Master Flow® Automatic Shutter ‑ S24 & S30 Specs

      Master Flow® Automatic Shutter ‑ S24 & S30 Docs

      Master Flow® Automatic Shutter ‑ S24 & S30 Videos

      Quiet icon


      Less noise for more comfort
      Easy icon


      Automatic shutter
      Complemenary icon


      For Master Flow® Direct Drive 24" & Belt Drive 30" Whole House Fans

      FAQs for Master Flow® Whole House Fans


      Still have a question about this product?

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      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.

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