Air Vent’s Hip Ridge Vent successfully passed the Miami-Dade County wind-driven rain test. By passing this stringent water leakage test, the Hip Ridge Vent is the only diagonally installed ridge vent on the market tested exactly as it will be installed on a hip roof, according to the company. It passed on 3/12 and 12/12 roof pitches; at wind speeds 35, 70, 90 and 110 mph; while facing over 1,200 gallons of wind-driven rain parallel, perpendicular and at a 45 degree angle to the vent. For more information, call 800-AIR-VENT or www.airvent.com.