I bought this to install myself. It is a “diy” model but when I got to the electrical part of the instructions, I realized it was beyond my diy abilities. The box is open (as I read through the directions) but it is unused and includes all of the parts. The lines are preset, so you DO NOT need an HVAC tech. I am including photos of the electrical portion, so you know what you do need to be able to do.
Here is the Amazon ad if you want more info. It has good reviews, just more than my skillset. https://a.co/d/0dySEtDJ