18 inch Roof Vent | Aura Gravity Ventilator | Model AV-18-C4
The 18-inch Aura Gravity Ventilator is 18 inches in diameter and has a 4-inch tall collar. The model AV-18-C4 has 254 inches of Net Free Area (NFA). All 18-inch gravity ventilators have a standard 23" x 23" square flange flashing.
Benefits:
- Keeps your home comfortable and energy-efficient
- Removes hot air during the summer and moist air during the winter from the attic
- Prevents rain & snow, insects & animals from entering the vent
- Aerodynamic design withstands harsh weather and wind forces beyond 200 mph
- The vent head is removable for easy installation
- Noiseless – does not require electricity to exhaust air
Where to Install:
This large vent is only for asphalt shingle roofs. If installed 4 feet from the peak, it can be used in all climate zones. Designed to go on a roof with a pitch of 3/12 to 6/12, the vent can also be used on a 12/12 pitch roof in all climate zones with modification. See the installation guides for help installing.
The Aura Vent is ideal for ventilating roofs. It removes heat during the summer and moisture during the winter to provide the necessary ventilation all year. Keeping the attic dry during the winter preserves attic insulation and prevents ice dams.
18-inch diameter roof vents are considered commercial size and should be used in commercial settings. For those looking to ventilate their homes, please view roof vents with a smaller diameter.
How it Operates:
The Aura Gravity Ventilator works like a roof turbine with no moving parts.
Aura Gravity Ventilators rely on the Venturi Effect, which occurs when the wind blows against the outer louvers. This creates a spinning upward draft through the vent, allowing air to flow dynamically. Even the slightest breeze can create exhaust ventilation to draw out air from the attic.
The Aura Gravity Roof Vents are made of durable, rust-free aluminum. The vent head has a flat one-piece spun lid that prevents rain and snow from entering the vent. The round aerodynamic design can withstand harsh weather and wind forces beyond 200 mph. Therefore, wind speeds of 11 mph for an 18-inch Gravity Ventilator produce 634 CFM of air exhaust for attic ventilation.
The inner louvers of the roof vent prevent insects and animals from entering the attic. The louvers also allow the air to flow freely to the outside.
AVP’s Aura Gravity Vents are UL-listed, rated up to 50+ PSF or wind pressure above 200 MPH, and certified by the Texas Department of Insurance & Florida State Approved.
If you have any questions, please see the frequently asked questions page. If you still have questions, email the sales team at sales@roofvents.com or call 845-565-7770.
