Fantech SHR11004 SHR11004 HRV Heat Recovery Ventilator 120 V 873 CFM The Fantech SHR 11004 is engineered with 4 factory balanced, German manufactured Ebm-Pabst motors w/backward curved blades. The SHR 11004 Heat Recovery Ventilator is designed to carry a continuous stream of fresh air into a building while expelling equal amounts of contaminated air. The SHR 11004 HRV utilizes a "sensible" heat recovery core. The specially designed aluminum core transfers heat from the exhaust to the incoming air stream. This innovative process helps you save dramatically on energy costs. HRVs designed by Fantech are for cooler climates that have long heating seasons. Motors have permanently sealed and lubricated ball bearings that guarantee extra long life.