Master Flow® Foundation Vent ‑ Grill Style ‑ LW1 Specs
Master Flow® Foundation Vent ‑ Grill Style ‑ LW1 Docs
Master Flow® Foundation Vent ‑ Grill Style ‑ LW1 Videos
Why Master Flow® Foundation Vent ‑ Grill Style ‑ LW1?

STURDY
Die-cast aluminum vanes

CONVENIENT
Includes damper

VERSATILE
Designed for nailing to floor joists or as a foundation block replacement
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.