Aura Gravity Ventilator | 4″ Diameter 2″ Tall Collar | 12 Sq. In. NFA | Model AV-4-C2


Image Gallery
Florida Approval
Texas Approval
UL Certification
Add To Cart
Florida Approval by the Department of Business and Professional Regulation
Certification from Underwriter Laboratories - Our Roof Vents are UL Certified

This product has UL Certification. Check out other details and specifics on UL Product IQ™ (Note: UL now requires you to have a free account to access this page) UL’s Online Certifications Directory.

The 4 inch Aura Gravity Ventilator AV-4-C2 with a 2 inch tall collar provides 2 inches of clearance between the base and the inner louvers of the vent. The AV-04-C2 and has 12 inches of net free area (NFA), and comes with a standard 10″ x 10″ square flange flashing.

If the exhaust vent is installed on the upper portion of the roof (no more than 2 feet down from the peak) then this Aura Vent can handle all climate zones as referenced on the zone chart. 4 inch Aura Vents can go on a 3/12 to 7/12 pitched roof but can be made to go onto roofs that have a 12/12 pitch. The sales department needs to be notified at the time of quoting or ordering if the intended roof vents are going to be installed on a roof pitch higher than 7/12.

The Aura Gravity Ventilator works like a roof turbine but with no moving parts.

Aura Gravity ventilator relies on its large outer louvers (fins) to create the “Venturi Effect” (the roof vent brings about an upward draft causing dynamic ventilation) when wind blows against the roof.

Even the smallest breeze can create exhaust ventilation so that air is drawn out of the gravity vent. This movement of air is proportional to the wind speed, and is measured in cubic feet per minute (CFM). Wind speeds of 11 mph for a 4 inch Aura Gravity Ventilator, produces 62 cfm of air exhaust for attic ventilation.

Listed below are the Engineering Benefits of the Aura Gravity Ventilator’s Multi Louver Design.

  • Dynamically ventilates hot attics
  • Helps prevent ice damming
  • Louvers enhance airflow
  • Prevent insects and animals from entering
  • Wind driven rain and snow will not get passed the three rows of engineered louvers
  • Used to exhaust bathroom fans or range hoods
  • Available in colors


All of AVP’s roof vents can be fitted with tail pipe adapters if exhausting out a duct system is needed, or the gravity vent can be made with a curb mount flange to fit over a roof curb.

Aura Gravity Vents are UL Listed and rated up to 50+ PSF or wind pressure above 200 MPH.  Certified by Texas Department of Insurance, Florida State Approved & Conforms to the Standards of CALFIRE.

Color Chart

Aura Gravity Roof Ventilator - Technical Drawing Downloads

Product LinkDrawing- Unmarked
Drawing- Measurements
Drawing- Cutaway
AV-4-C2dwg file icon - click to download CAD (dwg) fileunmarked drawingpdf file icon - click to download pdf filedwg file icon - click to download CAD (dwg) fileWith Measurements drawingpdf file icon - click to download pdf filedwg file icon - click to download CAD (dwg) fileCut Away and Measurements drawingpdf file icon - click to download pdf file

Aura Roof Vent - Installation Instructions

Product LinkInstallation Instructions - Shingled Roof - pdfInstallation Instructions- Flat Roof - pdf
AV-4-C2 Installation Instructions pdf file icon - click to download pdf fileN/A

Select Options and Click "Add To Cart" button below

Base Price (Before options):


Model AV-4-C2 Category:
Copyright Active Ventilation Products, Inc. 2021 - All Rights Reserved
linkedin facebook pinterest youtube rss twitter instagram facebook-blank rss-blank linkedin-blank pinterest youtube twitter instagram