Furnace controls

Our FAC controls are great for furncaes with or without an AC unit.
FAC 240 kit web
This Indoor fan control regulates the speed of the blower as heating and cooling supply temperatures change. Can be operated in the continuous mode or auto mode. Vastly improves comfort and balance of any HVAC system. It is a must for the maximum efficiency of all IAQ products and for humidity removal during A/C
  •  FAC control
  • 1 Blue Sensor
  • 1 Red Sensor
  • Instructions
  • FanHandler 5 Year Warranty and 90 day money back guarantee.

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Quick and Easy Wiring!


  • Hi Ryan,

    Controller arrived on Friday and was installed on Saturday. Works great. I actually have used it operating in a differential  pressure mode with a flow probe prior to the filter on the return and a flow probe about 2/3 of the way down the main duct (as I was taught for VAV systems).

    I’m very pleased with how this works and it has solved the control problem I was dealing with. The Bosch airhandler in the installation is capable of two speeds, but of course the ECM 4Z doesn’t care about those. One possible improvement for your controller is to allow for a different HI set point for Stage 1 and Stage 2 call. Stage 2 could be at a higher TESP, which would be a bit noisier, but generally wouldn’t be used. As is stands the ramping up of the fan is gentle and not very noticeable unless you listen for it. Much better than before.