Manufacturers of central heating boilers offer a wide range of boilers, which makes us often feel lost. Therefore, in order to make it easier for us to make a decision with which we will be satisfied, it is good to determine what we should pay attention to before purchasing.
Before choosing a central heating boiler, we should get to know the design heat demand of our building. If we do not have this parameter specified in the design, we can determine it approximately. It is assumed that approximately for non-insulated buildings, which were built in the 1980s and earlier, the building’s heat demand is 100 W/m2 of the building’s usable area. If the building is insulated, the value is 70 – 80 W/m2. For recently built houses it is assumed that it is 60 W/m2. We should also remember that we will rarely use the full power of the boiler. That is why you can choose boilers with slightly lower output. The smallest problems with operation at low revolutions have boilers with a feeder, in which the output can be regulated to a much greater extent than in other types of boilers.
The boiler should meet our needs. In order for this to happen, we must pay attention to it: