How to choose parapet gas boilers for heating a private house. How to choose a parapet type gas boiler? What is the difference between a parapet gas boiler and a regular one?

Requirements governing connection gas equipment, so high that in some cases, installation is impossible for a number of reasons. A parapet gas boiler has an operating principle that is different from its classic counterparts. Changes in internal structure, somewhat reduce the connection requirements, which makes installation possible, even in apartments of multi-storey buildings.

Installation of a parapet gas heating boiler

The internal structure of the parapet gas equipment was designed in such a way as to prevent the combustion of oxygen from the room in which the boiler is installed. For this purpose, several design changes were implemented. As a result of the modifications, a gas-fired boiler was obtained, characterized by the following characteristics:
The internal structure and operation of a parapet boiler are in many ways similar to what is used in units of a classical design. But there are differences that make it possible to widely use the equipment.

How does a parapet boiler differ from a chimney boiler?

A non-volatile parapet gas boiler is a unit closed type. Gas combustion and all other processes occur in a completely sealed closed combustion chamber. The main difference from classic units is several characteristics:

• Lack of a classic chimney pipe. In classic boilers, air is taken directly from the room. After burning the gas, the combustion products go into the vertical chimney under the influence of natural draft. In parapet equipment, air intake and combustion products removal occur using a coaxial chimney pipe.
• The special design of the combustion chamber - a steel heat exchanger, two burners, a DHW coil, are enclosed in a sealed chamber connected to a coaxial chimney. Air is taken in along the outer contour of the chimney pipe, after which it enters the burner from below. The heated air passes through a vertical heat exchanger and is discharged from the boiler body through the core of the coaxial pipe.

The normal volume of gas consumption for a 10 kW parapet boiler will be about 1 m³/hour. A double-circuit unit will consume approximately 15-20% more fuel required to heat the hot water supply.

Which parapet boiler is better to choose?

When choosing any model of heating boiler, they are guided by its thermal characteristics and additional functions. The performance of the unit, the possibility of heating water for domestic needs, as well as the plant that manufactures the heating equipment are taken into account:

• Productivity - average power indicators, calculated using the formula 1 kW = 10 m². This formula is suitable for well-insulated buildings in the middle regions of the Russian Federation with a ceiling height of no more than 2.7 m.
• Functionality - parapet single-circuit gas boiler, works only for heating. To connect hot water supply, you will need to install an indirect heating boiler, which will require additional financial costs. Double-circuit parapet gas boilers, are convenient in this regard, as they have a built-in water heating function and a switch that allows you to switch the unit to summer or winter mode work.
• Manufacturer - the ranking of the most reliable boilers is led by German manufacturers, Austrian and Czech models follow immediately behind them. Domestic parapet gas boilers, with a closed combustion chamber, have an attractive price and good thermal characteristics.

Judging by the reviews, best manufacturers gas parapet heating boilers are European and Russian companies. Although the products of the latter are somewhat inferior to their European counterparts in terms of efficiency and degree of automation, they are fully adapted to domestic operating conditions and are sold at an affordable price. Models manufactured by factories located in neighboring countries are popular:

• Domestic gas parapet boilers of Russian production - Lemax, Hephaestus, Barsky Machine-Building Plant, Helios, Danko, Conord, HeatLine, Taganrog Gazoapparat,
• Ukrainian gas heating boilers parapet type, for apartments and private houses - Termomax, ATON, Atem, Mimax, Termotechnik, Mayak, Dani, Proskurov, ROSS, Ochag.

The cost of parapet boilers, Ukrainian and Russian manufacturers, 2-3 times cheaper than European analogues.

How to install a parapet heating boiler

When installing a parapet boiler, the following must be observed: technical specifications and requirements that apply to the room where gas equipment will be installed, a connected chimney, etc. The installation procedure and rules are stipulated in SNiP 31-02-2001, SNiP II-35-76, SNiP 42-01-2002 and SP 41-104-2000 DBN V.2.5-20-2001. Installation of parapet gas boilers in a private house is allowed or apartment multi-storey building. At the same time, the premises must correspond minimum requirements, stipulated in the above regulatory documents. During installation, you must strictly follow the installation procedure and rules.

Requirements for placement under a parapet boiler

Installation restrictions stipulate the minimum dimensions and height of the room used for the needs of the boiler room. Additionally, requirements related to lighting, type of ventilation, etc. are described:

• Parapet boilers up to 30 kW can be installed indoors with a total area of ​​up to 7.5-8 m². It is allowed to use the kitchen and utility rooms for needs.
• The minimum ceiling height is at least 2.2 m.
• Ventilation of the room - the boiler room must have working supply and exhaust ventilation. Doors are installed without thresholds. Opening windows are required.
• Lighting - for every 1 m³ of the boiler room, there must be at least 0.03 m² of window opening.
• Features of operation - maintenance of gas equipment is carried out at least once a year. Along with the operability of the boiler, the operation is checked supply and exhaust ventilation. A report is drawn up on the inspection performed.
• Commissioning of the boiler is possible only after inspection by a representative of the supervisory authorities, compliance with all requirements regarding correct connection gas equipment.

