Energy efficiency in an apartment building in Canada

In 1995, a non-profit cooperative began a retrofit project of a 15-story, 112-unit high-rise apartment building located in Toronto, Canada. The retrofit was required to bring the 30-year-old building and its components up to the requirements of the Ontario Ministry of Housing and the Fire Marshal's Act of Ontario. Some of the changes were designed to improve energy efficiency; others were undertaken for independent reasons such as the rehabilitation of the building envelope, which were also expected to affect energy efficiency.