The Lennox 12W78 Drain Pan is a durable HVAC component designed to collect and direct condensate produced during the cooling process. It works by capturing moisture from the evaporator coil and channeling the collected water toward the designated drain outlet. This drain pan is used in compatible Lennox air handlers and other specified HVAC equipment. It helps prevent water leaks, pro... https://www.partshnc.com/lennox-12w78-drain-pan