Universal Dormer Vent

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

Our Universal Vent is a low profile off ridge roof vent designed for sloped roofs and can be used as an air exhaust or intake vent.

Our UL certified Universal Vent withstands wind pressure speeds up to 200 mph! Its low profile design looks great on shingled roofs as well as parapet walls. When used as an exhaust vent, it allows heat and moisture to escape. When placed at the low end of a pitched roof, it can be used as an air intake vent, similar to a soffit vent. With parapet walls, Universal vents release heat and moisture that build up within the walls, preserving the longevity of the building structure.

The inner horizontal louvers keep out rain, snow, insects and animals. This all aluminum construction will not rust, keeping a long lasting clean appearance. Because it has no moving parts, you do not have to worry about regular maintenance or part replacement. A powder coating paint option is available to match any building material.

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

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
linkedin facebook pinterest youtube rss twitter instagram facebook-blank rss-blank linkedin-blank pinterest youtube twitter instagram