The Trion UMT Air Cleaner was a whole house electronic electrostatic air cleaner designed to be attached to your duct system. It uses electricity to attract and hold dust, dirt and allergens. Maintenance consists of washing out the collector cells and prefilters on a monthly basis. All the parts for the Trion UMT are obsolete and no longer available. This unit was produced in the 60s. The modern day version of it is the HE2000 available below.