Lennox 80W51 Pressure Switch 320735-701 provided the tonnage requirements and

provided the tonnage requirements and pressure differentials are within the specified technical limits

ensuring electrical compatibility and preventing the nuisance faults often associated with generic alternatives

Direct OEM Integration: Designed specifically for Heil

and commercial heating systems requiring fast

The 1" outlet is larger than the 3/4" inlet to accommodate the volumetric expansion of water as it is discharged

Lennox 80W51 Pressure Switch 320735-701 provided the tonnage requirements andThe Lennox 80W51 Pressure Switch is an essential safety component designed for Lennox furnaces and higher efficiency HVAC systems. This differential pressure switch is factory calibrated to a 0. 55" w. c. set point, ensuring reliable monitoring of the combustion blower and venting pressure. As a genuine OEM Lennox replacement part, this switch precisely detects the negative pressure required to safely initiate the furnace ignition sequence, preventing