Master Flow® Automatic Shutter ‑ SGM20 Specs
Master Flow® Automatic Shutter ‑ SGM20 Docs
Master Flow® Automatic Shutter ‑ SGM20 Videos

Compatibility
For Master Flow® and most popular brand gable mount power attic vents

AUTOMATIC
Moving air opens the louvers only when the power vent is operating

PROTECTION
When vent is off, shutter helps prevent infiltration of rain, snow, insects, etc
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.