The 8 inch Aura Attic Fan is 8 inches in diameter and has a 4 inch tall collar. The model number is AF-8-C4 and exhausts air out at 250 CFM. All 8 inch gravity fans come with a standard 13″ x 13″ square flange. This version is not used with the Economizer Ventilation system.
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 attic fan.
This Attic Fan is also available with an optional Shut-Off Switch, Thermostat, and Humidistat (THSOS).
With 1/55 horsepower and 250 CFM, this 8 inch attic fan is perfect for ventilating smaller attic spaces.
The 8 inch attic fan will remove heat from the attic during the summer. In addition, it will also remove moisture during the winter.
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 8 inch attic fan produces 185 CFM of air exhaust for attic ventilation.