It was easy and it works well! Super quiet and smooth! I thought the circuit boards could be of better quality, but that's pretty normal electronics quality these days that I learned from my electrician from all suppliers. The biggest negative thing I learned after I installed is: It doesn't matter if you have a certified electrician wire it. You cannot do the rest of it yourself and the whatever or 5 year warranty that's available. It has to be done start to finish by an HVAC contractor and lots of technical information has to be logged and supplied. Shame because I could sell and install tons of these units. Anyways... read more