Aura Attic Fan | CFM: 2200 18″ Diameter 6″ Tall Collar | Model AF-18-C6


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18 Inch Aura Attic Fan | AF-18-C6 | 2,200 CFM

The 18 inch Aura Attic Fan is 18 inches in diameter and has a 6 inch tall collar. The model number is AF-18-C6 and exhausts air out at 2,200 CFM. All 18 inch gravity fans come with a standard 24″ x 24″ square flange.


The Aura Gravity Fan exhausts air continuously even when the motor is off. This attic fan works passively because of the Venturi Effect. When the wind blows against the outer louvers this creates an upward draft which allows air to freely flow in and out of the vent. This Attic Fan is also available with optional Shut-Off Switch, Thermostat and Humidistat (THSOS).

The 1/8 inch louvers are designed to prevent rain, snow, insects and animals from entering inside the fan.

Motor Type: PSC – Totally Enclosed

With 1/2 horsepower and 2,200 CFM, this 18 inch vent is perfect for ventilating attic spaces or plenums.

For any questions, please e-mail us at [email protected] or give us a call at 1-800-ROOFVENT. If you are looking to determine the pitch of your roof, see the Roof Pitch Diagram.

The Aura Attic Fan comes in an array of diameters and collar heights allowing for installation in any climate zone. See the Climate Zone Chart to determine the proper collar height for installation in your area.

How it works:

When the motor is turned off the attic fan will still ventilate passively. In other words, even the smallest breeze can create exhaust ventilation so that air is drawn out of the fan. This movement of air is proportional to the wind speed and is measured in cubic feet per minute (CFM). Therefore, wind speeds of 11 mph for an 18 inch attic fan produces 634 CFM of air exhaust for attic ventilation.

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Base Price (Before options):


Shut-off Switch Options:
SOS - Simple Shut-Off Switch
THSOS - Temperature and Humidity Sensor Shut-off Switch
TSOS - Temperature Sensor Shut-off Switch

Our products can be painted with a durable baked-on powder coating surface finish.
Click in a color square to choose a paint color.
Click "Premium Colors" to see the full set of color options.

Brand: Active VentilationUPC(GTIN): 843951000367 Model AF-18-C6 Category:
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