Attic Vent Dimension

Enclosed attics and enclosed rafter spaces formed where ceilings are applied directly to the underside of roof rafters shall have cross ventilation for each separate space by ventilating openings protected against the entrance of rain or snow.

Attic vent dimension. If your attic is enclosed california s building code states it should have cross ventilation. See the benefits of attic ventilation a new roof is more than just shingles. Federal housing authority recommends a minimum of at least 1 square foot of attic ventilation evenly split between intake and exhaust for every 300 square feet of attic floor space. This attic vent provides maximum airflow 72 square inches of net free ventilation area nfva without detracting from the aesthetics of the roof design.

Copper as well as a variety of pre painted finishes. Dia low profile 50 sq. It comes on an easy to install flexible mesh roll and is hand nailable with no complicated fitting wrapping nail gun adapters. Active ventilation 13 in.

That is openings doors windows and louvers to the outside should create a. Allows cool dry air to enter the attic. When installed as part of a properly balanced when installed as part of a properly balanced attic ventilation system gaf cobra exhaust vent is a shingle over exhaust vent installed at the roof ridge that helps exhaust excess heat and moisture from your attic. The following product options will allow you to achieve an intake nfva of 528 square inches.

Proper attic ventilation consists of a balance between air intake at your eaves soffits or fascias and air exhaust at or near your roof ridge. Ventilation openings shall have a least dimension of 1 16 inch 1 6 mm minimum and 1 4 inch 6 4 mm maximum. Nfa roof vent in white powder coat. Choose one of the following products to meet the recommended intake nfva of 528 square inches.