How much cross leakage is expected through the energy recovery wheel?
Cross leakage through the energy recovery wheels ranges from 2% to 5% between the supply and exhaust air streams. This amount of cross leakage is minimal and in comfort ventilation applications is perfectly acceptable. These leakage rates are also acceptable for Class 3 Air (toilet room exhaust). According to ASHRAE Standard 62-89R committee, up to 10% cross leakage of Class 3 Air is acceptable for the purposes of energy recovery.
