I am a HVACR service tech of 35 years. I own a post and beam cedar house with 3 zone baseboard heat and a 30,000 Btu ductless split downstairs which cools the whole first floor due to the open layout. I need to install something for the upstairs bedrooms and was thinking about a Unico system. I've read most of the threads here and see very conflicting reports. I also want to do the job myself. I was leaning towards the HiV; I could put the air handler in the small attic space I have, would only have to run one set of lines and on electric line and one drain as opposed to multiple mini splits with multiple lines and electrical runs. Running the duct work would not be to difficult either in the exposed beam area. Any advice? I know United Refrigeration carries these systems. Would they be able to help me in the sizing and the ordering of the right parts?