I have been using Spark Heating & Air Conditioning Ltd and highly recommend them! My furnace was breaking down while it was still under warranty. The company sent out two technicians who arrived on time and were very professional and thorough. They handled the warranty work for me and left me quite satisfied. I have known Cleo, the owner, for a long time now. Cleo told me about two years ago that the furnace was going to go out and he was absolutely correct on that. He was most helpful to me so I would keep an eye on it. I have been out golfing with friends and even other contractors feel that Spark Heating & Air Conditioning Ltd see them as being one of the best companies around. I definitely will continue using them.