Y4152 | White-Rodgers 21V51U-843, Universal Two-Stage Integrated Furnace Control for 3-Speed (ECM) Motors, Includes Universal 120V Nitride Ignitor | Lennox

Lennox Y4152: The 2-Stage Heating System with Variable Speed ECM Kit. The Lennox Y4152 is a highly efficient and innovative 2-stage heating system that delivers exceptional comfort and energy savings. It comes with a variable-speed ECM (electronically commutated motor) kit, providing precise airflow control and maximizing efficiency. This system features a compact design and quiet operation, making it ideal for residential and commercial applications. Its advanced technology and reliable performance make it an excellent choice for maintaining a comfortable indoor environment while reducing energy consumption.