3fantechWhat are HRVs?to understand these products and their functions, here are a fewthings to remember.Heat Recovery Ventilators (HRVs)are recommended for colder areas of the country that have longerheating seasons as well as drier desert areas of the South.Heat Recovery Ventilators are complete whole house ventilationsystems that incorporate a supply fan and an exhaust fan in oneunit. the supply fan draws fresh air in from the outside and theexhaust fan pushes stale contaminated air out. the two air streamsare separated by a heat recovery core which tempers the air,making it the most comfortable solution for a healthy indoorenvironment.For information on how these units can help you save energy andlower heating or cooling costs, read “How Do they Work?”.Port ConfigurationFive Port Models feature motorized damper for recirculation mode and defrost. Positive shut off of supply port when unit is in standby.Four Port Models provide constant ventilation even in defrost mode without the need for additional parts. An exhaust only (fan shut down) defroststrategy is an effective method at an affordable price.note Warning/ImportantnoteInformation technicalinformation Practical tipHow do They WorkHeat Recovery Ventilators (HRVs)An HRV is designed to be a cost-effective and reliable way to bring acontinuous supply of fresh air into a home while exhausting an equalamount of contaminated air. If it is properly maintained, an HVR canmeet a home’s total ventilation requirements by itself. HRVs usewhat is called a “sensible” heat recovery core. this special aluminumcore transfers heat from the exhaust air stream to the incoming airstream. Fresh incoming air is tempered by the heat that istransferred from the outgoing air so you save on energy costs.Fantech HRVs are equipped with automatic defrost mechanisms soeven if you live in the coldest climates, you can use your HRV allyear long.Fresh Airfrom OutsideFresh Air toInsideExhaust Air toOutsideExhaust Airfrom Inside