Chimney for parapet boiler

It is impossible to connect a parapet boiler to a traditional vertical chimney. The internal design makes it possible to connect exclusively to a coaxial pipe. When simultaneously connecting several gas boilers at once, the use of a vertical coaxial chimney is allowed. Correct connection to a horizontal chimney must meet several requirements:

1. The horizontal section should not exceed 3 m in total.
2. When passing floor slabs, a special block is used - cutting.
3. A condensate trap and wind protection are installed on the chimney head.
4. The chimney is installed at a slight slope from the boiler to prevent condensation from draining into the device.

The pipe for removing combustion products through the wall is made of plastic or stainless steel. Low temperature exhaust gases, makes it possible to install any type of chimney you like. Real experience has shown that it is more practical to install a stainless steel coaxial pipe.

How to protect a parapet boiler from the wind

Parapet models, installed properly, work almost flawlessly. Blowing out of the boiler indicates the presence of violations when connecting the chimney, incorrect settings of the automation and other problems. If the intensity of the shutdown is more than once every several heating seasons, you will need to eliminate the source of the malfunction. The reasons why a gas parapet boiler may go out are the following :

• There is no wind protection on the chimney head. The factory-made casing already has a special insert that protects from gusts of wind. The protection can be made from any galvanized steel, attaching it to the casing with press washers or rivets.
• The settings are set incorrectly - in order to prevent the parapet boiler from blowing out, you will need to lower the permissible gas pressure at which the module will remain operational.
• Insufficient draft intensity - the gas duct is designed in such a way that the slightest disturbance in the draft characteristics will lead to the boiler shutting down. To eliminate problems, check the correctness of the chimney connection and correct any mistakes.

To prevent possible boiler shutdowns as a result of gusts of wind, it is better to entrust the installation of the unit to a qualified specialist licensed to carry out this work.

Weaknesses and strengths of parapet-type boilers

Feedback from owners about parapet gas heating boilers allowed us to compile a small list of advantages and disadvantages of heating equipment of this type:

• Disadvantages - parapet models have low power and are not designed for heating large areas. Boilers are suitable exclusively for heating small private houses and apartments. The equipment is sensitive to errors made during the installation of a coaxial chimney.
• Pros - compact size and the ability to choose a boiler with the required connection side to the heating system. The models are distinguished by their low cost, energy efficiency and efficiency, ranging from 98-100%. Closed combustion chamber and absence negative influence on the microclimate of the heated room, reduce the requirements for their installation.

You can find out some of the pros and cons personally by examining reviews from customers with real operating experience. Judging by the technical characteristics, the advantages of parapet equipment are still greater, and the disadvantages are mainly associated with improper installation.

Parapet type boilers are economical, reliable and are very popular among domestic consumers.

avtonomnoeteplo.ru

How to choose a parapet type gas boiler?

• Boiler structure
• Main advantages
• Choosing a gas boiler

Natural gas can safely be called the most popular and convenient type of fuel for use in autonomous heating systems of private homes, since, unlike coal, you do not need to worry about regular replenishment of reserves, you just need to connect to the local gas pipeline. That is why greatest number 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 many advantages, were very demanding in terms of 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 required regular maintenance. Therefore, over time, they were replaced by parapet boilers, which have less stringent operational requirements and ensure more stable operation of the entire heating system.

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

Boiler structure

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 side coaxial (coaxial) one is sufficient, which is mounted from two pipes located inside each other to supply fresh air into the combustion chamber and removal of combustion products outside. Due to the presence of holes in the body of the parapet boiler, there is no need to install additional radiators in the room. With the correct calculation and choice of boiler model, one will be enough for full heating.

Parapet boiler design

Parapet gas boilers are installed according to the same principle as convectors - the unit is connected to the gas and water supply systems through pipes, 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 external wall, on which the unit itself is located. It is best to install the pipe next to the window to make it easier to monitor its condition during 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 ensures full heating of the entire room without the need to install additional convectors, since the parapet boiler is both a “furnace” and a “battery”, combining all the positive aspects of these devices.
• Possibility of installation in a city apartment. All that a parapet boiler requires 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 heating device can be installed simply against the wall

• Wide the lineup parapet boilers allows you to choose best option for a room of any size. Power can vary from 15 to 40 kW, depending on the selected model.
• 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.
• For individual system Parapet heating boilers have a relatively low cost, which makes them accessible to most segments of the population. Modern design the housing does not spoil the overall appearance of the interior if the unit is installed in a visible place.

Choosing a gas boiler

Between themselves parapet boilers, in addition technical characteristics and power, may differ in efficiency and reliability.

Reliability primarily depends on the thickness of the steel used in the design of the heat exchanger. Unfortunately, not all manufacturers indicate this parameter, so when choosing a boiler you need to clarify this point with the seller separately, as this can play a key role in the operation of the parapet boiler.

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

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

The efficiency of a parapet boiler is influenced 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 (efficiency factor), 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’s worth checking the efficiency level when purchasing, since in some cases two or three percent can make a difference. This indicator is the only one that will objectively reflect the efficiency of the boiler, because different rooms differ from each other in the level of their own thermal insulation, so reviews from people who have already bought a boiler will always be subjective.

Significant technical parameters include the size, dimensions of the boiler, location of connection connectors and power. The size and dimensions are selected individually in each case and depend on the location and installation conditions. 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 any side.

Boilers come in different sizes, it all depends on the power

The power of the parapet boiler is no less than important characteristic than its efficiency. The quality of room heating, as well as the efficiency of using the boiler, will depend on the choice of a model with optimal power, because if it is too powerful, gas and electricity will be wasted. The formula 1 kW per 10 m2 is often used, but in fact this is not correct, since this indicator is averaged so much that it almost never corresponds to reality. When calculating a power of 1 kW per 10 m2, 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, for 10 m2 take 2 kW of power, and not one. In this case, a margin is obtained that takes into account windows, possible drafts, thin walls or high ceilings of the room. But, of course, it is best to consult with specialists when purchasing and determine the optimal boiler power individually in order to achieve the most optimal price-quality ratio for heating.

A parapet boiler is economical, easy to use, has a low cost, can perform the functions of 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 the help of specialists.

To summarize, 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.

What do you need to know when choosing a gas convector?

klivent.biz

Parapet gas boilers: advantages and disadvantages

The parapet boiler takes up very little space

Compact parapet gas boiler - perfect solution For country house, cottage, townhouse or city apartment. Its design allows you to abandon the arrangement of a gas duct, and does not require a significant area for placement necessary equipment. And the closed type of combustion makes the use of such heating equipment absolutely safe even when installed in residential premises or kitchen space.

Like other types of boilers, this option is focused both on working exclusively with the heating system and on additional connection of hot water supply - in this case you need to choose a double-circuit model. Moreover, the device itself generates heat during operation and can be used as a convector in the room where it is installed. A parapet gas boiler can be non-volatile - with mechanical start and piezo ignition, or volatile - with automatic control. The second option is focused mainly on cottages and private houses. The first one is universal and can be used both in apartments and at individual residential construction sites.

Features and Specifications

Sectional wall-mounted parapet gas boiler (rear view)

Unlike many other models of heating equipment, a parapet gas boiler does not burn oxygen when generating heat, which is especially important in winter period. And its connection does not require the installation of complex communication systems - it is enough to have a wall suitable for arranging a hole intended for the output of a coaxial pipe. Through it, exhaust gases are removed and air is taken in.

The obvious advantage of this type of design is the wide selection of models with different types of mounting (floor-mounted, wall-mounted) - in this case, parapet gas boilers can be installed even in small spaces. And the availability of opportunities to connect to both main gas pipeline systems and gas cylinders, filled with a propane-butane mixture, allows them to be used even in those regions and areas where the central gas supply is absent or not well established.

The types of burners used in boiler equipment may also be different. Most models use single or two-level options. Parapet gas boilers are equipped with heat exchange elements made of copper, cast iron or steel; in double-circuit systems, the additional coil is almost always copper.

The power of boiler equipment is one of its main parameters. Most household models are capable of delivering performance up to 16 kW. It is worth considering that 1 kW of heating system power can provide heat to approximately 10 m2 of the area of ​​a house or apartment. And for dual-circuit models, power indicators should be calculated with an increase of 30%. Efficiency also matters - here you should not be content with little, the higher it is, the lower the fuel consumption will be.

Advantages of parapet gas heating systems

A parapet boiler can be placed on the floor, directly in front of the radiator.

Due to the peculiarities of its design, a parapet boiler is a completely adequate alternative to electric or main heating systems in apartment buildings, and when installed on the territory of a private residential property, it copes with heating an area of ​​up to 160 m2 (with appropriate equipment power). In addition, he has a number of completely obvious advantages, making the use of gas equipment even more attractive:

1. Affordable: the cheapest models with a small power reserve cost just over 10,000 rubles, the most powerful - up to 100,000.
2. Installation is possible in any room with external walls - from storage rooms and hallways to living rooms, kitchens and living rooms.
3. Flow-through water heating (in dual-circuit models) allows for a productivity of up to 180 l/hour, and is adapted for output to 4 water intake points. Thus, you can refuse to install a drive, which significantly increases the area occupied heating equipment, and does not create difficulties with the seasonal use of hot water supply.
4. Economical - costs gas heating always lower than wood or electric, with similar efficiency.
5. Safe - built-in control systems, both in mechanical and automatic equipment, ensure that the gas supply is stopped in the event of emergency situations. And the sealed housing of the combustion chamber prevents combustion products from entering living spaces - they are quickly discharged outside through a coaxial pipe.
6. Demonstrates a high heating rate of coolants and is undemanding to the quality of water in pipes and supplied gas.
7. There are no additional requirements for seasonal use.

Of course, these are not the only advantages that a parapet boiler has. But it also has some features that require separate consideration. For example, to legally install such equipment in a house or apartment, it is necessary to obtain approval from the gas service and draw up a connection project (if we are talking about a main gas supply) to the source of energy supply. If connected to bottled gas, it is also better to install and connect the parapet boiler under the supervision of specialists.

