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Roof Ventalation Calculator

Enter your attic square footage or length and width to determine your ventilation needs.

Attic Square Feet:    

- OR -

Length x Width:   x  
FOR RIDGE VENT ONLY:   

Trimline Multi Roll Vent intake calculator

If your home does not have enough soffit ventilation to create a balanced system consider using Trimline Multi Roll Vent for on the roof intake. For homes that have no overhang or soffit ventilation, use Trimline Multi Roll Vent. Multi Roll Vent can be installed in the lower 1/3 of the roof

Vent Calculator Diagrams
Vent Calculator Diagrams