I have been doing business with Wolverine Heating & Cooling for the last 40 to 50 years, and they have always treated me right. They just put in a new furnace last week, and tomorrow, they are going to install another one for me. I like them! They are very polite. and they do their work in an efficient and business-like manner. Then, they clean up everything when they finish. They are very professional people. What more could you ask? I highly recommend them!