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Attic ventilation calculator.
The home ventilating institute hvi recommends that powered attic ventilators provide at least 10 air changes per hour to equalize attic temperature.
Roof ventilation calculator enter your attic area or length and width to determine your ventilation needs.
Save this simple excel file to your computer and use it any time.
Width or area.
To calculate the amount of ventilation you need for your home visit gaf s ventilation calculator now.
Our passive roof vents are ul certified and rated to withstand wind pressure in excess of 200 mph.
Effective attic ventilation requires air to exit at or near the peak of the roof and replacement air to be drawn in under the eaves of the house via soffit venting.
Gaf ventilation calculator proper attic ventilation can help reduce the load on your air conditioner.
You can personalize the calculator for your customer and include your contact information.
With this tool you can quickly and easily estimate your ventilation needs.