The GAF Master Flow Aluminum Square-Top Round Throat Roof Louver Vent is our most versatile utility vent. It is recommended for kitchen duct outlets and bathroom fan exhausts， as well as attic ventilation. It has a full 50 sq. in. of net free ventilating area (NFA) per vent.
Aluminum construction
Black finish
50 sq. in. net free ventilating area
Available in 4 colors to complement most roofs (mill， black， brown and weatherwood)
Long-lasting aluminum construction
Minimum roof pitch required is 3:12
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