I have used A1 Heating St. Albert Ltd. about three times now, and they always do a good job for me. They were out here last to change out a circuit board in the furnace, and the time before that to install an air conditioning unit. Their employees are friendly people, and very knowledgeable. I really like how they take the time to explain things to you, and by how they explain things. They do this by using their own personal experiences, and that makes it much more understandable to me.