How to choose a double-circuit gas boiler
Everyone wants to live in a warm and comfortable home. It is not surprising that everyone wants to provide their homes with heating and hot water. Of course, without special devices it is impossible and better if one device performs two functions. Since natural gas is an affordable type of fuel, it is necessary to acquire knowledge of how to choose a double-circuit gas boiler. Why double circuit? Because the water "goes" in two circles - the circuits, one for heating, the other for hot water.
Principle of choice
There are many interesting proposals on the modern domestic gas equipment market. How to choose a gas boiler, so as not to freeze in winter, and there was hot water in the house all year round?
Decide what the heating area and how many places use hot water (kitchen, bathroom - one or more, bath or sauna). The exact calculation of the required amount of energy for space heating and water heating is performed by specialists.
There is a simplified and as close as possible to reality dependence: for heating 10 m2 the area will go 1 kW of energy, with the ceiling height should be 3 m, and the housing should be insulated.
If the parameters of your house differ from the specified standards, then using the proportion you can calculate the required power of a double-circuit gas boiler.
Consider that 40% of boiler power will be used for heating, the remaining power will be needed to heat the water. Mainly for a small house (up to 140 m2) or apartments in up to four rooms with one bathroom and a kitchen will fit a 24 kW boiler.
Types of boilers
Among the double-circuit gas-fired boilers, these types are distinguished: outdoor chimney and mounted turbocharged ones.
The first are mounted on the floor, they have an open combustion chamber (air enters the boiler from the room), automatic to regulate the temperature of heating water and a pipe for exhaust gas.
The pipe must be several meters higher than the ridge of the roof. For better traction, the boiler must be installed in a separate, fairly spacious room.
Depending on the type of heating system, and if it is not installed in the boiler, installation of a circulation pump is possible.
The second ones are hung on the wall, they include a pump, automatic control of heating the heat carrier, a turbine to ensure the efficiency of the boiler. Since the combustion chamber is closed, the air intake goes from the street, the exhaust gases go there too. For this function, two pipes, one inside the other, are led through the outer wall to the street. Turbocharged boilers are a little more economical than chimneys, but they are mainly suitable for an apartment or for a house the size of an apartment (no more than 60 m2).
How to navigate in a variety of sentences?
Earlier, the main criteria for selecting a double-circuit gas boiler were indicated. Of course, the choice of equipment affects:
- type of heat exchanger (monothermal or bithermic);
- efficiency value (boiler profitability depends on this indicator).
Manufacturers of modern boilers indicate a figure of efficiency above 90%, but this is not justified in all cases. This value of efficiency is achieved at maximum load. It is used extremely rarely, so the actual efficiency of the boiler is in the range of 80–90%, and every year it is reduced. In general, the efficiency of the boiler value is quite conditional, which depends on many factors:
- Calorie gas (its quality).
- Quantities of heat loss (wall, floor, ceiling insulation).
- Mode of operation of the equipment (heating temperature of the coolant).
- Its value.
- Equipment manufacturer, etc.
It is a lot of nuances, therefore it is better to consult the sellers of specialized stores, qualified installers of boilers. You can contact the local gorgaz for information. Talk to neighbors and friends who use such equipment, they will willingly give advice on which boiler to choose. Find an average of the opinions expressed. You can also write a comment on this article if you have any questions on the topic. The consultant of our site will readily provide you with additional information.
Video
If it is still difficult for you to determine which boiler to give preference to wall or floor, then you can watch the video, which tells about the advantages and disadvantages of each device: