The Cobra Hip Vent from GAF has a low 5/8-inch profile and still provides nine square inches of net-free ventilation per linear foot. A Dual Weather Fighter filter keeps out rain and snow, and the vents can be applied without any caulk.
A box of 10 costs about $90 and includes three coils of 1 3/4-inch nails. For more information, go to gaf.com
