Active Ventilation 740 CFM Mill Finish 10-Watt Solar Powered 12 in. Dia Retrofit Attic Roof Fan ASF-12-RF

Active Ventilation Products Aura Solar Attic Fan Retrofit product line is designed to fit over a turbine ventilator roof base. It has a flared adapter that easily fits over an existing roof mounted metal base. The Aura Solar Attic Fan Retrofit will exhaust air continuously by using solar and wind power for optimum ventilation performance. Model ASF-12-RF has a 12 in. Dia throat opening and a 10-Watt solar panel providing energy to 4 EC fans on sunny days to increase the CFM (Cubic Feet per Minute) of 740 at 0.1 SP of air flow performance. It is an excellent choice to exhaust attic heat in the summer and exhaust moisture in the winter. The Aura Solar Attic Fan Retrofit will produce 310 CFM at 11 mph without the solar powered fans through its patented engineered design with no moving parts. The attic fan is made of durable rust free aluminum and has 4 manufactured components: The vent head， 4 - EC fans， 1 - solar panel and adapter. The vent head's patented design has three concentric cylinders with slotted vertical louvers. When air moves against the louvers of the outer and middle cylinders it is directed to create a circular airflow. The louvers of the inner cylinder face in the same direction as the air movement created by the outside cylinder. This air movement creates a Venturi effect which produces a vacuum or negative pressure to pull air from within the attic space.

No assembly required， comes complete and ready to be installed

Fits over an existing 12 in. Dia metal roof base

No wiring or batteries required， operates on solar and wind energy

Does not require an electrical connection to exhaust air from attics spaces

Solar panel operates at 12-Volt

Solar panel is manufactured tempered glass; rugged design to withstand high wind pressure， hail and snow load; providing exceptional panel rigidity

Quiet fan operation; designed to run up to 40，000 life hours per fan

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

Works 24/7 to help to reduce energy costs even after the sun sets or on cloudy days

Will reduce attic temperatures in the summer and will keep the attic dry and cool in the winter to preserve attic insulation and prevent ice dams

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

Vent head has a flat one piece spun cap that prevents rain and snow from entering

Pitch capacity range: 0/12 to 12/12

Net free air: 113 sq. in. (0.78 sq. ft.)

Ventilation rule 1:300: 1 unit per 450 sq. ft. of attic space (maximum up to 750 sq. ft.)

Mill finish aluminum will continually have a long lasting clean appearance

Screws are not included