VENCO VHR ER energy recovery units, are designed to have high efficiency by using rotary type heat exchangers. The efficiency of VHR ER units is about 80% and this value is higher than the efficiency of VHR units (aluminum plate heat exchangers) at least 25%. By the way, the supply air temperature will be too close to the room temperature and it would not be necessary to use additional heater. Rotary type eat exchangers transfer the humidity as well as the heat. By the way, humidity will be transferred to the supply air from the fresh air in winter.And it is transferred to the exhaust air in the summer time. It helps to keep the humidity level close to the comfort conditions.