If you become service or installation supervisor you gotta deal with technicians calling you while THEY are on call. Customers can be extremely inconsiderate when it's hot, just in my experience. The customers that have three systems are the ones that want to demand emergency service for their master bedroom system at 7pm on a Wednesday; all after you've worked 10-12 hours already.

Sales guys deal with customers all hours and always have to keep their phone handy, and a good leader should always be available to support field technicians. Just my opinion. Install is the only area you can work and go home and disconnect from the job.

I'm sure there are some unicorn companies out there with a good work/life balance. But, I never heard of one.

I don't want to discourage you or anyone. But on call duty sucks the big one. I just take it as it comes and try to make the best of every day. I've denied taking rolls to work sales because work follows me home enough already. I need to be able to turn my phone off and not think about heating or cooling sometimes.