Trane Cnt3666 SPST Pressure Switch 0.15" WC

The Trane CNT3666 single-pole, double-throw pressure switch is perfect for controlling the specific air pressures inside HVAC systems. It uses snap action meaning it is used to abruptly change electrical contacts upon arrival at a pressure level (set point) of this instance, 0.15” Water Column When the pressure approaches the set point the switch moves and either joins or breaks the circuit. This can control things such as the fan turning on or off the system depending on the connection setup. These are used in furnaces and air handlers; ensuring that fire risks are kept at arm’s length and efficiency is served aplenty.