heating system. Siberian gas heating boilers have rectangular heat exchangers, which are a one-piece welded body made of steel three millimeters thick. Welds are made on semi-automatic welding installations, which makes it possible to obtain high-quality uniform locks. Each seam is external and easily accessible if repairs are required. Inside the body, seamless pipes are welded through which the combustion products pass. The housing is designed to work in a heating system that operates under a pressure of 0.3 MPa.

The gas boiler Renay is characterized by the fact that it works safely and stably both with fluctuations in gas pressure in the pipeline and during low pressure. Cylindrical microflare gas burners provide a uniform distribution of the flame over the entire area of the combustion chamber, which helps to ensure rapid and uniform heating of water in the heat exchanger.

Suggested range

Concerning model range, then it includes gas boilers with a capacity of 7, 10, 12.5 and 15.5 kilowatts with one circuit and with a water heating function. Parapet boilers can be used in houses and apartments in which total area heating is up to 140 square kilometers, where there is no possibility of connection to the chimney. (See also: Advantages and disadvantages of mounted gas boilers)

Parapet gas boilers are equipped with modern gas automatic systems with piezoelectric ignition and microtorch burners. Heat exchangers of parapet boilers are made of steel having a thickness of three millimeters.

A distinctive feature of parapet models of boilers is a completely new design of heat exchangers, which makes it possible to get rid of the left-hand and right-hand versions, which makes it possible to significantly facilitate their installation. The uniqueness of the connection lies in the fact that the branch pipes for connecting the boiler to the heating system and hot water supply are removed on both sides of the device, which makes it possible to refuse side doors, which helps to save working space in the room, and parapet boilers will ideally fit into the interior of any kitchen.

During the development of new models of parapet boilers, special attention is paid to what is being improved appearance devices. The main requirements are aesthetic modern design and convenient use. Ultimately, the new parapet boilers will receive a working panel, which has devices for regulation and visual control, which is very convenient during use, as well as an original elegant appearance, which helps to distinguish this series of boilers from other Russian analogues.

A little about the design

Parapet gas boilers take in air with the help of a special horizontal pipe - coaxial, which passes through the outer wall of the house. Combustion products are discharged through it. The coaxial chimney includes two pipes located in each other. The inner one is designed to divert gas, and the outer one is for air to enter.

By type, parapet gas boilers are divided into those that have two circuits and with one circuit. In double-circuit, a flow-through water heater for a hot water supply system is included in the housing. Copper is often used as a material for heat exchangers due to its high thermal conductivity. Efficiency fluctuates around 92 percent.

Domestic parapet boilers have slightly worse characteristics than imported ones. But they may also have an electronic control system in order to automatically change the power and regulate the domestic hot water system. Also, electronic control boards can protect the boiler from overheating or freezing, pump jamming or pressure drop in the pipes.

What are the features?

A distinctive feature of these devices are closed and isolated from the premises of the combustion chamber. Due to this, the air in them, which is used for breathing, does not go into consumption for burning gas. This is especially true for small spaces. Another of the features that are suitable for the living room, kitchen and hallway is that the boilers operate almost silently.

Among the advantages of this type of equipment, one can also highlight the fact that there is a hole for convection, due to which the room is heated without heating radiators. Among the shortcomings, small capacities of such units can be distinguished, which can affect the maximum amount of space that is heated.

In conclusion, I would like to say that there are quite a few models of boilers and therefore it is worth choosing very carefully. Agree, the difference will be obvious among boilers of foreign and domestic production. It also depends on the number of contours and much more. We wish you good luck with your choice!

What is a parapet gas boiler?

Parapet gas boilers are becoming more and more popular. In this article, you will learn what a parapet gas boiler is.

Parapet gas boilers

The heating system with the participation of a gas boiler is one of the most affordable and profitable. But not everyone has the opportunity to refuse centralized heating, even if its quality is unsatisfactory. This is due to the fact that a conventional stationary gas boiler needs a flue.

