Ventamatic Cool Attic 15" Galvanized Steel Black Static Roof Mount Attic Vent

Large, low profile, round static roof mount attic exhaust ventilator. Galvanized steel construction. Suitable for up to 8/12 roof pitch. Includes galvanized steel mesh grill to protect against insects, birds, and rodents, yet allows adequate air intake. Moves 28% more air than a wind turbine. Easy installation with no special tools required. 163 sq in (square inch) Net Free Area (NFA). 26" diameter dome. Base: 25" x 25". Opening: 15" diameter. Requires adequate soffit intake vents.