We went to Design Air on the recommendation of a neighbour. We live in a old brick loft with some interesting and unique spaces and challenges.
After numerous other companies either just ghosted us after the first visit or could not find a simple way to deal with replacing our furnace and A/C these guys came in and were not fussed in any way by the job. It was like they'd seen it all and nothing phased them. They quoted quickly and fairly and were very responsive. Their installation team was the nicest group of service providers I have ever had in my house. Very old school customer service. The did everything they said they would do, on time and as -quoted, required zero micromanagement and left no trace. other than a brand new furnace and AC that is working just fine.