Why have my heat losses changed since the last time I opened the project?

To ensure accuracy, we regularly update our heat loss calculations in line with the latest regulatory guidance and to fix minor software bugs.

Read our recent news and updates to stay up to date with changes.

Autumn 2026: we are updating the default temperatures of heated and unheated spaces in line with new guidance. These updates will automatically be applied to heat loss calculations on new projects. On pre-existing projects, you will have the option to accept the new heat loss calculations, or to view the existing project as it was without making any further changes to the floor plan.