Master Flow® Replacement Motors and Shutters are available through Home Depot.
Master Flow® Automatic Shutter ‑ S24 & S30 Specs
Master Flow® Automatic Shutter ‑ S24 & S30 Docs
Master Flow® Automatic Shutter ‑ S24 & S30 Videos
QUIET
Less noise for more comfort
EASY
Automatic shutter
Compatibility
For Master Flow® Direct Drive 24" & Belt Drive 30" Whole House Fans
FAQs for Master Flow® Whole House Fans
- The 30" Belt Drive (30BWHFS) - 3.7 amps (H1) 2.3 amps (Low)
- The 24" Direct Drive (WHFS24M) - 4.2 amps (H1) 3.2 amps (Low)
The motor would seem to be overheating, check the requirement for attic square footage and exhaust. Not having enough may cause the motor to run intermittently. Too little exhaust are can overwork the motor, causing it to overheat and shutdown.
- Belt Drive (30BWHFS) - 1152sq. inches NFA exhaust vents
- Direct Drive (WHFS24M) - 1108 sq. inches NFA exhaust vents
No, Master Flow® Whole House Fans are designed to be installed in a horizontal ceiling.
Please email warrantyllbp@gaf.com for more information and wiring diagrams.
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.
Related products for Master Flow® Whole Automatic Shutters‑ S24 & S30
Timberline HDZ®
Shingles
Premium Breathable Roof Deck Protection
Premium breathable synthetic underlayment for shingles/other roofing systems
Starter Strip Shingles
Eave/rake starter strip for standard-size asphalt shingles
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*.
Where to buy
Find a GAF distributor near you.