this specific part is calibrated for Natural Gas (NAT)

4 to 5 inches water column (WC) and utilizes a 1/2 inch NPT connection for seamless integration into commercial burner manifolds and HVAC air handling units

The HD44AR270 is typically configured for CCW (Counter-Clockwise) rotation from the lead end

Angle body design allows for compact piping and simplified installation in tight mechanical headers

Lennox 80W53 Pressure Switch 322056-301 this specific part is calibratedThe Lennox 80W53 Pressure Switch is a critical OEM replacement part engineered for high efficiency furnace applications. This single pole single throw (SPST) switch is factory calibrated to a 0. 68" WC (water column) set point, ensuring precise monitoring of the inducer motor's draft. A failure in this component often results in a sequence of operation lockout, as the control board must verify proper venting before allowing gas valve ignition.