Aura Gravity Ventilator with Curb Mount Flange | 4″ Diameter 8″ Tall Collar | 12 Sq. In. NFA | Model AV-4-C8-CMF

$53.00

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4 inch Aura Gravity Ventilator with Curb Mount Flange | Model AV-4-C8-CMF

The 4 inch Aura Gravity Ventilator with Curb Mount Flange is 4 inches in diameter and has an 8 inch tall collar. The model AV-4-C8-CMF has 12 inches of Net Free Area (NFA). All 4 inch gravity ventilators come with a standard 7.5 x 7.5 inch curb mount flange.

Benefits:

  • Keeps your home comfortable and energy efficient
  • Inner louvers prevent insects and animals from entering the vent
  • Round aerodynamic design can withstand harsh weather and wind forces beyond 200 mph
  • Vent head is removable for easy installation
  • Noiseless – does not require electricity to exhaust air

Installation: For low slope and flat roofs on a roof curb

This roof vent has a curb mount flange which allows for easy installation on AVP's prefabricated roof curbs. In other words, the flange will fit over roof curbs or an existing base with a 7 inch diameter.

4 inch Aura Gravity Vents are compatible with AVP's 6 inch tall and 12 inch tall roof curbs.

How it Operates:

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

Gravity vents rely on the Venturi Effect which occurs when the wind blows against the outer louvers to create an upward draft. As a result, forcing air to flow out of the vent. Thus, removing heat from the attic in the summer and moisture in the winter. This allows for year-round ventilation on low slopes or flat roofs.

Even the smallest breeze can create exhaust ventilation to draw air out of the gravity vent. Therefore, wind speeds of 11 mph for a 4 inch Gravity Ventilator produces 62 CFM of air exhaust for attic ventilation.

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.

For any questions, email the sales team at [email protected] or call at 845-565-7770. See the Roof Pitch Diagram to determine the pitch of your roof.

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Click below to see or download full technical drawing for this product

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Click below to see or download full Installation Instructions for this product

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Installation Instructionpdf file icon - click to download pdf file

Calculate number of Model AV-4-C8-CMF Vents Needed for a Given Area

Enter the Width and Length of the attic space you need to ventilate to calculate the area. You may also enter the area directly in the "Area" field. It is not necessary to hit the Return or Enter key (which will refresh this page), just enter numbers in the fields.


Enter width of space to calculate area (or enter Area below)


Enter width of space to calculate area (or enter Area below)


If you know it, you may enter the area directly here

The diameter size of all roof vents determines the Net Free Area, also known as the "NFA". NFA is the measured amount of opening each vent offers at each specific size. to be available for venting air through a specific vent size. The calculator below will find the overall number of vents needed to effectively ventilate the targeted attic space.

Once you have the area, the numbers shown below are the number of vents of that size which would ventilate the specified area with both 1/300 and 1/150 rule.

Results Appear Here





*Please note
The roof vent calculation values shown above are for the exhaust portion of the roof. The same amount of net free air inches is needed for air intake as well. Proper roof ventilation consists of 50% air exhaust and 50% air intake.


A Roof Curb below would fit this 4 inch diameter product

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Showing all 4 results

  • Roof Curb 6 inches tall for 4 inch Diameter Vents

    Roof Curb (Inside Throat Diameter: 6” Outside Length & Width: 7” Height: 6”) | Model RC-4-H6

    $18.00
    Add to cart
  • Roof Curb with Insulation - Inside Opening: 6” Outside Length & Width: 7” Height: 6” | Model RC-4-H6-Ins

    Roof Curb with Insulation (Inside Throat Diameter: 6” Outside Length & Width: 7” Height: 6”) | Model RC-4-H6-Ins

    $27.00
    Add to cart
  • Roof Curb with Insulation (Inside Throat Diameter: 6” Outside Length & Width: 7” Height: 12”) | Model RC-4-H12-Ins

    Roof Curb with Insulation (Inside Throat Diameter: 6” Outside Length & Width: 7” Height: 12”) | Model RC-4-H12-Ins

    $39.00
    Add to cart
  • Roof Curb 12 inches tall for 4 inch Diameter Vents or Fan

    Roof Curb (Inside Throat Diameter: 6” Outside Length & Width: 7” Height: 12”) | Model RC-4-H12

    $26.00
    Add to cart

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Base Price (Not Including Shipping and Options):

$53.00

Our products can be painted with a durable baked-on powder coating surface finish.
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Brand: Active VentilationUPC(GTIN): 843951011431 SKU: AV-4-C8-CMF Category:
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