Aura Solar Exhaust Fan with Curb Mount Flange | CFM: 91 4″ Diameter 12″ Tall Collar ASF-04-C12-CMF
Basic dimensions of the Aura Solar Fan and it’s identifying attributes. Primary identifying dimensions of vents and fans are the inside diameter of the Head, which equals the diameter of the hole being vented, and the height of the Collar which is the solid tube between the Head of the vent and the Flange which attaches to the roof.
Louvers are the vertical openings in the vent, which facilitates the flow of air, while keeping animals, insects, debris, and embers out. The combination of inner and outer Louvers on our patented “Aura” series of vents and fans are shaped to create a positive vacuum effect which draws air out of the vent, utilizing a physical principle known as the Venturi effect.
How much clearance (vent height) your roof vent needs depends on the pitch of your roof and the climate zone you live in. If you have a 4/12 roof pitch or greater, you can have a low profile vent (1” 2” tall collar) in all climate zones. At a 3/12 roof pitch you can have a 1” or 2” tall collar in zones 1, 2, 3. Having a 3/12 roof pitch in zones 4, 5, 6, 7, 8 you will need a 4” tall collar. For roof pitches 2/12 or less you will need a 4” tall collar in zones 1 & 2. You will need a 6 inch tall collar for zones 3, 4 and an 8” tall collar for zones 5 and 6. You will need an 11″ or 12” tall collar for zones 7 and 8. Bear in mind, you can always use taller collars for additional clearance in warmer zones, but you can’t use shorter collars in colder zones when dealing with low slope roofs. Custom collar heights are also available.
Installation Guides Under Development. Coming Soon.
This is a premium exhaust fan, with a flange for easy mounting onto a roof curb, ideal for flat industrial roofs. Even when the power is off, it is activated by even a small breeze to forcefully evacuate air using the Venturi effect. All Aura Vents and fans use louver technology to keep your property safe, comfortable, and energy efficient.
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