Honeywell P658E1001 SPDT Pneumatic Electric Switch W/O Case 277V

The Honeywell P658E1001 Pneumatic Switch which is utilized in HVAC systems. It is a Single Pole Double Throw switch that works depending on the changes in air pressure. This is used to control a number of HVAC parts such as dampers, valves, and fans. All of the impellers and fans in the HVAC system share a common pressure set-point, when this amount of pressure is reached, the switch turns on and the signal is sent to whatever equipment is connected. This makes it possible to control the flow of fresh air, strength of the winds or the temperature of the building properly. Advantages associated with using this switch are; increased energy efficiency, comfort, and system reliability.