Radiators are one of the most important components of the central heating installation and a properly selected radiator is necessary to ensure that we are not wasting money or energy to overheat the house.

Purmo offers many radiators that meet all preferences and requirements. With its many choices, you can find exactly what you need to give your space not only thermal efficiency and heat control - but also shapes, styles and colors that you probably never imagined to exist.

Heat loss calculations are necessary to determine thermal performance along with the size and dimensions of the radiator needed in a room. The final number of heat loss can be combined with a similar or higher performance radiator. If this study is underestimated, the room will not reach the required temperature during the cold winter days and the house will be poor. In case of overestimation, the room will overheat and will not be cost effective. Approaches to the size of the radiator in a room can be estimated using a standardized calculation but, for better accuracy, you should consult a qualified technician or engineer.

When calculating a room heating requirement, it is important to take into account other factors that can affect heat loss, for example:

External temperature. The loss of heat lost from a building may depend on its location. During a typical winter, temperatures vary between seaside and mountainous areas. The lower the outside air temperature, the greater the heat loss.
Building installation and wind conditions. Buildings in open air and in windy areas lose heat at a faster rate than identical buildings located in a settlement protected from extreme weather conditions.
Age of the building. Modern buildings are usually better insulated than old, detached buildings. They have a low heat transfer rate and therefore need less heating to maintain a comfortable temperature.
Windows and doors. High quality windows reduce the heat transfer rate and reduce the heating costs for the homeowner.
Position of external walls. Rooms without external walls will have a lower heat transfer rate.
Internal temperature. Consideration must be given to the purposes for which the space is used - the higher the required temperature, the greater the heater radiator.
Heating parameters. The thermal yields of the bodies are listed according to EN442 (90 ° C / 70 ° C / 20 ° C). If the installation operates on different parameters than these, correction factors should be used.
Whenever possible, radiators should be placed on the outer wall under the window. In this way, the cool air flowing through the window is heated by the radiator and distributed equally around the room. Also, the use of many small radiators in a large room instead of a bulky, will ensure a better distribution of heat. The dimensions of a radiator are also important so that the room looks well balanced. There is nothing worse than having a small, but high-thermal heater, placed in a large empty wall. Regarding the aesthetics of the room, it is preferable to choose a larger-sized radiator with lower performance per square meter. If a radiator is to be covered, for example with curtains, the radiator should be significantly larger to take account of reduced heat transfer.

In areas with high air humidity, such as bathrooms and saunas, panels and decorative radiators should not be used unless there is adequate ventilation. PURMO radiators have many different connections to suit any installation and can be connected from the sides or below. If a radiator is to be installed under a window, its height depends on the distance between the window and the floor. The lower end of the radiator must be placed at least 10 cm above the floor and at least 10 cm below the ledge.