How is the chimney constructed?

Parapet boilers are equipped with coaxial-type chimneys, but can also be connected to existing pipes leading to the roof of the house. In this case, air is taken in for the operation of the system directly in the house, through ventilation grilles. But this connection option is the exception rather than the rule. In most cases, chimneys are installed directly in the wall near which the equipment is installed. And brought out through the hole in load-bearing structure building, the pipe has a double structure, in which combustion products are discharged through an internal chimney of a smaller diameter, and air from the street is supplied along the external circuit, providing the necessary flow of oxygen into the system. Such parapet boilers are completely autonomous, and the installation of a chimney to them can be done both in a vertical and horizontal plane.

Parapet gas boiler: design and principle of operation

Connection and operation

Parapet boilers need to meet certain operational requirements. In particular, they cannot be mounted directly to the wall without providing it with additional thermal protection from steel sheets or plates. You should not place objects that pose an increased fire hazard in close proximity (at a distance of less than 30 cm) to gas boiler equipment. These include curtains and curtains, pieces of furniture with soft upholstery, polymer decorative structures.

The minimum distance from the wall at which installation is possible is 30 cm, the maximum is 2.5 m. Thus, parapet boilers can be installed in almost any room - from boiler rooms and storage rooms to living rooms. Wall-mounted models are attached directly to the wall surface, and are usually characterized by low power - they are most often chosen for organizing autonomous heating in apartments or townhouses.

Absence natural ventilation indoors is a direct contraindication to installing a parapet-type heating system. Air circulation in space, even when it comes to the operation of closed systems, is important in ensuring safety.

When choosing a location for the chimney, it is better to give preference to the section of the wall located under the window opening. In this case, maintenance or dismantling will be much easier. The chimney pipe should be installed at an angle to ensure condensate drainage. And wind protection should be installed on the outer edge of the pipe, otherwise the flame in the burner may go out if there are strong gusts.

A parapet gas boiler is a unique heating device. The chamber in which the fuel burns is located outside the heated object, and the unit body is located indoors. This system eliminates the possibility of gases entering 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 used to heat residential and public spaces. This technique is popular due to its environmental friendliness. To make it work, there is no need to install 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 is discharged through one hole, and oxygen is supplied through another.

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

This is highly efficient equipment, where the device layout does not affect the power rating. Thanks 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;
• shop.

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

Advantages

The positive qualities of the device are guaranteed only if you choose the right one. The following advantages are highlighted:

• 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 compact sizes no problems finding an installation location;
• 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’s easy to select the power to suit the room parameters.

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

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

Design and principle of operation

When considering a parapet heating boiler and what it is, first of all it is necessary to note the isolated, closed combustion chamber. This is done to increase the safety of the installation and to reduce oxygen combustion. 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 body (when heated, it gives off heat, serving as a convector);
• burner;
• gas valve;
• hermetically sealed combustion chamber;
• flue (discharges carbon dioxide and takes in fresh air).

The heating device operates as follows. When switched on, the equipment ignites the pilot burner using piezo ignition. The gas then moves to the main burner, causing the heat exchanger to heat up. This element heats the coolant tank, 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, the device repeats the cycle. The set temperature is maintained automatically.

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

A coaxial chimney is provided to remove combustion products. Two pipes with different diameters are used: one removes waste, the second brings air necessary for combustion.

The units also differ appearance. There are floor-mounted and wall-mounted models - this allows you to choose the appropriate boiler. Equipment power can be from 7 to 16 kW.

Note! There are dual-circuit models in which the presence of a second circuit allows the preparation of hot water (DHW system).

Installation instructions

If you neglect the installation rules, your neighbors may begin to complain, because combustion products are not only characteristic unpleasant smell, but also very harmful to health. If certain rules are violated, the likelihood of technical failures increases. To correct problems, sometimes you have to reconnect the parapet boiler, and this is an additional expense.

• place - outer wall Houses. In this case, it is necessary to maintain a 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 indoors, for example, at the entrance, balcony or loggia;
• to increase fire safety, it is recommended to treat the part of the wall where the boiler will stand with non-flammable fire-resistant material;
• equipment must not be installed nearby (minimum permissible distance is 0.2 meters) with upholstered furniture, carpets, curtains and other flammable items;
• there must be a working ventilation system in the room where the boiler is located;
• the required power depends on the volume of the heated object.

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

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

Criterias of choice

To buy effective equipment, experts recommend adhering to the following tips:

• if the device will be used only for heating, a single-circuit model is sufficient. The double-circuit version allows you to prepare water for the hot water supply system;
• it is necessary to decide where the unit will be installed, since there are wall-mounted and floor-mounted types;
• The power of the installation plays a significant role. It should be taken into account that in double-circuit devices almost 30% is used to heat water;
• When purchasing, you need to visually evaluate the heat exchanger and make sure that its walls are thick enough. This determines how long the device will last and how effective it will be. The optimal thickness is no more than 3 mm;
• automation simplifies working with 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-handed, right-handed 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.

