Master Flow® Replacement Humidistat / Thermostat ‑ HT1 Specs

      Master Flow® Replacement Humidistat / Thermostat ‑ HT1 Docs

      Master Flow® Replacement Humidistat / Thermostat ‑ HT1 Videos

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      For all climate conditions
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      For all Master Flow®  single-speed roof/gable power attic vents.  Optional replacement on existing thermostatically-controlled Master Flow® vents and replaces the PT6 Thermostat and H1 Humidistat.
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      Helps power ventilators reduce damaging attic heat and moisture in the attic

      FAQs for Master Flow® Power Vents


      Still have a question about this product?

      Fill out a warranty or technical question form below and a member from our team will be in touch.

      Warranty QuestionsTechnical Questions


      See Master Flow® Powered Ventilation Products Limited Warranty for complete coverage and restrictions.
      Visit the Attic Ventilation Calculator for details.

      Note: Always have a balanced ventilation system. In no case should the amount of exhaust ventilation exceed the amount of intake ventilation.

      Where to buy

      Find a GAF distributor near you.

      Find a contractor

      Find a GAF certified contractor near you.