Such a structure is not present in all buildings, especially multi-storey ones. Residents of private houses and cottages have long enjoyed all the advantages of heating gas boilers, now residents of apartments have such an opportunity. Which gas boiler is better to choose?

What is a parapet boiler?

Parapet gas boilers are units designed for space heating, as well as providing them hot water. Design features such equipment is very well suited for safe operation at home. The power of parapet units varies from 15 to 45 kW, this is enough for heating and hot water supply of an apartment or house, but it all depends on the size of the heated area, heat loss and the minimum air temperature outside the window. To choose the right gas heating unit, it is necessary to take into account all these factors.

Parapet boilers can be mounted independently, you just need to follow the installation instructions.

The main differences and characteristics of a gas parapet boiler

Parapet boilers are non-volatile units.
One of the differences between a parapet boiler and a stationary gas unit is the design of the fuel combustion chamber. The parapet gas boiler has a closed-type combustion chamber, which ensures the complete removal of combustion products outside the room in which it is installed.

The combustion of oxygen in the room is also excluded, which is an important factor for small areas with poor ventilation. This design of the combustion chamber provides better fuel combustion, which increases the efficiency of the entire heating system.

In connection with the use of a closed type combustion chamber, there is no need to install bulky gas ducts. This is suitable for those who do not have the opportunity to build such structures.
According to its characteristics and structural features parapet boilers are very similar to mounted gas boilers. But the latter are very "capricious" in their operation, despite their popularity. For stable and durable operation of the wall-mounted unit, constant pressure maintenance in the circulation system, high gas quality, soft water and other nuances are required.

To simplify the operational requirements, parapet boilers were developed, which, despite their versatility, are picky in operation, but some of the requirements specified in the unit's passport must still be met.

There are special convection holes in the body of the parapet boiler, which provide heating of the room even without installing additional radiators. Thus, this multifunctional unit combines the functions of a "heater" and a "radiator" at the same time.
Varieties of parapet boilers in terms of functionality can be: single-circuit - capable of providing only space heating, double-circuit - provide heating and hot water at the same time.
The parapet gas boiler can be operated from a gas cylinder with a propane-butane mixture, as well as from a gas pipeline with natural gas.

The design of a gas parapet boiler

The body of the parapet boiler may have various sizes, design and shape.
Installation of this unit can be made in any convenient place. Can be hung on the wall or placed on the floor.
Equipped with a closed type combustion chamber.
can be installed different types burners, which are mainly divided into single-level, two-level and modulating.
The heat exchanger of a parapet gas boiler can also be various kinds: cast iron, steel or copper. Each of the heat exchangers has a number of advantages and disadvantages.
The flue gas extraction system is a coaxial chimney.
For ignition, a piezo or an electronic ignition system can be used.
To ensure complete autonomous and safe operation of the heating system, a variety of electronic sensors and programs are used.
To control the normal operation of the unit, as well as the settings of the operating modes, the device is equipped with the necessary controllers.

The chimney goes outside the room through a hole in the wall, this pipe performs the function of removing combustion products, as well as supplying air, which is involved in the combustion process.

Coaxial chimney - these are two pipes different diameter. The smaller diameter pipe runs inside the larger diameter pipe. Flue gases exit through the inner channel, and fresh air is taken in through the outer channel.

Advantages of a parapet gas boiler

Drawing a conclusion on the characteristics of this unit, we can note its positive points:

Possibility of use in premises of any purpose and even in apartments, without the construction of additional structures.
Low cost compared to other types of gas boilers.
Compact size and easy installation.
A design feature that allows you to heat the room where the parapet boiler is located without the use of additional radiators, that is, the boiler itself is a heater due to the presence of convection holes.
Multifunctionality and a wide range of capacities.

Despite the simplicity of design and operation, parapet boilers are gas equipment, which has clear requirements that must be met.

To do right choice gas heating boiler for the house, you need to take into account the heated area and heat loss. To do this, you need to take 2 kW of boiler power per 10 m2 of the area of \u200b\u200bthe house.

