This SPST (Single Pole Single Throw) controller is specifically designed for unit heaters

When you're out in the field dealing with a snapped heating coil in a commercial strip heater

Durable Construction: Built to withstand the thermal cycling and humidity common in furnace burner compartments

This R22 thermal expansion valve utilizes an external equalizer to monitor pressure drops across the coil

Whether you are performing a mid-season repair or a routine furnace gas valve replacement

Lennox 29W64 Switch 321142-301 This SPST (Single Pole SingleThe Lennox 29W64 Pressure Switch is a critical safety component designed for two stage gas furnaces, engineered to monitor pressure differentials within the inducer system. This SPST (Single Pole Single Throw), normally open switch is calibrated to trip at 0. 90 1. 30" WC, ensuring precise venting and combustion safety protocols are met before the ignition sequence proceeds. Built to withstand high cycle operations in residential HVAC environments,