A while ago I posted asking for recommendations for this kind of work. Here are the recommendations I received: Tedesco on Wellesley Sullivan Max C. Smith Company (2 recommendations) Ciaran Wolfe of Wolfe Heating and Air Conditioning. 412 761 9536 Caruso HVAC - 412-292-0803 Restano Heating, Plumbing, & Electric Dongilli (Anthony) at 412-653-0532