This is the specific pressure at which the switch closes to allow the heater to fire

this switch ensures seamless integration into existing control circuits for consistent draft sensing and pressure monitoring

OEM Standards: Guaranteed fit for Rheem and Ruud units

Its 1/8 inch NPT brass construction ensures durability and leak-free performance in professional mechanical equipment rooms

and 75 BTU models

Lennox 54G44 Enthalpy Sensor Els PW 17895 This is the specific pressureThe Lennox 54G44 Enthalpy Sensor is a critical OEM component designed for high precision environmental monitoring in commercial HVAC systems. Also referenced under part numbers 54G4401 and C7400A1038, this analog enthalpy sensor integrates with economizer logic modules to evaluate both sensible and latent heat. By delivering a standard 4 to 20 mA output signal, it enables the controller to determine if outdoor air is suitable for free cooling,