Common Questions & Technical Support Is the S1-331-03012-000 compatible with single-stage furnaces

Optimized Airflow: Engineered to minimize turbulence within the blower deck

Efficient Integration: Direct-fit 7-pin harness eliminates the need for field splicing

ensuring proper balance and reducing mechanical vibration that leads to premature motor bearing failure

It serves as the direct 1171981 replacement for 1012351

Lennox 19F20 Heater Kit 320819-301 Common Questions & Technical SupportThe Lennox 19F20 (Model ECB29 15CB P) is a heavy duty 15KW heater kit engineered for seamless field installation within compatible air handler unit cabinets. As a veteran grade electric heat kit, it features high efficiency helix wound nichrome heating elements positioned directly in the air stream to ensure instant heat transfer and lower element operating temperatures. This Lennox 15kW electric heater comes factory equipped with integrated 35 Amp