Not all owners have any idea what a parapet gas boiler is, although many have been using it for a long time. This is a non-volatile unit, without connection to the chimney of a house or apartment. A gas parapet boiler removes combustion products through a coaxial chimney passed through the wall of the building. The presence of a closed fuel (gas) combustion chamber makes it possible to install such units in small rooms, since oxygen is not taken from the room for the gas combustion process.

Advantages and features of parapet units

The main advantage of the equipment is its compactness: a parapet boiler running on gas can easily fit in the kitchen under a window sill or in any other room, since during operation it does not consume oxygen from the room and does not pose a danger to residents. A coaxial chimney is a reliable and safe smoke removal system, which also offers a choice in favor of such equipment.

The correct choice of product should be based on the following parameters (except for consumer reviews and catalogs from selling companies):

1. Installation technology: the parapet boiler is made for mounting on walls and floors; there are also left- and right-hand models;
2. A gas parapet boiler can be equipped with one or two circuits. One circuit is for heating only, the second circuit is for domestic hot water;
3. Also, parapet boilers can be energy-dependent (with automatic system monitoring, adjustment and control) and non-volatile (with or without manual adjustment).

The thermal power possessed by parapet boilers varies between 15 kW-40 kW for a unit with one circuit. If you choose to install parapet equipment with two water heating circuits, then the capacity for heating water for domestic needs should also be added to the rated power. For example, parapet boilers with a power of 12 kW -15 kW easily heat the volume of water up to 180 l/h, which, according to the standards, is four water points (faucets, toilets, faucets, showers, etc.).

1. The single-circuit unit has a standard heat exchanger (jacket) of a plate design, which speeds up the process of heat exchange between the gas burner and the working fluid of the heating system. The material of the shirt is thick 3 mm steel.
2. Double-circuit gas parapet boilers contain, in addition to the heat exchanger, a copper or brass coil for hot water supply, in which water is heated only by the flow method. If you increase the productivity of hot water supply due to an additional tank for hot water, then such a boiler will no longer be able to be installed in the kitchen.

Also, in addition to wall and floor models, there are products with a difference in installation: with left-hand connection gas pipe, hot water supply and heating circuits, and right-handed. This convenience should not be overlooked when choosing a boiler for an apartment or house. The dimensions of the unit are determined by its performance and the number of water heating circuits. For example, if a boiler has one circuit, then its dimensions will be smaller than that of a double-circuit one.

Parapet equipment installation

The body of the unit is painted with fire-resistant powder anti-corrosion paint, which saves it from working in the kitchen. high humidity and metal rusting. The thick 3-mm casing (not a casing, but the casing of the working unit) is resistant to mechanical stress.

The equipment is simple but effective:

1. Thick-walled metal case;
2. Closed combustion chamber;
3. Gas burner and ignition;
4. Chimney of coaxial type;
5. Metal jacket (heat exchanger), if there is a second circuit - a copper or brass coil.

Automatic monitoring and control group:

1. Thermometer;
2. Thermocouple (temperature sensor);
3. Air draft sensor.

Self-installation parapet equipment is impossible - this must be done by representatives of the gas service after the owner has received the appropriate permits. The unit can be installed anywhere. The main thing is that the boiler should be located next to the wall - this way the coaxial chimney will be short and safer. The main advantage of parapet gas boilers is a closed combustion chamber and a coaxial chimney pipe, which can be installed anywhere in the room. These two components allow the boiler to be installed anywhere in the room, without fear for the safety and health of the residents, since neither the sealed closed combustion chamber nor the autonomous chimney allows toxic gases to enter the atmosphere of residential premises.

The chimney pipe of a coaxial device is metal structure from two pipes of different diameters. A pipe of smaller diameter is inserted into a pipe of larger diameter, and the free space between them serves to draw air into the combustion chamber. Combustion products are discharged out through a pipe with a smaller diameter.

Do-it-yourself installation of a parapet gas boiler is strictly prohibited. Engage in installation and commissioning works gas equipment must be installed by licensed professionals, and only employees of the regional gas service have the right to connect the parapet gas boiler to the gas main.

The process of installing gas parapet equipment is similar to installing a gas convector: the smoke removal system of a coaxial chimney is led through the wall of a house or apartment to the street, and the end of the pipe must be protected by a windproof cap so that a gust of strong wind does not extinguish the wick. Then the gas, heating and hot water circuit pipes are installed in the same way.

How does a boiler work?

The non-volatile gas boiler is equipped with piezoelectric ignition - for this there is a special button on its body. The wick lights up and ignites the gas burner.

When an automation system is installed in the equipment, the boiler is ignited automatically, depending on the sensor readings. More reliable, versatile and easy to operate are energy-independent models of gas parapet boilers, which is why they are more popular in the domestic market.

Parapet gas equipment operates using a simple and understandable technology: it is ignited from the wick gas-burner boiler and heats the heat exchanger, through which, using circulation pump or natural current moves the working fluid. The gas will burn until the water temperature in the heating system reaches the level set by manual or automatic regulators, after which the gas is automatically turned off by closing the gas valve at the inlet to the boiler. The wick is working at this time and is ready to re-ignite the burner at any time as soon as the water temperature in the system drops below the specified parameters and a command to heat up is received.

