GF-12500 Air Pressure Proving Switch

Options: replacement Model: 12500


  • For installation on any forced air heating and cooling system
  • The Air Pressure Switch is designed to control Humidifier operation by sensing changes in air pressure within the furnace plenums when the furnace is in operation.
  • The Air Pressure Switch can be actuated by a positive pressure, negative pressure or a differential pressure of .05" W C or more.
  • The Air Pressure Switch contains normally open single throw contacts to supply 120V A C to the humidifier or humidifier transformer when the furnace blower runs.