The 8 inch Round Back Solar Attic Fan is 8 inches in diameter and has a 4 inch tall collar. The model number is RBSF-8-C4 and exhausts air out at 365 CFM. The 8 inch solar round back fan comes with a standard 13” x 13” square flange.
The Round Back Solar Fan uses both solar and wind to power the ventilator. It exhausts air continuously even when there is no sun and the motor is off. It works passively because of the Venturi Effect. When 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 an optional Shut-Off Switch.
If installed on the upper portion of a roof with a pitch of 3/12 or greater this fan can be installed in all climate zones.
The 1/8 inch louvers are designed to prevent rain, snow, insects and animals from entering inside the fan.
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).
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