This app calculates attic ventilation requirements based on your attic space and intake ventilation net free areas. It helps design ventilation systems to meet building code limits, suggesting vent quantities and types for optimal function. It also allows you to check existing systems and plan modifications.
2.0.0
April 19, 2026
Subscription costs
Access to calculator for a month
That was the motivation, glad you like it!
The Roof Ventilator app requires two inputs: Attic Space Net Free Area and Intake Ventilation Net Free Area. You will need to calculate these values yourself before entering them into the application.
Roof Ventilator provides all code requirements per attic space size, the number of exhaust vents or linear footage of ridge vent needed, and whether your current system is within code range. It also details needed changes and amounts of various product types for functional balance.
Yes, Roof Ventilator includes a 'work backwards' section. This feature allows you to enter the current amount of vents and it will notify you if it's within building code range and has sufficient intake net free area.
Yes, all subscriptions for Roof Ventilator come with a 7-day free trial. This allows you to explore the calculator's features before committing to a monthly or annual plan.
Roof Ventilator offers a Monthly Subscription for $8.99 per month and an Annual Subscription for $34.99 per year. Both plans include a 7-day free trial.
Based on the provided data, Roof Ventilator is currently supported on iPhone and iPod devices. Information regarding Android compatibility is not available.
The application was last updated on February 24, 2022, with version 1.0.0. Further update frequency details are not provided in the application data.
Roof Ventilator has an age rating of 4+. This indicates it is suitable for users aged 4 and above.
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