Lennox 51W91 SPST Pressure Switch 0.95" WC

Lennox 51W91 Pressure Switch is an essential part of the HVAC system, it is used to measure and regulate the pressure of the air With an operating pressure of 0.95 inches water column, this SPST switch helps to open or close an electrical circuit depending on the pressure values. This functionality is essential in achieving the safety and reliability of HVAC systems like gas furnaces/air conditioner systems. In the case of pressure being lower than the set point, it stops the flow of gas to avoid dangerous conditions and increase the stability of the system.