Trusted home comfort services in St. Catharines and the Niagara Region for over 35 years. Working with Mr. Furnace for your furnace, air conditioning and air quality systems means you will enjoy personalized customer service and the expertise of our team to ensure comfort for everyone in your home. Whether you need a new heating and air conditioning system, indoor air quality components or a water heater, or simply help maintaining or repairing your existing systems, our home comfort advisors, technicians and installers are all here to help. We put our knowledge and experience to work to help you select the most suitable solutions for your home and for your needs.