Frequently Asked Questions

How do I know what size 900 Series or A Series Triangular Vent I need?
Last Updated 5 years ago

The 900 Series & A Series are both adjustable to fit various pitch settings. The 900 series will adjust from 2 1/2 - 9/12 roof pitches. The A Series will adjust from 6/12 - 12/12 roof pitches.
To determine the rough opening size for any Vari-Pitch louver, just measure down the peak of the roof, along the roof line, to determine the frame length needed. You will also need to know your pitch setting. Once you have the pitch setting and frame length, you can use the 900 Series and A-Series Vari-Pitch Louver chart to determine what louver best fits your opening size.


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