September222022

Gas wall-mounted double-circuit boiler with closed combustion chamber: model selection

In an effort to provide our house with heat during the cold period, we often find ourselves faced with the choice of a suitable unit for the heating system. Among the variety of gas heating equipment, I would like to choose an efficient, economical and affordable installation. A gas wall-mounted double-circuit boiler with a closed combustion chamber may well become a priority option in your case.

A wall-mounted gas double-circuit boiler is most often installed in the kitchen

Gas wall-mounted double-circuit boiler with a closed combustion chamber: advantages

Closed-type gas boilers are used for autonomous heating of small industrial premises, offices and private homes. Wall-mounted gas boilers for heating with a closed combustion chamber have a number of advantages relative to other similar equipment:

during operation, oxygen is not consumed from the room where the wall-mounted gas boiler is installed;
the supply of gorenje air is provided without the involvement of additional devices.;
for heating all rooms of the room, the boiler consumes the optimal volume of gas;
to use the boiler in private homes, there is no need to equip the chimney;

Location of a double-circuit gas boiler in the boiler room of a private house

individual selection of the appropriate operating mode;
compact dimensions;
available automatic control;
a wide range of models presented (user reviews of popular boilers can be found on manufacturers’ websites).

Gas boilers based on a closed combustion chamber are safe and can be installed directly in a heated room without the risk of oxygen shortage in it. This is provided by a special scheme of pipes (one inside the other). Air is supplied through one pipe, which ensures the combustion process, and carbon monoxide is discharged through the other.Gorenje Thus, the ingress of exhaust gas into the room is completely prevented.

Gas boilers with a closed combustion chamber are safe and can be installed directly in a heated room

Installation of wall-mounted gas appliances with a closed type of furnace

Wall–mounted gas heating boilers in modern design are quite compact equipment consisting of the following structural elements:

functional housing;
gas burner;
heat exchanger unit;
circulation pump;
temperature regulators and sensors;
expansion tank;
full security system;
removal of combustion products into the chimney (forced);
the control panel.

The device of a gas boiler with a closed combustion chamber

The model with which control (electronic or mechanical) you should choose – find out by reading the consumer reviews.

Taking into account the number of circuits and the connection scheme, the wall-mounted gas boiler can be equipped with an additional heat exchanger, fan, shut-off valves.

Closed-type boilers can be convection and condensation. In convection models, the released steam is removed outside, and in condensation models, this steam is used to heat an additional heat exchanger. The models have their pros and cons. Convection boilers are simple, cheap and easy to operate. Condensing systems are characterized by high performance, but at the same time they are much more expensive.

A wall mounted gas boiler is installed in the bathroom

Comparative analysis of devices with different types of combustion chambers

A boiler with an open-type combustion chamber uses indoor air for combustion, which can lead to a lack of oxygen. Gorenje Such a boiler can only be installed in a separate room (boiler room), its chimney must necessarily be vertical. From the reviews, you can find out that the price of such a boiler is relatively moderate.

Outdoor gas boilers for home heating. Choosing the optimal model. Advantages and types of gas equipment. Single-circuit and double-circuit devices. Boiler power selection. Schemes of heating systems.

Unlike heating devices with an open–type combustion chamber, a turbocharged wall-mounted boiler provides air supply and removal of combustion products through a coaxial chimney, the principle of operation of which is the simultaneous withdrawal of exhaust gas and intake of outside air. Important advantages of boilers with a closed combustion chamber are the safety of installation in a residential area, high productivity (heat exchange between the supply flow and the removed one) and the level of increased comfort in the house.

Useful advice! For efficient operation of a gas wall-mounted boiler, it is necessary to choose a place for installation next to the outer wall or ventilation shaft of the room.

The principle of operation of a single- and double-circuit gas boiler

A boiler with a closed chamber does not require a specially equipped separate room with the provision of all fire safety standards. The chimney can be horizontal and small in length. A device with such a combustion chamber has a high level of safety:

protection against gas leakage;
protection against claps during ignition;
protection against excessive water heating;
control of the fan operation.

This boiler is acceptable for installation both in a private house and in apartments (mainly in kitchens) of multi-storey buildings. Taking into account the probable absence of hot water supply in high-rise buildings, the use of gas wall-mounted double-circuit boilers with a closed combustion chamber in them will be quite justified. Reviews indicate the frequent use of such boilers in residential apartments.

The compact wall-mounted boiler is suitable for installation and use in an apartment

Types and features of models of boilers with a closed combustion chamber

Wall-mounted boilers with a closed combustion chamber are divided into single-circuit and double-circuit. Models of gas wall-mounted single-circuit boilers for home heating work only for heating radiators. If there is a need for hot water supply, then you should choose a single-circuit boiler with the possibility of connecting a secondary heating water heater (boiler) to it. Such a single-circuit boiler will be able to meet the needs for hot water for a large family living in one private house. Another variant of single-circuit design is a single-circuit boiler with a built-in boiler. It has large dimensions. The price of such boilers is noticeably higher, however, it pays off with an uninterrupted supply of hot water, even in flow mode. Which model of a single-circuit wall boiler is better to choose, find out from user reviews.

