HVAC contractor. If you are in the market for a new furnace, Atlantis HVAC Systems would be happy to offer a free no obligation estimate on the high efficiency system that's right for your home - taking into account your needs, your home's design and the best value. Servicing Oakville, Mississauga, Etobicoke, and Burlington, the Atlantis service department will find a new solution or repair your heating and air conditioning system to get it running as efficiently as possible. Call 905-845-4009 today to learn more!