483760 Edition II II | Page 214

215 | Work SHR 8004 Commercial Heat Recovery Ventilators The SHR 8004 Commercial Heat Recovery Ventilation system (HRV) is perfect complement to today's tight buildings. Fantech Heat Recovery Ventilators (HRV) are designed to supply air into a building while exhausting an equal amount of contaminated air to the outside. The aluminum heat exchange core transfers sensible energy between air steams resulting in tempering of the supply air and reduced loads on the HVAC system. A preset defrost sequence is activated at an outdoor air temperature of 23ºF and lower. During the defrost sequence, the supply blower shuts down & the exhaust blower continues to ventilate for a few minutes. The