Manufacturer Name: Lennox Product Number: 15T78 OEM Part Number: 15T78 Product Description: Ecm Module Weight:2.79lbs/1265.52g The Lennox 15T78 ECM Module serves as an improvement and optimization device for Lennox HVAC systems, focusing mainly on the blower or fan motor. It also provides a longer motor life, higher reliability of the system, and less maintenance requirements. https://www.partshnc.com/15t78-lennox-ecm-module