ONTARIO’S LEADING HVAC CONTRACTORDeMark Home Ontario Inc is HRAI certified, customer focused company that provides high quality HVAC products and services to residential customers in Ontario. We are locally owned and operated company who strives to provide customers with the best furnace, air conditioning, hot water heater tankless, heat pump, service in the industry. We offer the highest quality products for rent to own, finance or purchase at the most competitive prices.