Richair installed Mitsubishi ductless unit. One air handler, one compressor attached to outside wall. Very punctual, stayed in good communication. Were excellent at thinking through the options for how and where to install the unit for our space. Everything went smoothly and unit is working great. They did excellent work and I would use them again. There was a fair amount of mopping and cleaning to do afterwards to get things back to the way they were before the installation. I'll save a straight 5-star review for the people who leave things as clean as when they arrived. So far that's never happened.