grainger cool attic ventilator vent


GAf Masterflow 12 inch Roof Ventilator

The Masterflow vent from GAF is a rotary turbine that comes constructed from durable galvanized steel. Steel construction ensures that the ventilator is able to withstand weather conditions while delivering a reliable performance.

The throat size of the Masterflow vent is 12 inches. This makes it suitable for both domestic and commercial use. The vent is effective enough to ventilate roof space and remove both humidity and heat.

GAF offers the Masterflow vent in internally braced and externally braced models. The internally braced model comes with convex top and double-ribbed vanes. The aerodynamic design of the vent allows it to rotate even in very low wind speeds and achieve effective ventilation.

GAF has used upper and lower stainless steel bearings inside this vent. These offer a noise-free and super-smooth rotation. The self-lubricating bearings require little to no maintenance on your part and offer an exceptionally long life.

GAF Masterflow 12-inch is a great way of reducing the energy costs of your home. During the summers, the vent removes hot air trapped near the ceiling space. This keeps the indoor temperatures low and reduces the load on your air-conditioning system. In winters, the vent removes moisture-laden air that rises towards the ceiling. This prevents potential damage to the roof structure and also keeps the indoor air dry for easy heating.

The 12-inch model is available in a number of colour options including black, mill and weathered wood. Its overall dimensions are 18” x 18” with a base size of 12 inches. For most buildings, GAF offers a lifetime warranty on the 12-inch Masterflow vent. In some cases, the company offers a 40-year warranty.


  • Wind-driven turbo ventilator
  • 12-inch throat size
  • Sturdy galvanized steel construction
  • Upper and lower stainless steel bearings
  • Overall dimensions of 18”x18”
  • Zero ongoing energy costs

North American Vents

23  –  Lomanco Tile Turbine

24  –  Lomanco Wall Weather

25  –  Airvent Airhawk

26  –  Airvent Power-Attic Vent

27  –  Grainger Empire Vent

28  –  Grainger Cool Vent

29  –  GAF Masterflow 12″

30  –  GAF Power Attic Vent

31  –  Luxury Metals Vent

32  –  Luxury Metals Galvanized Vent

33 –  Luxury Metals Aluminium Vent

34 –  Luxury Metals Copper Vent

35 –  Home Depot Roof Vent

36 –  Home Depot Roof Vent 12″

37 –  Moffitt Corp Greenroo Vent


about us

We have been in business for over 30 years as a commercial & residential roofing company. RVA is the sister company of Sydneyroof.  At RVA we are focused on Industrial & Domestic roof ventilation, fibreglass skylight panels, and roofing utilities. We believe these areas of the roofing industry have been largely marginalised.  We however, are focused on taking this part of the industry and creating a service-oriented response to our customer's needs.

Why Us?

Competitive Prices

Our pricing is transparent and highly competitive. We do our best to take the guesswork out of the final cost at the beginning.


We take pride in our workmanship and are proud to warranty our workmanship for 5 years, in addition to the manufacturer's warranty.

Over 30 Years Experience

Nothing says commitment like longevity! We are proud of our commitment to our craft and our customers.