Enter square footage calculate or enter the square footage of the attic or area to be vented.
Lomanco roof vent calculator.
Vent calculator design your balanced ventilation system.
Use the calculator below to find out how many exhaust and intake vents you will need on your house.
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.
For balanced ventilation an equal amount of intake vent area net free area should also be installed.
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.
Use avp s roof vent calculator to determine the number and size of exhaust vents you will need.
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.