Lennox 26W76 SPST Pressure Switch 0.40" Water Column

The Lennox 26W76 is a Single Pole-Single Throw Normally Open pressure switch for Applications in HVAC systems to monitor air pressure. It completes an electrical circuit and sets off the heating and air conditioning system. Simply, the switch turns off and on according to air pressure levels. The pressure switch in this application is perfect for applications that require precise control of low air pressure in HVAC equipment. For instance, airflow to prove safety for diffusion combustion in gas furnaces. When the pressure is operating below the set point the switch will be deactivated, cut the gas flow, and keep out of hazardous operation.