Pop Vent Commercial Roof Louver Air Intake with Curb Mount Flange | 20″ Diameter 12″ Tall Collar | 314 Sq. In. NFA | Model PV-20-C12-CMF


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The Roof Louver Air Intake with Curb Mount Flange| Pop Vent | PV-20-C12-CMF

The 20 inch Pop Vent Air Intake Vent with Curb Mount Flange is ideal for maintaining proper roof top ventilation. The PV-20-C12-CMF is 20 inches in diameter with a 12 inch tall collar. In other words, this vent has 12 inches of clearance between the base and the inner louvers. In addition, the 20 inch Pop Vent has 314 inches of Net Free Area (NFA) and a standard 24” x 24” curb mount flange.

Installation: Ideal for low slope or flat roofs

20 inch diameter roof vents are considered commercial size therefore should be used in commercial settings. For those looking to ventilate their homes, please view roof vents with a smaller diameter.

This attic vent is suitable for installation in all climate zones if installed on a roof curb. We offer roof curbs to insure that your vent will fit over the curb seamlessly. The Pop Vent comes in an array of diameters and collar heights to fit the needs of your roof. See the Climate Zone Chart to determine the proper collar height for installation in your area.

Because of the Curb Mount Flange, this vent can be used as a hatch to access the duct work or attic below without damaging the roof.

The Pop Vent allows fresh air to enter the attic or plenum. To determine the number of vents you may need for proper attic ventilation, see our Vent Calculator.

For any questions please email us at [email protected] or give us a call at 1-800-ROOFVENT. If you are looking to determine the pitch of your roof, see the Roof Pitch Diagram.

How it works:

The Air Intake Roof Louver provides fresh air into the attic or plenum.  Without proper rooftop ventilation, heat and moisture can get trapped in the attic which may cause decay of the structure. This attic vent also helps to keep insulation dry in the winter to prevent the growth of mold. Additionally, the round design is aerodynamic to withstand wind speeds up to 200 mph. The 20 inch Pop Vent is great for commercial roof applications because of its diameter. It can also be painted to match the color of the asphalt shingles.

Color Chart

Pop Vent Commercial Roof Louver Air Intake with CMF - Technical Drawing Downloads

Product LinkDrawing- Unmarked Drawing- Measurements Drawing- Cutaway
PV-20-C12-CMFdwg file icon - click to download CAD (dwg) fileunmarked drawingpdf file icon - click to download pdf file
dwg file icon - click to download CAD (dwg) fileWith Measurements drawingpdf file icon - click to download pdf file
dwg file icon - click to download CAD (dwg) fileCut Away and Measurements drawingpdf file icon - click to download pdf file

Pop Roof Vent - Curb Mount Flange Installation Instructions

Product LinkInstallation Instructions - pdf
PV-20-C12-CMFInstallation Instructionpdf file icon - click to download pdf file

Calculate number of Model PV-20-C12-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.

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Our products can be painted with a durable baked-on powder coating surface finish.
Click in a color square to choose a paint color.
Click "Premium Colors" to see the full set of color options.

Brand: Active VentilationUPC(GTIN): 843951011844 Model PV-20-C12-CMF Category:
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