800 CFM Power 12 in. Dia Aura Exhaust Attic Fan with 6 in. Collar
WEB14 in. Dia 1000 CFM Power Mill Aura Attic Fan with 6 in. Collar (2) 275. 85. Power Type. Electric Powered. Solar Powered ... 1 solar panel, vent collar and square flange. It has a 12 in. Dia throat opening with a 2 in. collar height and a 18 in. x 18 in. square flange. ... This air movement creates a Venturi effect which produces a vacuum ...