During the winter of 2022-3, the cost-of-living crisis in the UK meant that more-and-more people were struggling to stay warm. Many different groups - from voluntary groups to local councils - started collating different directories of warm spaces. This duplicated work and meant that each directory only contained a subset of all warm spaces. So we developed this as a lower bandwidth tool that searches through multiple warm spaces directories. We have kept it up-to-date each winter since.