How physically demanding is HVAC repair?

Home repair would be fairly easy, not even the units are that big if you would have to install them. It's if you have to do commercial installations that the problem would come in. Repair of them usually isn't too bad and installations are usually with more than one guy so that would be helpful. So for the most part they could be fairly easy but it's that once in a while that they may want to be able to count on you as well that may be the problem. Hope you get some better answers from some in the field but if you don't try contacting a local dealer in that to see if they would give you five minutes of their time to talk with you. Someone who is seeing one ready to get into something because they want to work would be a plus, plus they may even have some suggestions about what may be a better fit for you. Like in sales or parts work. It may not be what you want but it may be a better fit.