About Master Flow™ Two‑Speed Control Switch

This 2 Speed Fan Control Switch allows fan control between Low Speed, High Speed and OFF for GAF Master Flow™ Whole House Fans (NOT WHFTAN1 Model). This accessory can also be added to replace the pull chain switch in the 24 in. Direct Drive Whole house Fan to allow use of the GAF Master Flow™ 12 Hour Timer (WHT36). Detailed installation instructions and diagram included.

Features & Benefits

Master Flow™ Two‑Speed Control Switch

Get automatic Lifetime Protection on your entire GAF roofing system

When you install any GAF Lifetime Shingle and at least 3 qualifying GAF accessories, you'll automatically get a Lifetime limited warranty on your shingles and all qualifying GAF accessories*.
*See GAF Shingle & Accessory Ltd. Warranty for complete coverage and restrictions. The word “Lifetime” refers to the length of coverage provided by the GAF Shingle & Accessory Ltd. Warranty, and means as long as the original individual owner(s) of a single-family detached residence [or the second owner(s) in certain circumstances] owns the property where the shingles and accessories are installed. For owners/structures not meeting the above criteria, Lifetime coverage is not applicable. Lifetime ltd. warranty on accessories requires the use of at least three qualifying GAF accessories and the use of Lifetime Shingles.

Product Documentation