The cast iron construction ensures optimal heat dissipation and structural integrity under significant torque loads

making them essential for high-load safety systems

the 7" RC control slows the velocity of combustion gases through the heat exchanger

making it a staple for technicians managing multi-zone temperature regulation

ensuring the boiler modulates correctly based on the return water temperature

Lennox 22K51 Control Board 321894-709 The cast iron construction ensuresThe Lennox 22K51 Ignition Control Board (OEM 607308 22) is a critical integrated furnace control designed for high performance service in select Lennox communicating enabled gas units. Engineered to interface with SL280UHV, SL280DFV, EL296UHV, and EL296DFV heating systems, this 120V furnace ignition module ensures precise hot surface ignitor timing and reliable flame sensing. This board replaces legacy 107045 XX series controls, providing a stable