Heat recovery air handling units are mainly used in the places where fresh air is needed. Heat or enthalpy wheels are rotary air-to-air heat exchangers. Adjacent supply and exhaust air counter flow streams each flow through half of the wheel and transfer sensible and latent energy. CAPACITY RANGE: 1000 cfm to 40000 cfm APPLICATIONS: Clean Room, IAQ, and Energy Recovery. For Operation Theatre ICU ICCU, Pharma, Laboratories, Petrochemical, Aerospace, R&D Facilities and Food Processing