Active Ventilation 8 in. Diameter Aluminum Round Back Roof Jack in Mill Finish with 4 in. Collar and 2 in. Tail Pipe

The Round Back Roof Jack is used for ventilating bathroom fans or other duct applications. In addition, the round design is aerodynamic to withstand wind speeds up to 200 mph. It allows for maximum air to flow while alleviating back pressure. Most importantly, this Roof Jack comes in an array of sizes with optional curb mount flange for additional clearance.The Round Back Roof Jack is engineered to stop insects and wildlife from entering the duct. It is also designed to prevent rain or snow from entering. See the Climate Zone Chart to determine the collar height for your area. These vents have an all-aluminum construction.The RBV-8-C4-TP is the Round Back Roof Jack with an 8 inch inner diameter and 4 inch tall collar. In addition, it also has a 2 inch tailpipe that can be used for duct ventilation. It is mainly used to ventilating bathroom fans and range hoods. The 8 inch roof jack allows for maximum air flow while alleviating back pressure.

• Great for exhausting bathroom fans, range hoods in the kitchen and more, fits existing ductwork
• Mill finish aluminum will continually have a long lasting clean appearance
• Built-in inner vertical louver cylinder has a 1/8 in. opening between louver blades that will keep out insects, birds, and animals while allowing air to move through the vent without resistance
• Round design provides for excellent air flow and maximum wind strength
• 2 in. clearance between bottom of vent cap and flange
• 1/8th in. opening between the louver blades and all aluminum (non-combustible) material meets the requirements of California building code 706A.2 vents to resist the intrusion of burning embers and flame through ventilation openings
• Helps to reduce energy costs by removing heat in the summer and excess moisture in the winter