Whole house electronic air cleaner. Easy installation on any forced air heating or cooling system. Just mount between the air handler or furnace and the return air duct system. May require ductwork modification. This unit is roughly 16 tall x 25 deep x 6.4 wide. Built in automatic air flow sensor Aluminum mesh prefilter Pre wired cord with plug Runs on 120 volts Compatible AirWatch indicator system (optional extra).