Air conditioning contractor. Trusted by more than 1.7 million homeowners, businesses, and builders across Canada to deliver home comfort solutions and peace-of-mind, Reliance Home Comfort is one of Mississauga's largest providers of Air Conditioners, Furnaces, Plumbing, Water Softeners, Water Heaters, Water Filtration and Protection Plans. We offer live telephone support 24/7/365, some of the best guarantees in the business and home comfort solutions for every home and budget.