Cool Tech Mechanical has been extremely reliable and always very satisfying, in the past, so we did, of course, call them again, just recently, to have our furnace repaired. As always, they were easy to contact and quick to arrive. The technician who came over was polite and very efficient, and got the furnace working perfectly, again. They're a professional and well organized company, and we've always received excellent service from them, so would absolutely recommend them to others.