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Variable Fan Control – FC-1T-1VAC


Please note that the MTC-4C model has been discontinued and replaced with the FC-1T-1VAC

Simple and effective temperature controller

The FC-1T-1VAC allows you to automatically control ventilation fans according to the ambient temperature.

How it works

  • When the temperature is at the temperature set point, the FC-1T-1VAC operates the fans at the idle speed setting.
  • When the temperature exceeds the set point, the FC-1T-1VAC increases the speed.
  • When the temperature increases 6°F above the set point, the FC-1T-1VAC increases the speed to maximum.
  • When the temperature drops below the set point, the FC-1T-1VAC shuts off the fans (in shut-off mode), or operates the fans at the idle speed (idle mode).

The FC-1T-1VAC is ideal for poultry, livestock, greenhouse, or light industrial buildings.


  • One variable speed output
  • Adjustable temperature set point, range: 40 to 90°F (4 to 32°C)
  • Fixed 6°F temperature differential
  • Automatic shut-off and idle modes
  • Off set-back of 2°F for shut-off mode
  • Adjustable idle speed for automatic mode
  • One-foot temperature sensor, extendable to 500 feet
  • Overload protection fuse
  • NEMA 4X enclosure (corrosion-resistant, water-resistant, and fire-retardant)
  • CSA approval
  • 2 year warranty