RBV-3-C4 | Round Back Vent | 3″ Diameter 4″ Collar
Round Back Roof Ventilator 3″ Diameter Aluminum Gravity Vent with a 4″ Collar Height and 8″ x 8″ Square Flange. The model RBV-3-C4 has 7 square inches of Net Free Air Space. It is best used for 3/12 up to 12/12 roof pitch. These vents are rated for up to 200 MPH winds by Texas Insurance. They are certified by UL as well as Florida Building Code, the toughest in the nation. Being constructed entirely out of aluminum makes our roof vents highly resistant to rust and corrosion. In addition, they are insured for up to 5 years. Powder-coating is available in a wide variety of colors, including special textures.