Lomanco Roof Vent Calculator

Federal housing authority recommends a minimum of at least 1 square foot of attic ventilation for every 300 square feet of attic floor space evenly split between intake and exhaust.

Lomanco roof vent calculator.

For balanced ventilation an equal amount of intake vent area net free area should also be installed. Let owens corning roofing help you calculate exactly how much ventilation you will need for a healthy and balanced attic with our 4 step ventilation calculator. Determine square feet of code required ventilation. Use the calculator below to find out how many exhaust and intake vents you will need on your house.

All lomanco attic ventilation product requirements are based on the minimum standard 1 300 rule as set forth by the international building code ibc and the international residential code irc. Enter square footage calculate or enter the square footage of the attic or area to be vented. The best return on investment for protecting the longevity of your home is the proper installation of a balanced ventilation system with the proven performance and quality of lomanco vents.