1Always have a balanced ventilation system consisting of both intake and exhaust ventilation. In no case should the amount of exhaust ventilation at or near the ridge exceed the amount of intake ventilation at or near the soffit. Consult local building codes for specific ventilation requirements in your area. Visit www.gaf.com/ventcalculator for further details.
2 Contractors enrolled in GAF certification programs are not employees or agents of GAF, and GAF does not control or otherwise supervise these independent businesses. Contractors may receive benefits, such as loyalty rewards points and discounts on marketing tools from GAF for participating in the program and offering GAF enhanced warranties, which require the use of a minimum amount of GAF products.
3 See GAF System Plus, Silver Pledge™, and Golden Pledge® Limited Warranties for complete coverage and restrictions. When not eligible for coverage under GAF enhanced warranties, see Master Flow® Ventilation Products Limited Warranty, Master Flow® Powered Ventilation Products Limited Warranty or Master Flow® Wi-fi Attic Vent Limited Warranty (depending on product) for complete coverage and restrictions.