Combi 302 Polar Top is a ventilation unit with heat recovery that is typically used in large single-family dwellings.
Most of the time, the heat recovery process occurs via a high-efficiency counterflow heat exchanger that achieves 85 - 95% heat recovery. The unit is also equipped with an air to air heat pump that can heat the supply air when the dwelling requires heating. Combi 302 Polar Top is used in low energy houses as primary heat source, but it can also control additional, supplementary heat sources such as electric radiators.
The heat pump has a reversible cooling circuit and it can therefore also cool the supply air with up to 14 ºC when necessary during the summer. It is not comparable with an air conditioner. The cooling effect of the unit is not as substantial, which is due to its low level of air exchange of approx. 0.5 times/hour. The outdoor air condenses, which results in a reduced air humidity level in the dwelling. The low level of air humidity makes it easier to cope with a high indoor temperature. That is why we call it “Comfort cooling”.