Cotati based Smart 72 came and did a whole overhaul. Removed an old freon based minisplit and a Samsung home heating central dual intake system in a day, placed 5 new heaters all in a few days while I was at work. Set up a phone control system to get these working from both the thermostat and the app to have them set to temps based on where the thermostat is for each separate unit. Really had it set up in a weeks work and done. I still need to drywall the old central heat cents and restart the main thermostat to be able to manually control it so update to come but all so far is 5 star. read more