The gas boiler safety group consists of the following components and elements:

1. Thermocouple, which is installed directly in the burner flame;
2. The traction control sensor is installed at the combustion chamber outlet;
3. Temperature sensor and thermometer.

What is a thermocouple used for: under the influence of heat from the burner flame, it generates a small voltage that controls the position of the gas valve. If combustion in the chamber stops, the voltage in the thermocouple disappears and the valve automatically closes, cutting off the flow of gas into the boiler.

In the absence of air draft in the boiler, the heat exchanger quickly heats up to +65°C and above. The signal from the heat exchanger plate is sent to the gas supply valve, it closes and combustion ends. This is how the safety group of a non-volatile boiler works. If the boiler is connected to the electrical network, then all processes are controlled by a control and automation system.

A thermometer paired with a temperature sensor (thermostat) serves to protect the parapet boiler from elevated temperatures. The mechanism works like this: when the thermometer detects a critically high temperature of the working fluid in the system, it sends a command to the thermostat, which closes the gas supply to the boiler burner.

Wall-mounted parapet gas equipment is in even greater demand than conventional floor standing boilers with a chimney installed in the building due to its versatility and undemanding operating parameters. For example, conventional wall-mounted units react sensitively to changes in gas pressure in the line; because of this, scale appears on the boiler jacket more often; in addition, such units require an uninterrupted supply of electricity.

Parapet gas boilers are less sensitive to pressure changes in gas supply pipes, and non-volatile equipment does not require connection to the electrical network at all. The coaxial type chimney is undemanding in terms of installation conditions: it can be installed both horizontally and vertically, which gives scope for a more convenient location of the boiler in small rooms.

Problems and solutions with parapet gas equipment

Despite all the safety measures provided and control over the operation of gas equipment, parapet units can create problems:

1. Camera closed combustion made of two elements connected to each other polymer materials. If the maintenance schedule is not followed, the polymer layer may begin to deteriorate. , which will lead to the leakage of toxic combustion products into residential premises;
2. The material of coaxial chimney pipes in cheap models of parapet units can be made of black steel, which quickly burns out. Remember one mandatory GOST requirement: in all models of gas parapet boilers, the coaxial chimney must be made only of stainless steel. If the pipes are made of ordinary steel, then soot and condensation quickly accumulate on them, air draft slows down, corrosion eats away at the metal, and all toxins can easily enter the room. In addition, carbon monoxide from the chimney, entering the combustion chamber through the cracks of the chimney, can extinguish the burner or reduce its burning power;
3. With the walls of a coaxial chimney damaged by corrosion, the danger of the flame being blown out by gusts of wind increases significantly, which means that the gas in pure form will seep into living spaces. This means only one thing - wind protection of the chimney is mandatory, as is checking the material from which the parapet pipe is made.

A parapet gas boiler is a device with a hermetically insulated combustion chamber, which is used to heat the coolant and water in the hot water system. He carries out the fence clean air and removal of combustion products outside the premises, excluding emission carbon monoxide to the boiler room.

Features of the device

The body of such equipment has a rectangular shape, which adds convenience during installation, and the method of its mounting can be left, right or universal (double-sided).

The most popular are parapet boilers, whose power does not exceed 15 kW, although on the plumbing market there are more powerful samples designed for 35 kW or more.

Difference from analogues

At the time of development, boilers with convectors were conceived as a replacement for wall-mounted equipment for a similar purpose. After all, their predecessors require frequent maintenance, they are capricious and require high quality gas.

It is believed that the new kind heating equipment is less demanding to operate and does not require frequent maintenance. In addition, there is no connection to the chimney, which is a significant advantage and makes it possible to install it in any convenient room that has an external wall.

Installation location

In most cases, the parapet boiler is fixed in a niche under the window, where the radiator is usually placed. The main difference from wall-mounted and floor-mounted devices is the power range, installation method and output channel equipment. Currently, such a unit is a convector and a gas boiler at the same time, and can be installed not only in country houses, but also in apartment buildings.

The only thing worth remembering is that the device is completely energy dependent, because its operation will require a continuous supply of electricity. In this, it is completely similar to similar turbocharged devices designed to operate in a heating system with forced circulation of energy.

Device structure

Due to the design features and type of purpose, such devices have firmly occupied the niche of the most popular elements heating system. Their design allows the unit to be used universally in various conditions.

Outlines

Parapet boilers, like most of these units, can be single-circuit or double-circuit, so they do an excellent job of heating water for household needs where there is no hot water supply, and do this simultaneously with their main purpose.

Chimney

For the normal functioning of the device, it is not necessary to have a vertical chimney, since the process of removing combustion products is carried out through a through hole in the wall.

Such a coaxial chimney consists of two pipes that are connected to each other. One of them is responsible for supplying oxygen, and the other for removing carbon monoxide to the outside.

Convector

The convector integrated into the boiler body allows you to do without additional installation of radiators and other heating devices, if this does not upset the thermal balance.

