Universal Vents

The Universal Vent is a versatile air intake or exhaust for shingled roofs Shown in Brown on Shingle Roof

The Universal Vent is a low-profile off ridge roof vent for sloped roofs or parapet walls. Can be used as both an exhaust or intake vent.

The Universal Vent is an off ridge vent that can act as an exhaust or intake vent. To clarify, an off ridge vent is a UV-resistant static vent suitable for installation on sloped roofs or parapet walls.

This vent is capable of installation on roofs with a pitch of 3/12 or greater. If installed on the upper portion of the roof, this vent can be used as an exhaust vent because it's engineered to allow heat and moisture to escape. However, when placed on the lower end of a pitched roof it can be used as an air intake vent similarly to a soffit vent.

This vent is also excellent for ventilating parapet walls because it will allow the buildup of heat and moisture within the wall to escape.

This vent is ideal for proper attic ventilation. The 1/8 inch opening between the horizontal louvers blades will keep out precipitation and wildlife while allowing air to move freely. In addition to its functionality, it has a low-profile design that looks pleasing on shingled roofs and parapet walls. The hooded vent design and horizontal louvers will keep out rain and snow. Powder coating is available to match the color of your roof.

Net Free Area
in Sq. In.
Overall Length
UV-151523 in
UV-303031 in
UV-454539 in
UV-606047 in
UV-757555 in
UV-909063 in
Universal Vents - Parapet Wall Vents
Installation of Universal Vents on Parapet Walls for optimal ventilation. 

For any questions please see the frequently asked questions page. If you still have questions, email the sales team [email protected] or call 845-565-7770. If you are looking to determine the pitch of your roof, see the Roof Pitch Diagram.

Calculate Universal Dormer Vent Ventilation for given area

Enter below the Width and Length of the attic space you intend to ventilate. You may also enter the size of the attic directly in the "Area" field at the bottom.

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, pulldown to select the specific vent diameter to show the number of vents of that size which would ventilate the specified area with both 1/300 and 1/150 rule.

*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.

UL Certificate of Compliance Active Ventilation Products Universal Vent

Our Universal Vents have 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.

Copyright Active Ventilation Products, Inc. 2021 - All Rights Reserved
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