Replace Old Worn-Out Roof Turbines with the Aura Gravity Vent Retrofit
Retrofit Vents are available in 4 inches to 48 inches in diameter (most common sizes they fit over are 12 and 14 inches).
The Aura Gravity Vent Retrofit does not spin in order to provide excellent ventilation. Instead, it pulls hot air with its louvers because of the Venturi Effect. These vertical louvers continually exhaust air with no moving parts every time the wind blows (you can see the animation on the upper right-hand side of the page).
Hot air still escapes from the roof vent even when wind is not detected. The vertical louvers also keep out insects and animals while preventing rain and snow from entering the attic. This Aura’s round aerodynamic design can withstand wind speeds exceeding 200 mph (make sure your turbine base is in good condition).
Not only does the Aura Gravity Ventilator remove hot air in the summer but also moist wet air from the attic in the winter. This provides the home with optimal year-round ventilation. Retrofit Vents fit over existing bases of the same diameter.
| Diameter | Aura Ventilator Retrofit Model |
|---|---|
| 4" Diameter | AV-4-RF |
| 6" Diameter | AV-6-RF |
| 8" Diameter | AV-8-RF |
| 10" Diameter | AV-10-RF |
| 12" Diameter | AV-12-RF |
| 14" Diameter | AV-14-RF |
| 16" Diameter | AV-16-RF |
| 18" Diameter | AV-18-RF |
| 20" Diameter | AV-20-RF |
| 24" Diameter | AV-24-RF |
| 30" Diameter | AV-30-RF |
| 36" Diameter | AV-36-RF |
| 42" Diameter | AV-42-RF |
| 48" Diameter | AV-48-RF |
Roof turbine parts wear out, even if they are balanced perfectly. If a roof turbine is making noise, it is slowing down because it is wearing out. When it slows down, it is likely to start allowing rain and snow into the attic. For any questions please email [email protected] or call at 1-800-ROOFVENT.
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.