In order to create a comfortable indoor microclimate, it is necessary to choose the right parapet boiler, having previously familiarized yourself with its technical characteristics.

Main advantages

Having become familiar with the design features a little heating device and the scope of its application, one can determine the main advantages that it has:

• closed combustion chamber and, as a result, the possibility of installation anywhere;
• the presence of convection holes, thanks to which you can do without additional installation of convectors;
• power sources are gas and electricity, which means the device can be installed in city apartments;
• a large selection of models with a power range from 15 to 40 kW, which makes selection easier for rooms of different sizes;
• availability of single-circuit and double-circuit boilers;
• modern design that allows you to install the device in a visible place;
• low cost, making the boiler accessible to all segments of the population.

Right choice

Naturally, various models differ from each other technical parameters, which directly affect the advantages and disadvantages of the boiler.

Reliability

To judge the reliability of the device, it is necessary to find out how thick the steel of its body is. Unfortunately, some manufacturers neglect this rule and do not indicate this parameter on the heat exchanger packaging.

The optimal thickness of a steel wall is considered to be within three millimeters. If the thickness of the housing exceeds this value, heat exchange processes will be slowed down, which will certainly affect the comfortable heating of the room.

Along with the thickness of the metal, an indicator of its quality is very important, which can be determined by the level of permissible pressure specified by the manufacturer. Of course, the higher the indicator, the better and more durable the unit.

Economical

The efficiency of parapet boilers is evidenced by their design and operational efficiency. To find out how economical a heat exchanger will be, you need to find out its efficiency. It is this parameter that can best tell about the device’s ability to save energy resources.

Today, the vast majority of manufacturers strive to conquer the market, therefore they monitor the energy-saving qualities of their products. Thus, the optimal value of the efficiency factor can be considered 90 – 93%.

Remember, this is the only indicator that will most accurately tell you about the effectiveness of the device. However, it is also necessary to take into account the characteristics of the heated room, its size and degree of thermal insulation.

Technical specifications

When choosing a heating boiler, you need to pay attention to its dimensions, power and placement of connectors and fasteners. All these indicators affect the installation process and the location of the boiler.

Carefully monitor the connection to the water supply and gas mains (left, right). This does not apply to devices with a universal (two-way) connection method.

The power indicator is hardly inferior in importance to the efficiency of the equipment. The thermal balance in the room and fuel economy will depend on the optimally selected parameter. If the power is excessive, you will be faced with excessive consumption of gas and electricity.

The average calculation looks like 1 kW per 10 m² of room, however, thermal insulation, wall material and other features of the building are not taken into account, so it is advisable to double the kW figure. In this way, the negative effects of drafts, thin walls, and dilapidated window frames will be neutralized.

Installation

Parapet boilers are installed according to the same principle as convectors. First of all, a hole with a small diameter is created in the outer wall to remove exhaust gases and take in oxygen.

It is best to arrange the output point next to the window, which will provide access to monitor its operating condition and, if necessary, carry out maintenance. There are a number of rules according to which installation work. They are quite simple and can be done with your own hands using the following steps:

• a coaxial chimney cuts in;
• the first air pipe is installed;
• the water pipe is connected;
• the fastenings are tightened, the heating device is installed;
• a second pipe is installed;
• chimney sections are installed at an angle;
• sections are connected to the pipe;
• protection is installed, water supply pipes are installed, and an expansion tank is connected.

The requirements governing the connection of gas equipment are so high that in some cases, installation is impossible for a number of reasons. A parapet gas boiler has an operating principle that is different from its classic counterparts. Changes in the internal structure somewhat reduce the connection requirements, which makes installation possible even in apartments of multi-storey buildings.

Installation of a parapet gas heating boiler

The internal structure of the parapet gas equipment was designed in such a way as to prevent the combustion of oxygen from the room in which the boiler is installed. For this purpose, several design changes were implemented. As a result of the modifications, a gas-fired boiler was obtained, characterized by the following characteristics:

The internal structure and operation of a parapet boiler are in many ways similar to what is used in units of a classical design. But there are differences that make it possible to widely use the equipment.

How does a parapet boiler differ from a chimney boiler?

The non-volatile parapet gas boiler is a closed type unit. Gas combustion and all other processes occur in a completely sealed closed combustion chamber. The main difference from classic units is several characteristics:

• Lack of a classic chimney pipe. In classic boilers, air is taken directly from the room. After burning the gas, the combustion products go into the vertical chimney under the influence of natural draft. In parapet equipment, air intake and combustion products are removed using a chimney pipe.
• The special design of the combustion chamber - a steel heat exchanger, two burners, a DHW coil, are enclosed in a sealed chamber connected to a coaxial chimney. Air is taken in along the outer contour of the chimney pipe, after which it enters the burner from below. The heated air passes through a vertical heat exchanger and is discharged from the boiler body through the core of the coaxial pipe.

The normal volume of gas consumption for a 10 kW parapet boiler will be about 1 m³/hour. A double-circuit unit will consume approximately 15-20% more fuel required to heat the hot water supply.

Which parapet boiler is better to choose?

