In this video, you will learn the following:

- How to calculate a balanced attic ventilation system
- How to calculate the NFV (Net Free Ventilation)
- What is the 1:300 Rule?
- How to select the right intake and exhaust ventilation products for your attic
- What are NVA Ratings?
- What is the balanced ventilation rule?
- How to place your intake and exhaust ventilation.

To learn more and to help calculate your ventilation needs, visit gaf.com/ventcalculator