GB Gas Ventilation Calculator
BS5440 Calculator
$3.99 · Designed for iPad. Not verified for macOS.
Calculate permanent ventilation quickly and accurately for Natural Gas and LPG appliances. Includes multi-appliance calculations, vent sizing and printable reports.
A Gas Ventilation calculator for working out ventilation requirements for gas appliances. Open flued, Room sealed, Flueless appliances.
This gives you the option of working out ventilation when more than one appliance is fitted in a room.
For existing and new ventilators you can calculate the free air area of the vent to work out if its suitable for the appliance(s) it is feeding.
No more formulas and calculations to remember, read the heat input from the appliance data badge and press calculate.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Updates to the user interface, ventilation requirements have not changed.
The developer, GB-GAS.CO.UK, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- George A Brown
- Size
- 3.4 MB
- Category
- Business
- Compatibility
Requires iOS 26.0 or later.
- iPhone
Requires iOS 26.0 or later. - iPad
Requires iPadOS 26.0 or later. - Mac
Requires macOS 26.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 26.0 or later.
- iPhone
- Age Rating
4+
- 4+
- Copyright
- © gb-gas.co.uk
