Air earth heat exchanger 3-way air shutter

The 3-way air shutter controls the transport of outside air from outside via an earth-air heat exchanger or directly. The air shutter is opened or closed for this purpose.

During the transitional times in particular, instances may occur when the outside temperature is warmer than the temperature of air passing through the earth heat exchanger. If heating, this means that the outside air can be used more efficiently than the outside air passing through the earth heat exchanger.

Above and below the set temperature limits, the outside air is drawn in via an earth-air heat exchanger.