How does ceiling heating work?
Ceiling heating radiates the room and heats it to a comfortable temperature. It is laid over a large area, which means that it can work with low flow temperatures. This saves energy costs. And leaves plenty of space for the interior design.
Hot air rises. Doesn’t that mean that ceiling heating heats up the wrong parts of the room? No. Unlike convection heating systems, they heat the room with cosy, radiant heat.
Here, physics can provide an explanation. Radiation transmits the heat via infrared waves. The most important source of radiant heat is the sun. The radiation is emitted at right-angles to the surface. With ceiling heating, therefore, it is emitted from above to below. When the waves impact a solid object - such as furniture, the floor or a human body - they are converted into heat. The solid objects emit the energy absorbed into the room as heat.
Why ceiling heating is cosy
Don't you have a warm head and cold feet with ceiling heating? No. Ceiling heating is surface heating. It uses the entire surface as a heat source. This heats the room evenly. As a heat transfer medium, water is pumped through the pipes. Thanks to the large area over which the heating is laid, it is sufficient for the water to be heated to a maximum of 40°C (depending on the outside temperature). In comparison, conventional radiators require a flow temperature of up to 60°C. Due to their smaller surface area, they only emit heat in a localised way.
At the surface, the ceiling heating temperature is between 23°C and a maximum of 35°C. These temperatures feel very comfortable. After all, this is precisely the temperature we know from the most comfortable situations: When you are lying next to your partner in bed, they emit a surface temperature of 35°C.
Low temperature ceiling heating can be used in rooms with a height of between 2.5 and 3.5 meters. Here, the radiant heat can unfold in the best possible way - with flow temperatures of between 26 and 40°C. For rooms with a height of over 3.5 meters, a higher flow temperature is required.