Why Aren't Roof Vent Lid Covers As Tall as Roof Lid When Fully Opened

Updated 05/09/2017 | Published 05/08/2017

Question:

Need a vent cover that is 11.5 inches high. Do they make one? Our bathroom vent with fan opens to 11.5 inches from trailer roof.

asked by: Bill

Helpful Expert Reply:

Roof vent covers like the part # CAM40421 aren't as tall as a roof vent lid when fully opened because with the vent style these fit the vent is basically at full functionality when the lid is only partially opened. In general these vents do not flow a crazy amount of air so the lid being opened at a lower angle wouldn't flow any less air than one opened all the way up.

expert reply by: Jameson C