20 inch Aura Ventilator, 4 inch Collar - 20 inch inside diameter Aura Ventilator with a 26 x 26 inch base flange, 4 inch collar height. Intake/Exhaust vent for all types of roofs. All aluminum, mill finish. Price/Each. (shipping leadtime 2 business days)
20 inch Aura Ventilator, 4 inch Collar
$366.00 SALE $261.95
(Savings: $104.05)
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Aura AV-20-C4, 20" inside diameter Aura Ventilator with a 26" x 26" base flange, 4" collar height. Intake/Exhaust vent for all types of roofs. All aluminum, mill finish. Price/Each.

Ordering Notes:

  • Shipping Leadtime: 2 business days.


Aura Roof Ventilator 20″ Diameter Aluminum Gravity Vent with a 4″ Collar Height and 26″ x 26″ Square Flange. The model AV-20-C4 has 314 square inches of Net Free Air Space. It is best used for flat roof applications up to 5/12 roof pitch without modification. Adaptable up to 12/12 roof pitch. This vent contains no moving parts The Venturi effect is stimulated by even small breezes and creates a positive movement of air out of the vent without the need of any part of the vent to move.


For tile, Shingle or foam roofs.

Permanent replacement for wind turbine ventilators

For maximum roof pitch of 5/12


  • Effectively draws out air from the attic without moving parts
  • Vent comes with a square base for easy roof installation
  • Remove the square base so the Aura Vent can be retro-fitted onto turbine bases and vent pipes
  • Lowers energy costs during winter & summer
  • Tested for Texas Insurance, at wind speeds exceeding 200 mph
  • Coverage: 1 per 1308 sq.ft.
  • Net free vent area 314 sq.in.
  • Height of head 9"
  • All Aluminum -- very rust and corrosion resistant
  • UL and Florida Building Code Certified
  • Made in USA
  • Installation Note: The Aura Ventilator does not need an adjustable base. It can be installed parallel to the roof for a lower profile.


  • Sizes: Available in 4” to 48” inside diameters, effective net free areas of 12 to 1808 square inches)
  • Curbs: Roof Curb or Curb Mount Flange

More Product Information:


Email us at sales@bestmaterials.com or
Call us at 1-800-474-7570 or 602-272-8128
You'll get a prompt reply!

similar product terms: roof vents, aura vent, house roof vent, turbine roof vent, wind turbine vent, roof ventilators, attic vent, attic ventilator, whirley vent, roof ridge vent, roof ventilation, active ventilation products inc, av-4-c6

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