A parapet boiler is a versatile and convenient unit for heating, which can be installed even in an apartment.

Parapet gas boilers: advantages and disadvantages

What are parapet gas boilers. Features of installation and operation of parapet gas boilers.

Parapet gas boiler

What is good parapet gas boiler? Consumer reviews point to its compact size, ease of use and versatility. This type of heating devices is recommended for installation in rooms with a small area. For example, in a standard city apartment, it will not take up much space in the kitchen under the window. You can place a parapet boiler in living quarters without looking back, since it does not use oxygen to burn gas from the room. A perfect smoke removal system makes this technique absolutely safe to use. Read also: Which is better - a single-circuit or double-circuit outdoor gas boiler».

Typical variety of equipment

The parapet boiler takes up very little space.

How to choose the right parapet boiler? Consumer reviews indicate the variety of models of this heating equipment. Today, the choice of device can be carried out according to the following parameters:

according to the method of installation: wall and floor, left-hand and right-hand;
by the number of circuits: single and double circuit;
by the presence of automation: volatile and non-volatile.

In addition, the classification of equipment is carried out according to its performance. So, today you can buy a single-circuit gas parapet boiler with a capacity of 15 kW to 40 kW. When choosing a double-circuit parapet gas boiler and reading its instructions, you will notice that water performance is also added to the usual power. So, a device with a power of 12 kW-13 kW can heat up to 180 liters of water per hour, which is enough for 4 water intake points.

By the number of contours, one and double-circuit boilers. The first option is equipped with a conventional heat exchanger. It has a lamellar structure, which increases the rate of heat exchange between the flame of a gas burner and the heat carrier of the heating system. The heat exchanger is made of steel, 3 mm thick. It is this structural material that ensures the durability of the equipment and a sufficiently high rate of heat transfer. Increasing the thickness of the steel reduces the degree of exchange of thermal energy between the water in the heating circuit and the gas burner.

Construction of a parapet boiler.

The double-circuit parapet gas boiler is equipped with an additional copper coil. Due to his work, water is prepared for the DHW circuit of an apartment or house. Water heating is carried out only in a flowing way. The storage capacity inside the boiler will significantly increase the dimensions of the equipment. So use it for mounting in ordinary apartment will be impossible.

According to the method of installation, there are wall and floor models. However, the classification of parapet devices does not end there. There are boilers with a left-hand arrangement of branch pipes for connecting a gas main, a heat and hot water circuit. There are also right hand ones. When buying equipment, it is necessary not to lose sight of this fact. Read also: How to choose a wall-mounted gas boiler for home».

Dimensions and dimensions directly depend on the performance of the boiler and the number of circuits. So, a single-circuit gas parapet boiler will be smaller and lighter compared to a similar device equipped with two circuits. If we compare two single-circuit boilers, then the one whose performance is higher will be larger. This is due to the size of the gas burner and heat exchanger.

How to install a chimney for a gas boiler without errors?

All about aluminum chimneys for gas boilers can be found here.

How is a parapet boiler arranged?

There is a coil inside.

The body of the parapet boiler is made of steel with a minimum thickness of 3 mm. Powder coating on the outer and inner sides of the body makes it resistant to corrosion. Even under conditions high humidity, which is often observed in the kitchen, the gas heating element will retain a decent appearance and integrity. Thick steel increases the resistance of the instrument case to direct mechanical impact. On its surface, dents and chipped paint are not formed.

The device of a parapet gas boiler is simple and efficient. The structure of the equipment is as follows:

steel case;
closed combustion chamber;
igniter and gas burner;
coaxial chimney;
a steel heat exchanger, if it is a double-circuit equipment - a secondary copper coil.

The security system is presented:

Gas boilers floor parapet structure do not differ from wall counterparts. The difference is only in the power of the equipment. With increasing power, the weight and dimensions of the device increase.

