Fireplace with heating circuit
A fireplace with a heating circuit not only provides heat in the room where it is located, but also allows you to heat other rooms in the building. Installation of such a system in a country house solves 2 problems at once: first, it creates a cozy corner in the living room with a view of the living flame, secondly, it solves the problem of heating the dwelling as a whole. The work is based on a heat exchanger in the fireplace portal, from which pipes for the batteries in other rooms are diverted. Models with long-term heating can provide heat on large areas with a minimum amount of fuel.
There are a large number of ready-made factory models with a body made of cast iron or steel and transparent doors made of refractory glass. They are compact and mobile, they can be installed anywhere. There are also stoves that are installed permanently and cannot be moved.
Heating circuits can run on water or hot air. Air systems have less working pressure, therefore less prone to breakage.But heating with hot water can be carried out in any room, including with ventilation: kitchens, bathrooms, dressing rooms.
Advantages and disadvantages
Fireplaces with a heating circuit have the following advantages:
- with an existing heating system, they are easily connected to it;
- may have the function of hot water;
- use environmentally friendly and safe fuel;
- because of the heat does not allow the furnace to overheat;
- allow to heat large rooms with a second floor;
- Some models of long-term heating furnaces have additional functions, such as cooking hobs.
From customer reviews, you can learn and common disadvantages:
- adjustment of the heat supply is possible only in the manual mode, in contrast to the multitude of mathematical systems on gas, electricity and solid fuel;
- compared to other systems, this is not the most efficient way of heating with radiators, especially in harsh winters.
Principle of operation
Factory-made models of heating boilers for such fireplaces have a heat exchanger in the form of a spiral or a radiator of thin pipes through which water or air circulates around the body.When heated, they flow through heating pipes to batteries in other rooms.
Fireplace with a water circuit on wood fuel has a low efficiency, not exceeding 60%. In addition, simple models for the effective supply of heat to the house need a constant laying of firewood. Pellet fireplaces are spared from these problems. They use pellets as fuel, which have a higher specific heat of combustion than firewood. Pellet is automatically loaded from the back of the furnace. Adjust the intensity of supply and, consequently, the power of the fireplace by using an electric control panel.
Fireplaces with air duct can have an efficiency of up to 80%. Sophisticated models can be designed with heating in the furnace and wall. This achieves maximum heating of the circulating air. Unlike water circuits, air systems need fans, and this requires additional wiring and greater power consumption. But pipes for them are less demanding of strength, most often they are made of thin and cheap aluminum.
For safety, most fireplaces with air and water circuits are equipped with a security door fromfireproof glass. Heat enters the room through this glass due to infrared radiation. This eliminates the possibility of sparks in the room, and the owners can enjoy the view of the bright flame. Soot protection is provided for the cleanliness of the glass flap.
How to connect
Connecting the fireplace with a water or air circuit can be made in the selected place, as long as it provides for the output of the chimney through the roof to the street. For effective operation of the pipe that displays smoke, it must have a distance from the heating tank to its upper end of 3 to 5 m.
Purchased fireplace has a maximum working capacity specified in its data sheet. The model should be chosen depending on the total area of the building:
- 60-200 sq. M. m. - up to 25 kW;
- 200-300 square meters. m. - 25-35 kW;
- 300-600 square meters. m. - 35-60 kW;
- 600-1200 square meters. m. - 60-100 kW.
The connection diagram of the fireplace with a water circuit contains the distribution of heating pipes in rooms indicating the location of thermometers, pressure gauges, radiators, circulation pump, safety, air and drain valves.
The system connection procedure consists of the following steps:
- Leveling the floor at the location of the fireplace and cover it with a protective layer that protects against high temperatures.
- Installation of the furnace, its regulation level.
- Installation of heating pipes with a circulating pump.
- Connection to the heat exchanger circuit.
- Injecting water into the circuit, checking the operation of the circulation pump and the tightness of all components.
- Installation and connection to the flue channel of the chimney's furnace and its sealing.
- Trial kindling fireplace.
After checking the operation of the system, the readings of the measuring instruments, the circulation rate and the flue when the first firebox, you can begin regular operation of the stove.
When connecting a fireplace with an air duct for heating the whole house, the first stages are identical: leveling and protecting the floor, setting the device to a level. Air heating systems do not need a pump; hot air is circulated through pipes by gravity. For effective current of heated air, it is necessary that the air ducts are no more than 3 m in length, and the entire system has a minimum number of corner turns.
As air ducts in the rooms, pipes made of refractory aluminum are taken. This material is able to withstand temperatures up to 250 ° C. The air ducts themselves have thin walls, light weight and are easy to install anywhere.It is best to attach them to the ceiling with metal hooks or metal profile frame. For a more aesthetic appearance, the heating system is often hidden under decorative boxes. After installation of aluminum pipes, it is necessary to seal them and connect ventilation.