Using 4DFlo to design your building
This online design tool is a dynamic modelling software written by Breathing Buildings. It is free to use because we want to help with the provision of better buildings.
The software has been developed to assess whether a particular design is compliant with the summertime overheating criteria, as laid out in Building Bulletin 101 (BB101).
BB101 was revised in 2017 and the dynamic thermal modelling software 4DFlo is designed to assess the performance of your building against the summertime overheating criteria described in this document.