Installation of a parapet gas boiler can be carried out in any convenient place in the building. The main requirement is that the equipment must be located close to the wall in order to bring the coaxial chimney to the street. The main advantage of parapet heating elements is a closed combustion chamber and a coaxial chimney. These two structural elements allow you to mount the device in any convenient place without fear for human health. After all, a sealed combustion chamber does not allow toxic products of gas oxidation to penetrate into the living quarters.

The coaxial chimney is a steel structure consisting of two pipes. One of them with a smaller diameter is located inside a pipe with a larger diameter. Free space is formed between pipes of different diameters. Through this space, wall and floor parapet gas boilers take in air for burning gas. Oxidation products of the energy carrier go out through the inner pipe. As a result of the operation of the boiler, no air is taken from the room. That is why parapet heaters do not need a separate boiler room with good ventilation.

Do-it-yourself installation of a parapet gas boiler is strictly prohibited. Only licensed professionals should install the device. Only employees of the gas service should connect the device to the gas main.

Installation of a parapet boiler is carried out in the same way gas convector . The coaxial chimney is brought out through the wall. Wind protection is a must! Next, the installation of the gas duct pipes, the heating and water supply circuit is carried out.

How does a boiler work?

The movement of flows and the name of structural elements.

If non-volatile equipment was purchased, then its operation begins with the piezo ignition button. As a result, the igniter or the primary burner of the boiler starts to burn. If the equipment is volatile, that is, equipped with automation, it is put into operation using automation. However, non-volatile models are more common in the domestic market due to their versatility.

The principle of operation of a parapet gas boiler is very simple. The igniter ignites the main burner. Its flame is directed to the heat exchanger through which the heat carrier of the heating circuit circulates. The burner operates until the coolant temperature reaches the upper critical level. After that, the automatic heating element is activated. The gas valve is closed. As a result, the gas burner goes out, while the igniter continues to work. As soon as the temperature of the heat carrier in the heating circuit drops to the lower limit, the gas valve will resume the supply of energy to the burner. The latter will ignite from a working igniter. The water in the heat exchanger will start to heat up again.

Responsible for the safety of the boiler are several structural elements:

firstly, it is a thermocouple, which is located in the flame of a gas burner;
secondly, boilers are equipped with an element for controlling the presence of traction;
thirdly, there is a thermostat with a thermometer.

Buying a parapet gas boiler? The instruction is the document on which the choice should be based. The instructions contain information regarding the power of the device, the rules for its installation and operation.

The thermocouple from the heat of the burner generates an electric current of low voltage. It is supplied to the gas valve and keeps it in the open position. If the flame inside the boiler goes out for some reason, the thermocouple stops generating electricity. The valve closes automatically. The gas supply is stopped.

Sectional wall-mounted parapet gas boiler (rear view).

If there is no draft in the boiler, then the main structural element safety device(plate) – raises its temperature to +65°C. The signal from it goes to the gas supply valve. The latter closes and the gas burner stops working. A similar mechanism is typical for a non-volatile boiler. If the equipment is connected to the mains, then the traction control is under the control of automation.

A thermostat with a thermometer protects the boiler from overheating. As soon as the thermometer detects a critically high temperature of the coolant in the heating circuit, it transmits a signal to the thermostat. The latter also stops the gas supply to the gas burner.

The wall-mounted parapet gas boiler once competed with conventional wall-mounted heating elements despite their versatility. So, the latter were very demanding on the gas pressure in the gas pipeline, scale often formed on their heat exchanger, they needed uninterrupted power supply. Parapet devices are not so demanding on the pressure in the gas pipeline. Non-volatile models do not need power supply. Their coaxial chimney can be mounted both vertically and horizontally, which expands the possibilities of their installation.

Why the arrangement of chimneys for boilers is of the utmost importance when assembling a heating circuit.

What are the options for chimneys for gas boilers? The answer is here.

Possible problems with this type of gas equipment

Formation of ice on the chimney.

