The Aura Gravity Roof Ventilator removes heat from the attic in the summer and in the winter. This allows for year-round ventilation. It functions like a spinning roof turbine but without any moving parts. Aura Gravity Ventilators rely on the Venturi Effect when wind blows against the outer louvers. As a result， this creates an upward draft allowing air to freely flow in and out of the vent. 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). The Aura Gravity Ventilator also ventilates the roof through \"The Stack Effect\". This is when hot air naturally rises out through the roof vents. The 14 inch Aura Gravity Ventilator is 14 inches in diameter and has a 2 inch tall collar. The model number is AV-14-C2 and has 144 inches of Net Free Area (NFA). All 14 inch gravity ventilators come with a standard 19″ x 19″ square flange.

Inner vertical louvers keeps insects， birds and squirrels from entering the vent allowing optimal air flow and no maintenance

Use on pitched roofs ranging between 3/12 and 12/12

Round aerodynamic design can withstand harsh weather and wind forces of up to 200 mph

Mill finish aluminum color that will continually have a long lasting clean appearance vent head is removable for easy installation

Noiseless - does not require electricity to exhaust air from attics spaces

Ventilation rule 1:300 (1 per sq. ft. of attic space): 600 sq. ft. for exhaust

Helps to reduce energy costs