Nobody mentioned the most important one: Will you provide a written Contract?
What is your contracting (not business) icense number? Having and active State license answers many other questions, like ... read more
There are severl things to consider first: 1) Was the proper double-paned, Low-E windows made for such a location installed? 2) Is the room properly insulated? 3) Does the existing HVAC unit have the ... read more