About Master Flow™ High‑Capacity Dome Vent

Extra-large Vent Moves Large Quantities of Exhaust. A great solution for attics requiring large quantities of exhaust ventilation, especially those with limited ridge area, it’s made from galvanized steel and includes a durable insect screen.  This high-capacity static dome vent delivers an extra-large 144 sq. in. (92,903 mm2) of Net Free Area to help exhaust heat and moisture from the attic.  Available in popular colors to complement your roof.

This product can be used to comply with certain FORTIFIED Roof™ requirements. Visit gaf.com/fortified and current FORTIFIED Home™ Standard available at fortifiedhome.org for details. Applicable in the U.S. only.



Features & Benefits

¹Testing performed under controlled laboratory conditions. Hail damage is not covered under GAF limited warranties

Earn GAF Rewards when you buy GAF Master Flow® ventilation products

Master Flow™ ventilation products are eligible for GAF Rewards points. Visit GAF Rewards for a complete list of qualifying products.
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Eligible accessory product in the Attic Ventilation Category of GAF Residential Enhanced and WindProven™ Limited Warranties*

*15-year WindProven™ Limited Wind Warranty covers GAF Shingles with LayerLock® Technology only and requires the use of GAF Starter Strips, Roof Deck Protection, Ridge Cap Shingles, and Leak Barrier or Attic Ventilation. See GAF Roofing System Limited Warranty for complete coverage and restrictions. Visit gaf.com/LRS for qualifying GAF products. For installations not eligible for the WindProven Limited Wind Warranty, see GAF Shingleand Accessory Limited Warranty, Master Flow™Ventilation Products Limited Warranty,or Master Flow™ Powered Ventilation Products Limited Warranty (depending on product) for complete coverage and restrictions.
Illustration showing how a Class 4 shingle passes an impact-resistance test while a standard shingle fails.

This product has a UL 2218 Class 4 rating

UL 2218 impact testing involves dropping various sized steel balls onto tested materials from different heights and evaluating whether there are any cracks, tears, or fractures on the back surface of the product. Products that withstand the impact of a 2-inch steel ball dropped from 20 feet receive the highest rating, UL 2218 Class 4.
About impact resistance

Product Documentation

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