The principle of operation of a double-circuit boiler in the mode of heating and hot water preparation

The device of gas wall-mounted double-circuit boilers for heating the house allows you to function both for heating and for cooking hot water. Such boilers are equipped with two circuits. When using hot water, the supply of coolant to the heating system stops. The double-circuit boiler is equipped with a valve that automatically stops heating the heating circuit while using hot water. This gives many people reason to think that at this time the heating radiators are cooling down. As a rule, the percentage of temperature reduction in radiators is negligible (consumer reviews confirm this).

When using hot water in the consumer, the heating circuit is temporarily switched off

There are models of double-circuit wall-mounted boilers, in which heating of the heating circuit is provided due to an additional heat exchange unit. In such installations, hot water gives part of the heat to the heating circuit (the principle of heat recovery). Reviews of such equipment speak about the high performance of boilers.

Useful advice! A gas wall-mounted double-circuit boiler equipped with a boiler ensures independence from the water pressure supplied by the water supply.

Models of which wall-mounted gas boilers are better: what influences the choice

What criteria should be taken into account when choosing a gas wall-mounted double-circuit boiler? How to choose a model suitable for your room? First of all, you should pay attention to such indicators:

equipment capacity;
cost-effectiveness of installation;
conditions and complexity of installation;
the price of the heating device.

The internal structure of a condensing gas boiler on the example of a Vaillant device

How to choose the power. The power indicator is usually calculated by a specialist. If there was no such opportunity, you can resort to the generalized method of the so-called enlarged calculation. Its essence is that to heat one square of the room area, 0.1 kW of heat energy will be required. So, you can find out the required power (kW) by multiplying the entire area of the heated room by the number 0.1.

As for the efficiency indicator, a wall-mounted closed-type boiler due to efficient gas combustion is a device with high efficiency (up to 98%) at rated power.

The efficiency of a wall-mounted gas boiler of a closed type can reach 98%

Useful advice! A wall-mounted gas boiler of a closed type is an energy-dependent device. If electricity is often cut off in your region, this should be taken into account when choosing a boiler.

The complexity and cost of installation depends on where it is planned to place the installation of a gas double-circuit wall boiler. How to choose a place in the kitchen or combined bathroom? Gas equipment installers will help with this. If precise placement in cramped conditions is required, installation will cost a little more.

The device and the principle of operation of a double-circuit boiler from the manufacturer Viessmann

Every potential buyer wants to choose a model of a gas appliance with an acceptable price. It depends on what power unit you prefer and with what functions. The more technical elements made of high-quality materials in the design, the better the boiler and the higher its cost. Positive reviews were received by double-circuit wall-mounted boilers with a heat exchanger made of steel. Such a boiler is able to heat water quickly, weighs little and is easy to install.

Which models of gas wall-mounted double-circuit boilers are better to buy? Reviews of people using such equipment indicate the ease of operation and the ability to adjust the temperature regime with an accuracy of 1 ° C. In case of a malfunction of the equipment, an error code is displayed on the display.

Gas boiler control panel with mechanical controls and electronic scoreboard

Features of installation of gas wall-mounted boilers of closed type

Before purchasing a gas wall-mounted double-circuit heating boiler, prices and reviews can be clarified with the consultant of the trading organization.

When buying a boiler, it is necessary to make sure of the appropriate equipment of the device. After removing the packaging, the housing of the unit should not be damaged and an operating manual should be attached to it. It is also worth checking the availability of all components so that, in case of their absence, you can immediately contact the seller.

In addition, it is necessary to compare all the characteristics of the device on the body and packaging of the boiler. They, in turn, must comply with these indicators from the instructions.

Connection diagram of a double-circuit gas boiler to water supply and heating systems

Before installing a wall-mounted gas boiler, it is necessary to contact the local gas service to coordinate the installation scheme.

To ensure gorenje process, the air enters the boiler of the closed type from the street. There is no need for an individual chimney, the exhaust gas outlet is provided by connecting to a common chimney. Special attention should be paid to ensure that the installation place of the fan is not clogged during installation. Before starting the system, it is advisable to check this place for debris and dirt.

The electronics of the double-circuit boiler must be configured by a qualified specialist

The external air supply pipe must be located at a height of 2.2 m from the floor and at least 18 mm protrude from the wall. To remove the resulting condensate from the chimney, the flue pipes must have a certain slope. The gaps between the pipe and the wall are subject to mandatory sealing.

The wall-mounted boiler is mounted on well-fixed hooks (fasteners in the upper part of the device). The unit is installed so that in the event of a malfunction, service and repair can be performed without disconnecting it from the gas and water pipeline system. It is necessary to provide shut-off valves on the water supply pipes to ensure the repair work.