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

¹Impact resistance test modeled after UL 2218 Class 4 Standard for Impact Resistance of Prepared Roof Covering Materials was performed by Certerra Analytical - PRI under controlled laboratory conditions. This product is not listed or classified for impact resistance by any testing agency. GAF makes no express or implied warranty about the impact performance of this product against hail. Hail damage is not covered under the limited warranty. See applicable GAF Master Flow™ Limited Warranty available at gaf.com for complete coverage and restrictions.

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.
View Rewards

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 passes impact resistance testing modeled after the UL 2218 Class 4 test*

This impact testing involves dropping a 2-inch steel ball from 20 feet and checks for cracks through the material.
About impact resistance
*Impact resistance test modeled after UL 2218 Class 4 Standard for Impact Resistance of Prepared Roof Covering Materials was performed by Certerra Analytical - PRI under controlled laboratory conditions. This product is not listed or classified for impact resistance by any testing agency. GAF makes no express or implied warranty about the impact performance of this product against hail. Hail damage is not covered under the limited warranty. See applicable GAF Master Flow™ Limited Warranty available at gaf.com for complete coverage and restrictions.

Product Documentation

View All Documents