Marathon HVAC Services, LLC. was recommended by a contractor for a remodel. They replaced old ducting, relocated the furnace and coil, and installed new air vents. A big job and definitely not an easy one, but they were thorough. They are transparent and honest with what work needs to be done. Their quote was reasonable for the quality of work. Two years later my AC unit stopped cooling, they came out and repaired a plumbing issue that was caused by a contractor, and my AC was up and running again. They wore shoe covers and made sure the areas they worked on were clean before they left. I really appreciated that. I would highly recommend them for big or small jobs.