The Trion 24-102 UMT Series Air Cleaner unit was made in the 1960s and 1970s. It was a whole house ducted electronic air cleaner available in both horizontal and vertical models. There was a single large collector cell in it and an after filter. It had a built in water wash system with a single water line and multiple spray nozzles. Some models had the optional M control to automate the wash cycle. There are NO available parts for this unit due to its age.