About Master Flow™ Replacement Humidistat

The GAF Master Flow™ Adjustable Humidistat is used with all GAF Master Flow™ power vents. The humidistat helps reduce damaging moisture and heat in the attic. Manually adjustable humidistat control for varying climate conditions.

How to wire the thermostat (PT6), Humidistat (H1), and the humidstat/thermostat (HT1)?
From power source:

  1. White Connects to the white wire from the motor
  2. Black connects to the black lead on the T-Stat.
  3. Green connects to the green ground screw on the PT6 casing.
From Fan Motor:
  1. Black (w/White Stripe) goes to the remaining black lead on the T-Stat.
Please email warrantyllbp@gaf.com for more information and wiring diagrams.

How to wire the PT6 to the (H1)?
From power source:
  1. White Connects to the white wire from the motor.
  2. Black connects to one of the black leads on the T-Stat and one of the black leads of the H-Stat.
  3. Green connects to the green ground screw on the PT6 and H1 casings.
From fan motor:
  1. Black (w/White Stripe) goes to the remaining black leads on the T-Stat and H-Stat.
Please email warrantyllbp@gaf.com for more information and wiring diagrams.

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