Combi 302 Polar is a ventilation unit with heat recovery that is typically used in 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. In some low energy houses Combi 302 Polar is the primary heat source, but it can also control external, 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. Combi 302 Polar 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. But when the outdoor air is cooled down, it will condense, and the cooler air that is led into the dwelling is therefore less humid. Low air humidity makes it easier to cope with a high indoor temperature. We therefore call it “Comfort cooling”.
Combi 302 Polar is often installed in an unused loft so it does not take up space in the utility room. Placing it in the loft also means that it is easy to block potential noise from the unit and prevent it from entering the dwelling.