HRV (Heat recovery ventilator) fresh air input, healthy,comfortable and energy-saving, Air Flow: 200-7000m3/h HRV (Heat recovery ventilator)Air conditioner Heat Recovery Fresh Air Unit (Ceiling Mounted ... the air conditioning system,. Applicable to hotels, villas, hospitals, cinemas, stadiums, recreations, office blocks, factories and so on. HRV (Heat recovery ventilator 200-7000m3 ...