A: All of our vents have to be installed on a 3/12 pitch and higher. Thank you!
A: I have gotten my engineer involved since I do not know the formula. As soon as they get back to me, I will add to this response. Thank you!
A: 132 square inches probably refers to the area of the exit vents on the spinning top. The 14" inlet diameter provides slightly more than that, 154 in^2 (Pi x radius^2 = 3.14x7x7)
A: As long as the turbine spinning, the turbines are rainproof. If the head is not spinning, the turbine is not rain proof. Thank you!
A: Please call 800-527-1924 Monday-Friday 7:30 am-4:00 pm central time to talk to customer service to help with the issue of the vent not spinning. Thank you!
|Brand||Master Flow||Air Vent||Master Flow||Air Vent|
|Name||12 in. Weathered Wood Galvanized Internally Braced Dual-Bearing Wind Turbine||14 in. Brown Aluminum Internally Braced Wind Turbine||14 in. Aluminum Internally Braced Dual-Bearing Wind Turbine in Black||12 in. Black Aluminum Internally Braced Wind Turbine|
|Bracing||Externally Braced||Internally Braced||Internally Braced||Internally Braced|
|Features||Dual Bearing||UV Resistant,Weather Resistant||Dual Bearing||UV Resistant,Weather Resistant|
|Net-Free Area (Sq. In.)||60||132||120||95|
|Mounting Position||Roof Mount||Roof Mount||Roof Mount||Roof Mount|
|View Product||View Product||View Product||View Product|