My 2.5 story house dates from 1920 or so and has steam heat with radiators. The lack of existing duct work presented a real challenge for Hughes Mechanical, but they totally rose to the occasion. My initial consultant, Brad, did not appear fazed by the job at all and immediately suggested a high-velocity system for the top two floors, a conventional system for the first floor, and a mini-split for the one room off the back of the house built on a cement slab and thus unreachable by the other two systems. The crew that came in, Billy, Eddie, Matt, Brian and others, was totally professional, did exactly what they said they would do, cleaned up after themselves, accommodated my schedule, and were a pleasure to have around for a couple of weeks. This was the only company from which I obtained an estimate that suggested anything other than a conventional system, which would have involved boxing in ducts all over the place. There is only one small place where Hughes was forced to put a duct outside the walls. As a bonus, Hughes gave me two new thermostats to control both the heat and air. I am super pleased with my air conditioning job!