The Aura Gravity Roof Ventilator removes heat from the attic in the summer and moisture in the winter. This allows for year-round ventilation. It functions like a spinning roof turbine but without any moving parts. Commercial Gravity Ventilators rely on the Venturi Effect. This is when the wind blows against the outer louvers to create an upward draft. As a result, allowing air to freely flow out of the vent. Even the smallest breeze can create exhaust ventilation to draw out air. This movement of air is proportional to the wind speed and is measured in cubic feet per minute (CFM).
This roof vent also ventilates the roof through “The Stack Effect”. This occurs when the outside temperature is cooler than the inside temperature. The hot air will naturally rise and escape through the roof vents.
Roof turbines spin in order to prevent rain from entering. However, these will eventually rust and wear out. The Aura Gravity Ventilators never rust and do not spin. Instead, the Aura Vents have double louvers pressed together to prevent rain and wildlife from entering. They are also constructed of durable rust-free aluminum.
The Aura Vent with Curb Mount Flange will fit over Roof Curbs. AVP offers roof curbs in 6" tall, 12"tall and 18" tall. This allows for additional height to protect the vent. In addition, it also allows for installation on flat roofs.
The 1/8 inch louvers will prevent precipitation and wildlife from entering inside the roof vent.
 Diameter |  CMF Width |  4" Tall Collar |  6" Tall Collar |  8" Tall Collar |  12" Tall Collar |
|---|---|---|---|---|---|
| 4" | 7.5" | AV-4-C4-CMF | AV-4-C6-CMF | AV-4-C8-CMF | AV-4-C12-CMF |
| 6" | 9.5" | AV-6-C4-CMF | AV-6-C6-CMF | AV-6-C8-CMF | AV-6-C12-CMF |
| 8" | 11.5" | AV-8-C4-CMF | AV-8-C6-CMF | AV-8-C8-CMF | AV-8-C12-CMF |
| 10" | 13.5" | AV-10-C4-CMF | AV-10-C6-CMF | AV-10-C8-CMF | AV-10-C12-CMF |
| 12" | 16" | AV-12-C4-CMF | AV-12-C6-CMF | AV-12-C8-CMF | AV-12-C12-CMF |
| 14" | 18" | AV-14-C4-CMF | AV-14-C6-CMF | AV-14-C8-CMF | AV-14-C12-CMF |
| 16" | 20" | AV-16-C4-CMF | AV-16-C6-CMF | AV-16-C8-CMF | AV-16-C12-CMF |
| 18" | 22" | AV-18-C4-CMF | AV-18-C6-CMF | AV-18-C8-CMF | AV-18-C12-CMF |
| 20" | 24" | AV-20-C4-CMF | AV-20-C6-CMF | AV-20-C8-CMF | AV-20-C12-CMF |
| 24" | 28" | AV-24-C4-CMF | AV-24-C6-CMF | AV-24-C8-CMF | AV-24-C12-CMF |
| 30" | 34" | AV-30-C4-CMF | AV-30-C6-CMF | AV-30-C8-CMF | AV-30-C12-CMF |
| 36" | 40" | AV-36-C4-CMF | AV-36-C6-CMF | AV-36-C8-CMF | AV-36-C12-CMF |
| 42" | 46" | AV-42-C4-CMF | AV-42-C6-CMF | AV-42-C8-CMF | AV-42-C12-CMF |
| 48" | 52" | AV-48-C4-CMF | AV-48-C6-CMF | AV-48-C8-CMF | AV-48-C12-CMF |
Aura Gravity Vents are UL Listed and rated up to 50+ PSF or wind pressure above 200 MPH. Certified by Texas Department of Insurance, Florida State Approved & Conforms to the Standards of CALFIRE.
For any questions please see the frequently asked questions page. If you still have questions, email the sales team [email protected] or call 845-565-7770. If you are looking to determine the pitch of your roof, see the Roof Pitch Diagram.
The diameter size of all roof vents determines the Net Free Area, also known as the "NFA". NFA is the measured amount of opening each vent offers at each specific size. to be available for venting air through a specific vent size. The calculator below will find the overall number of vents needed to effectively ventilate the targeted attic space.
Once you have the area, pulldown to select the specific vent diameter to show the number of vents of that size which would ventilate the specified area with both 1/300 and 1/150 rule.
*Please note
The roof vent calculation values shown above are for the exhaust portion of the roof. The same amount of net free air inches is needed for air intake as well. Proper roof ventilation consists of 50% air exhaust and 50% air intake.
