Ventilation Calculator
Ventilation Calculator
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.
Square Footage
Calculate or enter the Square Footage of the Attic or Area to be Vented
Ventilation Requirements
Choose your requirements. Owens Corning recommends a balanced ventilation system based on the U.S. FHA 1/150 guideline. Learn More
Exhaust System
Allow excess heat and moisture to exit the home.
Select your preferred type of exhaust system:
Based on your 1100 sq. ft. and the 1:150 guideline, you'll need a minimum of:
528 sq. in.
Exhaust NFVA(Near ridge of the roof)528 sq. in.
Intake NFVA(On soffits / undereave)Choose Exhaust System Product
Choose ONE of the following products to meet the recommended exhaust NFVA of 528 square inches:
4-Foot Strip Heat & Moisture Ridge Vent
Amount Required: 27 lineal feet
Order Qty: 7 pieces
Product Details
4-Foot Strip Heat & Moisture Ridge Vent with Weather PROtector® Moisture Barrier
Amount Required: 30 lineal feet
Order Qty: 8 pieces
Product Details
Choose Intake System Product
Choose ONE of the following products to meet the recommended intake NFVA of 528 square inches:
Soffit Vent
Amount Required: 218-829 pieces
Order Qty: 829 2" pieces | 389 3" pieces | 218 4" pieces
*These products are not offered by Owens Corning.
Undereave Intake Vent
Amount Required: 14-33 pieces
Order Qty: 33 4x16" pieces | 20 6.16" pieces | 14 8x16" pieces
*These products are not offered by Owens Corning.
Next Steps
Next Steps
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