www.roofingcontractor.com/articles/88566-one-sided-ridge-vent

One-Sided Ridge Vent
DCI Products
February 16, 2012
have. In addition to the aesthetic appeal, the ridge vent is 100 percent efficient. Because of the one-sided lift, the SmartRidge I creates negative air pressure, like a vacuum, which pulls only the hot, moist air out of the attic. For more information, visit www.dciproducts.com or stop by booth 553.