Master Flow® Foundation Vent ‑ Automatic ‑ FVRABL Specs
Master Flow® Foundation Vent ‑ Automatic ‑ FVRABL Docs
Master Flow® Foundation Vent ‑ Automatic ‑ FVRABL Videos
Why Master Flow® Foundation Vent ‑ Automatic ‑ FVRABL?

AUTOMATIC
Automatically opens at 70°F (21°C) and closes at 40°F (4°C)

EASY INSTALLATION
Quick snap-in installation

BETTER PROTECTION
Helps prevent foundation decay and lowers risk of frozen pipes
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.