Parapet gas boilers for heating can create several problems for their owners. First, their sealed chamber consists of two structural elements that are interconnected by a porous, thermally resistant polymer-based material. If Maintenance the boiler is carried out at the wrong time, you may not notice how the thermoplastic will lose its tightness. Carbon monoxide and other poisonous constituents of the exhaust gas can enter the living area and cause poisoning. That is why timely maintenance of parapet boilers is a must.

Secondly, the coaxial chimney in inexpensive models is made of steel of ordinary grades. At the same time, the rules for the operation of gas equipment require that only stainless steel be used when creating chimneys. Otherwise, soot and condensate accumulating on the walls of the chimney can form a chemically active environment.

It eats through steel walls. carbon monoxide from inner pipe enters the air flow to gas burner. As a result, there is not enough oxygen in the gas chamber for the full combustion of the energy carrier. Equipment performance drops. Soot forms on the walls of the boiler, which accelerates the corrosion process.

Thirdly, with coaxial chimney there is always a danger of blowing out the flame of the burner by strong gusts of wind. That is why, when installing the device, in without fail install wind protection.

How justified is the use of parapet boilers?

The parapet boiler can be placed on the floor, right in front of the battery.

Parapet boilers today can compete with similar full-fledged gas-fired heating devices. After all, parapet equipment is different compact size and dimensions, is not inferior to conventional boilers in terms of performance. The main advantage of parapet appliances is the presence of a closed combustion chamber and a coaxial chimney. This allows the device to be placed in living rooms. The chimney can be placed both vertically and horizontally, which gives even more freedom in terms of placement of heating equipment.

The equipment can work both as a heating boiler and in parallel as a conventional convector. In addition, the equipment is able to serve the DHW circuit. The advantages of the equipment include their durability, efficiency, long service life, safety in use. The thermocouple, draft control and coolant temperature are responsible for the quality of the last parameter. TO possible problems include the poor quality of the coaxial pipe, untimely service, blowing out the burner flame with strong gusts of wind.

Parapet gas boiler, reviews, specifications

What is a parapet gas boiler for heating? Equipment reviews. Device and principle of operation, classification of equipment. Wall and floor models.

How to choose a parapet type gas boiler?

Natural gas can safely be called the most popular and comfortable view fuel for use in autonomous heating systems of private houses, since, unlike coal, you do not need to take care of regular replenishment of supplies, you just need to connect to the local gas pipeline. That is why the largest number of individual heating systems are designed to use gas. One of the best options is a parapet gas boiler, which can also be used to heat a city apartment.

Such a boiler can be used to heat a city apartment

Initially, such boilers were developed as an alternative to wall-mounted ones, which, despite the fact that they had a lot of advantages, were very demanding on operating conditions. For stable operation, they needed stable pressure, high quality gas, soft water and uninterrupted power supply. For this reason, they often failed and needed regular maintenance. after-sales service. Therefore, over time, they were replaced by parapet boilers, which have not such stringent operational requirements and ensure more stable operation of the entire heating system.

The parapet boiler is a non-volatile heating installation, designed for installation in private houses and apartments, combining the positive qualities of gas boilers and convectors.

Boiler device

Parapet boilers have a closed combustion chamber, which does not communicate with the room in which the unit is installed, and does not emit combustion products into its atmosphere, which is of great importance for small rooms with weak ventilation systems. For the same reason, such boilers do not require the creation of a traditional chimney, only a lateral coaxial (coaxial) chimney is sufficient, which is mounted from two pipes located in each other to supply fresh air to the combustion chamber and output combustion products to the outside. Due to the presence of holes in the body of the parapet boiler, it is not necessary to install additional radiators in the room. With the correct calculation and choice of the boiler model, it alone will be enough for full heating.

Parapet boiler device

Parapet gas boilers are mounted according to the same principle as convectors - by means of nozzles, the unit is connected to the gas and water supply systems, if the boiler is double-circuit, and is attached to the wall with brackets. The coaxial chimney has a small diameter and can be laid directly into outer wall, on which the unit itself is located. The branch pipe is best displayed next to the window, so that it is easier to control its condition during the operation of the heating system.

