On the market there are air conditioners of different power able to satisfy every kind of need. Generally those of small power, that is up to 5 kW, are installed in single rooms. Power is the fundamental datum to be evaluated at the time of purchase: but how is it established if one size is more performing than the other? To define the most suitable size for specific needs, it is necessary to know the size of the premises, the windowed area and their exposure.

An undersized machine could prove impractical because, to reach the desired temperature, it will be continuously in operation causing high electrical consumption and a quicker deterioration. On the contrary, an oversized machine would be incapable of dehumidifying the environment because it would reach the set temperature in a short time, without eliminating all humidity, with the result of perceiving that unpleasant sensation of wet cold on the skin.

But how is the required power calculated?

The calculation described here is only a generic example but indicative of the "cold" and "hot" needs of the environment you want to air-condition (alternatively there is our thermal dimensioner). The equation for calculating the thermal or cooling power (expressed in kW) required to condition a room is as follows: K x l1 x l2 xh = W. In detail l1 and l2 represent the sides of the room, h represents the height while k is a constant, which can oscillate by one, two or three units depending on the thermal dispersion of the room. This coefficient should generally be considered equal to 25 for cold and equal to 35 for heat. The result obtained, although very likely, should be considered indicative: it is only an expert installer who, after having carried out a technical inspection, can determine the real cooling or thermal needs of an environment.

Heat Requirement

What is the difference between a well-insulated and a non-isolated building? Here are 4 construction classifications:

Well-insulated construction (double walls, ceiling, wall and floor insulation, double-glazed windows, insulated doors);
Discreetly isolated construction (double walls, ceiling insulating material, a few single-glazed windows);
Not very isolated construction (simple walls with glass parts and insulated roof);
Uninsulated construction (covering in wood, sheet metal or plastic material).