• The plate recuperator consists of cross-shaped plates, between which isolated supply and exhaust air flows are flowing across and in parallel and their temperature equalises.
• The advantage of the plate heat exchanger recuperator is very high efficiency of separation of exhaust and supply air – up to 99.9%.
• Thus, it can be used to recover heat even from the warm air flowing out of the kitchen exhaust channel without worrying that unwanted smells will spread in other areas of housing.
• This type of recuperator does not recover the humidity in the room.
• In cases where the outdoor air is very dry, humidity levels in the room will also decrease.
• The disadvantage of a plate recuperator is the possible formation of condensate in the heat exchanger itself.
• This may occur during the winter period, when the outdoor air temperature drops below -2°C.

There are two solutions that are used to prevent condensate formation:

1. to reduce the air supply intensity and to increase the air exhaust intensity, thereby reducing the efficiency of the recuperator and reducing the supply air temperature.
2. to install an electric heater in the outdoor air supply channel and to heat outdoor air above -2°C, but this will result in additional electricity consumption.