When choosing any heating boiler model, we focus on its thermal characteristics and additional functions. The performance of the unit, the possibility of heating water for domestic needs, as well as the plant that manufactures the heating equipment are taken into account:

• Productivity - average power indicators, calculated using the formula 1 kW = 10 m². This formula is suitable for well-insulated buildings in the middle regions of the Russian Federation with a ceiling height of no more than 2.7 m.
• Functionality - parapet single-circuit gas boiler, works only for heating. To connect DHW, you will need to install indirect heating, which will require additional financial costs. Double-circuit parapet gas boilers are convenient in this regard, as they have a built-in water heating function and a switch that allows you to switch the unit to summer or winter operating mode.
• Manufacturer - the ranking of the most reliable boilers is led by German manufacturers, Austrian and Czech models follow immediately behind them. Domestic parapet gas boilers, with a closed combustion chamber, have an attractive price and good thermal characteristics.

Judging by the reviews, the best manufacturers of gas parapet heating boilers are European and Russian companies. Although the products of the latter are somewhat inferior to their European counterparts in terms of efficiency and degree of automation, they are fully adapted to domestic operating conditions and are sold at an affordable price.

Models manufactured by factories located in neighboring countries are popular:

• Russian-made domestic gas parapet boilers:
  • Lemax;
  • Hephaestus;
  • Barsky Machine-Building Plant;
  • Helios;
  • Danko;
  • Conord;
  • HeatLine;
  • Taganrog Gas apparatus.
• Ukrainian gas heating boilers of the parapet type, for apartments and private houses:
  • Termomax;
  • ATON;
  • Atem;
  • Mimax;
  • Termotechnik;
  • Lighthouse;
  • Dani;
  • Proskurov;
  • ROSS;
  • Hearth.

The cost of parapet boilers from Ukrainian and Russian manufacturers is 2-3 times cheaper than their European counterparts.

How to install a parapet heating boiler

When installing a parapet boiler, the technical conditions and requirements that apply to the room where gas equipment, a connected chimney, etc. will be installed must be observed. The installation procedure and rules are specified in, and.

It is allowed to install parapet gas boilers in a private house or apartment in a multi-storey building. At the same time, the premises must meet the minimum requirements specified in the above regulatory documents. During installation, you must strictly follow the installation procedure and rules.

Requirements for placement under a parapet boiler

Installation restrictions stipulate the minimum dimensions and height of the room used for the needs of the boiler room. Additionally, requirements related to lighting, type of ventilation, etc. are described:

• Parapet boilers up to 30 kW can be installed indoors with a total area of ​​up to 7.5-8 m². It is allowed to use the kitchen and utility rooms for needs.
• The minimum ceiling height is at least 2.2 m.
• Ventilation of the room - the boiler room must have working supply and exhaust ventilation. Doors are installed without thresholds. Opening windows are required.
• Lighting - for every 1 m³ of the boiler room, there must be at least 0.03 m² of window opening.
• Features of operation - maintenance of gas equipment is carried out at least once a year. Along with the operability of the boiler, the operation of the supply and exhaust ventilation is checked. A report is drawn up on the inspection performed.
• Commissioning of the boiler is possible only after inspection by a representative of the supervisory authorities, compliance with all requirements regarding the correct connection of gas equipment.

Chimney for parapet boiler

It is impossible to connect a parapet boiler to a traditional vertical chimney. The internal design makes it possible to connect exclusively to a coaxial pipe. When simultaneously connecting several gas boilers at once, the use of a vertical coaxial chimney is allowed.

Correct connection to a horizontal chimney must meet several requirements:

1. The horizontal section should not exceed 3 m in total.
2. When passing floor slabs, a special block is used - cutting.
3. A condensate trap and wind protection are installed on the chimney head.
4. The chimney is installed at a slight slope from the boiler to prevent condensation from draining into the device.

The pipe for removing combustion products through the wall is made of plastic or stainless steel. The low temperature of the exhaust gases makes it possible to install any type of chimney you like. Real experience has shown that it is more practical to install a stainless steel coaxial pipe.

How to protect a parapet boiler from the wind

Parapet models, installed properly, work almost flawlessly. Blowing out of the boiler indicates the presence of violations when connecting the chimney, incorrect automation settings and other problems.

If the rate of interruption is greater than once every several heating seasons, the source of the interruption will need to be eliminated.

The reasons why a gas parapet boiler may go out are the following:

• There is no wind protection on the chimney head. The factory-made casing already has a special insert that protects from gusts of wind. The protection can be made from any galvanized steel, attaching it to the casing with press washers or rivets.
• The settings are set incorrectly - in order to prevent the parapet boiler from blowing out, you will need to lower the permissible gas pressure at which the module will remain operational.
• Insufficient draft intensity - the gas duct is designed in such a way that the slightest disturbance in the draft characteristics will lead to the boiler shutting down. To eliminate problems, check the correctness of the chimney connection and correct any mistakes.

To prevent possible boiler shutdowns as a result of gusts of wind, it is better to entrust the installation of the unit to a qualified specialist licensed to carry out this work.