If there were 6 stars, I'd select all 6. Dave was called in to fix a mess with oil heat and we ended up getting twice the conditioned space for about 1/2 the price we were paying before. Along the way, he installed gizmos that allowed me to breathe normally and get off 3 allergy medications. His work is impeccable and without comparison. Ask him what PEQS stands for...he lives up to the name!