This Aura Gravity Ventilator is 10 inches in diameter and has a 6 inch tall collar or neck. Model number is AV-10-C06 and has 78 inches of net free area (NFA). All 10 inch gravity ventilators come with a standard 16″ x 16″ square flange flashing.
When exhaust vents have a 6 inch tall collar or greater, (8 inch, 12 inch) they are typically used for flat or low sloped roof ventilation. Most roofs have a pitch to them, even roofs that are considered flat. For this exhaust gravity vent to work efficiently, it should be installed on the upper portion of the low sloped roof since warm air rises. This particular gravity vent can go on a 0/12 to 6/12 pitch roof. For roofs that are pitched at 8/12 or greater, please notify the sales department when ordering your vents. All vents can be modified to operate up to a 12/12 pitch, even though it would not be recommend putting an exhaust vent of this height on such a steeply pitched roof.
The Aura Gravity Ventilator works like a roof turbine but with no moving parts.
Aura Gravity ventilators rely on the Venturi Effect (the creation of an upward draft) when wind blows against the outer louvers.
Even the smallest breeze can create exhaust ventilation so that air is drawn out of the gravity vent. This movement of air is proportional to the wind speed, and is measured in cubic feet per minute (CFM). Wind speeds of 11 mph for a 10 inch Aura Gravity Ventilator, produces 248 cfm of air exhaust for attic ventilation.
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.