An aluminium plate rotor containing air flow channels is installed on bearings in the ventilation unit with a rotary heat exchanger. The exhaust air heats up the rotor and this heat is used to heat the supply air.
In this type of equipment, supply and exhaust air are slightly mixed – 2% to 5%.
Thus, there is a minimal possibility of transmitting odours from exhaust air to supply air.
The rotary heat exchanger partially recovers humidity from exhaust air, which is important during the winter period when the relative humidity of the outdoor air is low.
There is no possibility of condensate formation in the rotary heat exchanger, which eliminates the risk that the equipment may freeze.
It should be noted that at very low outdoor temperatures the effectiveness of this type of recuperator will reduce.
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