THE TECHNOLOGY
Heating is not necessary due to the high efficiency of the ESAS Airdoor, although it is possible to provide the Airdoor with a heater.
If the ESAS Airdoor is switched off, the cold outside air will flow in at the upper side, while the warm inside air flows out on the upper side. Big differences in temperatures will increase this phenomenon.
With ESAS Airdoors, you can save up to 60+% energy consumption.