Main advantages

The main advantage of a parapet boiler is the already mentioned closed combustion chamber. Thanks to this design device, there is no need to install a full-fledged chimney, so the boiler can be installed in any room in which at least one of the walls is external.
The presence of convection holes in the boiler body provides full heating of the entire room without the need to install additional convectors, since the parapet boiler is both an “oven” and a “battery”, combining all the positive aspects of these devices.
Possibility of installation in a city apartment. All that is required for a parapet boiler is the presence of a gas pipeline and electricity in the house. In apartments, the installation of parapet boilers is usually carried out in the window sill space in the kitchen, but if there is none, the unit can also be installed near the wall, but in this case it will be necessary to create an external hole in it for a coaxial chimney.

The heater can be installed simply against the wall

A wide range of parapet boilers allows you to choose best option for any space. Power can vary from 15 to 40 kW, depending on the model chosen.
Versatility. Among the model range there are options with both one and two circuits. A parapet boiler with two circuits not only heats the room, but can also be used to heat water if there is no hot water supply in the house.
For an individual heating system, parapet boilers have a relatively low cost, which makes them affordable for most segments of the population. Modern design does not damage the hull general form interior if the unit is installed in a conspicuous place.

Choosing a gas boiler

Between themselves, parapet boilers, in addition to specifications and power, can differ in efficiency and reliability.

Reliability primarily depends on how thick the steel is used in the design of the heat exchanger. Unfortunately, not all manufacturers indicate this parameter, therefore, when choosing a boiler, you need to clarify this point with the seller in a separate order, since this can play a key role in the operation of a parapet boiler.

Steel with a thickness of around three millimeters is considered optimal. If the steel is thicker, then the heat transfer process will slow down, which will negatively affect the overall efficiency of space heating. In addition to the thickness of the steel, its quality also matters. The quality of the metal and the entire boiler as a whole can be determined by the maximum level of pressure that is allowed by the manufacturer. The higher it is, the more reliable and better the selected parapet boiler is made.

The quality of the metal during manufacture can be determined by the maximum level of pressure

The efficiency of a parapet boiler is affected by the design of the heat exchanger and its efficiency. In order to determine how economical the selected boiler will be in operation, you need to find out its efficiency (coefficient useful action), this parameter will most accurately show the efficiency of the heat exchanger and the boiler device as a whole.

To date, almost all manufacturers have achieved an acceptable level of efficiency, which is 90-92%. But just in case, it is worth clarifying the level of efficiency when buying, since in some cases even two or three percent can matter. This indicator is the only one that objectively reflects the efficiency of the boiler, because different rooms differ from each other in the level of their own thermal insulation, so the reviews of people who have already bought a boiler will always be subjective.

Significant technical parameters include the size, dimensions of the boiler, the location of the connectors for connection and power. The size and dimensions are selected in each case individually and depend on the place and conditions of installation. Also important for the boiler is the location of the connectors. The modern model range includes options with both right and left connection of the boiler to gas and water supply. There are also universal models that can be connected from either side.

Boilers are various dimensions, it all depends on the power

The power of a parapet boiler is no less important characteristic than its efficiency. It is from the choice of a model with optimal power that the quality of space heating, as well as the efficiency of using the boiler, will depend, because if it is too powerful, then gas and electricity will be wasted. The formula 1 kW per 10 m 2 is often used, but in fact this is not correct, since this indicator is so averaged that it almost never corresponds to reality. When calculating the power of 1 kW per 10 m 2, the difference between an apartment and a house, the number of windows in the room, wall material, ceiling height and other parameters that make up the overall level of thermal insulation are not taken into account.

It is best to double this formula, that is, take 2 kW of power for 10 m 2, and not one. In this case, a margin is obtained that takes into account windows, possible drafts, thin walls or high ceilings. But, of course, it is best to consult with specialists when buying and determine the optimal power of the boiler on an individual basis in order to achieve the most optimal ratio of price and quality of heating.

