Products / GAF Master Flow Roof Louver RT65 Plastic Square-Top

The Master Flow RT65 is a static plastic square-top utility roof vent made of UV-resistant polymer, with pre-drilled nail holes and an extra-wide flashing area; GAF says it helps resist scratches and dents. GAF lists 60 sq. in. of net free area per vent, but prints two different metric equivalents for that figure on the same page (41,395 mm2 in the overview and 41,935 mm2 under features). It comes in four colors, is an eligible accessory in the attic ventilation category of GAF's enhanced and WindProven limited warranties, and the page lists a code document titled "Master Flow Louver Vents RV-61." GAF notes that exhaust ventilation should never exceed intake ventilation.