iHeatLoss
Utilities
$5.99 · Designed for iPad. Not verified for macOS.
Heatloss helps plumbers, heating engineers, and installers estimate the heat output required for each room in a building.
Calculate fabric and ventilation heat loss using room dimensions, component areas, U-values, internal temperatures, external temperatures, and air-change rates. Each room’s result is shown in both Watts and BTU, helping you choose a radiator with an appropriate heat output.
The app keeps track of every room in the project and provides a running total for the whole building, giving a clear estimate of the overall heat output required from the heating system or boiler.
Features
• Calculate room-by-room heat loss
• Include fabric and ventilation losses
• Track multiple rooms in one building
• View totals in Watts and BTU
• Use room temperature and air-change reference data
• Estimate the total heating output required for the property
Improved performance and updated user interface
The developer, Navtech Software, 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
- Colin Porteous
- Size
- 9.4 MB
- Category
- Utilities
- Compatibility
Requires iOS 17.6 or later.
- iPhone
Requires iOS 17.6 or later. - iPad
Requires iPadOS 17.6 or later. - Mac
Requires macOS 14.6 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.3 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © Navtech Software 2026