The parapet boiler is economical, easy to operate, has a low cost, can serve as a water heater and does not require the creation of an additional heating network, since it is both a stove and a convector. The ease of installation allows you to connect the parapet boiler yourself, without resorting to the help of specialists.

Summing up, we can say that a parapet boiler is a convenient modern heating device that can be installed in any type of premises, in a private house, apartment, garage or any outbuilding.

Parapet gas boiler: design and principle of operation

A parapet gas boiler is a heating device using gas energy, most adapted for use in residential premises. What are the advantages of parapet boilers, and what is needed

The arrangement of an autonomous heating system requires a careful approach to the choice of all equipment. If the pipes are incorrectly selected, the coolant can circulate at a speed violation, a lack or excess of radiators will lead to poor heating or waste of thermal energy. It is equally important to choose the right heating unit. With a gas line optimal choice– gas parapet boiler. The model is characterized by small dimensions, ease of installation, ease of operation, maintainability and other advantages. Consider the features and characteristics of the product.

What are parapet gas boilers and their device

The main difference between a parapet gas boiler and devices of this type is non-volatility. The incoming fuel is burned by igniting the burner in a closed chamber, the smoke and combustion products are removed through a coaxial chimney.

On a note! The technique combines all the advantages of a traditional gas boiler and convectors. It does not require forced air, therefore it is suitable for arranging an autonomous heating network.

Structural scheme consists of a set of basic and additional elements:

igniter;
closed compartment (chamber) of gas combustion;
burners;
steel heat exchanger in a single-circuit device;
heat exchanger and secondary type copper coil in a double-circuit model;
coaxial flue.

The unit is enclosed in a durable steel case, equipped with a security system, which includes thrust sensors, a thermocouple, a thermometer.

On a note! There are no structural differences between the floor and wall models; the amount of free space is taken into account when choosing. The parapet gas boiler is an autonomous equipment with a high degree of safety, practical and convenient for heating a house up to 150 m2.

Features of parapet boilers:

The coaxial chimney pipe is a double system. The chimney works for air intake to create a gas-air mixture that burns in a closed chamber, and for the removal of combustion products.
The special design of the burner provides increased efficiency of parapet models.
The absence of forced blowing is a property that allows you to create a non-volatile autonomous network in the house. This is especially important for buildings located outside the city.
The convection principle of operation of the device provides fast warming up of rooms. Efficiency of heating by perforation of the steel case is achieved, thermal energy is transferred directly to air flows, thereby increasing the efficiency of the equipment.
The sealed combustion chamber minimizes the risk of combustion products escaping, so people in the house are protected from gas poisoning.

Important! For ease of use, it is more profitable to buy double-circuit boilers. In this case, the heat exchanger supplies hot water to the main, the copper coil to the DHW distribution. A drive will have to be built into a network with a single-circuit boiler, but only if the device has sufficient power.

Advantages and disadvantages of parapet boilers

In addition to the fact that a double-circuit parapet gas boiler will provide heat and hot water in the house, the devices have a number of additional advantages.

Experts highlight the following advantages of acquiring single- and double-circuit models:

No restrictions on the location of the device. Only the proximity of the outer wall is required, through which the coaxial type chimney will have to be led out, the usual chimney will not come in handy.
The small size of the device. The parapet model can be placed in the kitchen or in the bathroom of a private house, if one of the walls is external. The boiler body is supplemented with perforation, so there is no need for an additional heat source in the installation area (room). The device serves as a kind of oven, warms up both the room in which it is installed and other rooms of the house.
Versatility. There are no restrictions on the installation of units, if there are installation conditions, the devices are installed in private houses, apartments of multi-storey residential buildings.
Having a choice. On sale are single-, double-circuit models with a power of 15-40 kW. The most productive units are designed to heat houses with a living area of up to 200 m2.

