Products / GAF Master Flow Roof Louver IR61 Low-Profile Plastic Slant-Back

The Master Flow IR61 is a low-profile static plastic slant-back roof louver made of UV-resistant polymer that GAF says helps it keep its color, with a sleeker finished look than taller louvers. Each vent provides 37 sq. in. of net free area, and it has pre-drilled nail holes with an extra-wide flashing area. 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.