Heating & Air Conditioning in Lake, Ontario

"Needed a new furnace (after 35 years!), they installed it. Good work, cleaned up everything, works fine. Had to..."

"DeMark Home Ontario did a great job with our new tankless water heater. Mike was super quick in responding to my..."

"Quality work, fair pricing, great ideas and solutions to make things work. Everything was left clean and tidy. I..."

"They were very efficient and did a great job at cleaning all my vents. They also made sure that no dust or debris..."

"Installation was a breeze. The 3 gentlemens Joe/David and John were courteous, polite, professionals and most..."

"You are a 1st class company. From speaking to Charolette to To all the employees who come to my home .it is a..."

"Jerry and team did a good job installing the furnace and Ac. Also, Joe has been very accomodating and prompt..."

"Kevin was great and came over and installed a gas line for my new BBQ and shut off the gas to an old and not working..."

"I upgraded my ac unit to heat pump. Alex did a great job installing high efficiency unit. I'm very happy to work with..."

"Great service, responsiveness and communication. Hadi and team are fantastic and easy to work with. "