Ventilation Calculator

Use this 3-step ventilation calculator to determine exactly how much ventilation you will need to achieve that perfectly balanced and healthy attic.

Step 1 - Square Footage

Enter Square Footage

Enter the square footage of the attic or enter the dimensions

Enter your square footage:

Enter the dimensions of your attic:

Length (ft.)

Width (ft.)

Step 2 - Ventilation Requirements

Ventilation Requirements

Choose your requirements. Atlas Roofing recommends a balanced ventilation system based on U.S. FHA 1:150 guideline.

1:150 (Recommended)

1:300

Based on your sq.ft. and this guideline, you'll need a minimum of:

Sq. In.

Exhaust NFVA

(Near ridge of the roof)

AND

Sq. In.

Intake NFVA

(On soffits / undereave)

Step 3 - Exhaust Products

Exhaust System Products

Allows excess heat and moisture to exit the home.

The following product options will allow you to achieve an exhaust NFVA of square inches.

Select a product below to continue

TruRidge® Standard Exhaust Vent

linear feet required. Order qty: pieces.

HighPoint® Performance Ridge Exhaust Vent

linear feet required. Order qty: pieces.

TruRidge® ALL-WEATHER Exhaust Vent

linear feet required. Order qty: pieces.

HighPoint® InvisaRidge™ Exhaust Vent

linear feet required. Order qty: pieces.

TruRidge® PRO Exhaust Vent

linear feet required. Order qty: pieces.

HighPoint® AL50 Slant Back Exhaust Vent

Order qty: pieces.

TruRidge® Pro 25 Rolled Exhaust Vent

Order qty: pieces.

HighPoint® GL50 Slant Back Exhaust Vent

Order qty: pieces.

HighPoint® Roof-Mounted Power Vent HT

Order qty: pieces.

HighPoint® Intake

linear feet required. Order qty: pieces.