Affordable cost is one of the main advantages of the models. Compared to standard equipment, parapet boilers are 30-45% cheaper. Minus one - the devices are not designed for heating large rooms. When choosing boilers with a power of 20 kW, suitable for heating more than 100-150 m2, care must be taken to thoroughly insulate the building. Otherwise, an additional heating source will be needed.

Rules for choosing parapet gas boilers

Before buying, the user should decide on the type of model - wall or floor, calculate the heated area, assess the degree of insulation of the object.

Equipment is selected taking into account the nuances:

The thickness of the walls of the heat exchanger. Steel must be at least 3 mm thick, otherwise, due to the slowdown of thermal processes, the efficiency of the device is reduced.
Operating pressure indicator. The parameter is specified in the technical data sheet, it must be higher than 4–5 bar. The larger the number, the better the steel of the heat exchanger.
efficiency. The optimal size is from 92%. The efficiency and performance of the device depends on the indicator.
Dimensions. The compact wall-mounted gas parapet boiler does not limit the installation area, the models are placed in the kitchen, bathroom and other premises. Floor-mounted ones require free access to the equipment, which means that there must be at least 30 cm of space from the device case to the nearest equipment.
Connection type. On sale are models with a side, bottom connection.
Power. This is an important setting. With a low power of the device, thermal energy will not be enough, with an excess, the unit will not work at full capacity, which will lead to rapid wear of the equipment.

Advice! To calculate the power, the area of \u200b\u200bthe room is divided by 10, the final figure means the number of kW. For example, for houses of 50 m2, a boiler with a power of 5 kW is needed. The parameter is averaged, therefore, with poor insulation, severe winters, an extensive network, another 35–50% is added.

Overview of the best models of units and manufacturers

The market offers a large selection of boilers from Korean, Russian, European and Chinese manufacturers. European boilers are considered to be of higher quality, but their cost often exceeds the capabilities of users.

Navien. This is a Korean company that provides a wide range of equipment and spare parts.
Lemax, RF. Quality equipment at a low cost.
Artem, Ukraine. Reliable models with an affordable price level.
Vaillant, Germany. Elite class technology. It is expensive, practical and easy to use.
Baxi, Italy. The quality of the brand is not lower than that of the German manufacturer, the price is much lower.

As for the model range, the choice is also quite wide:

Zhitomir-M, Artem (Ukraine). Marking ADGV-15, efficiency 92%, cost from $ 300 (20,000 rubles).
Slim 2.300Fi, Baxi (Italy). Double-circuit parapet gas boiler with a power of up to 30 kW, suitable for heating an area of 160 m2. The price is $2200 (140 thousand rubles).
Thermomax. Models marked C 12E are suitable for rooms up to 110 m2. Efficiency 90%. Price from $250 (17,000 rubles).

On a note! Units are available in different price category, which depends on the technical characteristics of the devices.

Problems of parapet boilers and possible methods for their solution

The main difficulties arise with chimneys and combustion chambers. Models with low cost have steel coaxial chimneys that are prone to corrosion. Due to the accumulation of soot on the inner walls of the pipe, condensation forms, and this leads to rust. The centers of corrosion thin out, corrode the metal, which is why carbon monoxide ceases to be drawn out completely, enters the combustion chamber.

The lack of oxygen will reduce the efficiency of the device, the user will receive less heat while increasing fuel costs. The way out is to replace the pipe during operation or buy units with a coaxial stainless steel chimney - this material resists corrosion.

Advice! To prevent the flame of the burner from blowing out during gusts of wind, it is recommended to install a protective cap on the top of the chimney. If the cap is not included, it is made in the form of a cone from a sheet of galvanized steel. Fixing to the casing with press washers or rivets.

The problem with the combustion chamber arises from the loss of tightness of the thermoplastic that connects the 2 parts of the chamber. Loss of tightness will lead to the release of carbon monoxide, their penetration into the room. Regular maintenance of the gas unit will help to avoid poisoning.