The HVI-certified VHR 1404 heat-recovery ventilator is rated to recover and exchange 62% of exhaust air heat. The unit is equipped with two factory-balanced EBM motors with permanently lubricated sealed bearings for durability and low maintenance. An aluminum heat-recovery core is configured for efficient cross-flow ventilation; washable electrostatic panel-type air filters enable easy care. A preset defrost sequence automatically activates to protect the unit in extreme cold temperatures while maintaining fresh air intake and heat exchange. 800.747.1762. www.fantech.net.