Sounds like our history is sorta the same Dowa. I got into the trade as a summer job while doing college. Started in small stores, restraunts etc...Then got my big chance at markets and industrial when I got hired at Hussmann San Jose. At the time they were still manufacturing industrial equipment and the Hussmann TD System for the markets. What an eye opener from where I had been working. Got good at the market stuff pretty fast cuz I loved it. Got to work on a fair amount if industrial stuff in the way of wineries, food packaging and frozen storeage. That was really cool, but then Hussmann lost all of their good engineers for that type of work. They all left and went into thier own ventures. Moved to the local Tyler refrigeration rep and really got into the markets. Now at the end on the pendulum swing, I have seen the light that the money is the same in HVAC for a lot less physical effort, but the mental challenges are not the same as refrigeration. Even the big process water and a/c jobs are all packaged equipment. And most of the manufactures, mainly Trane here, are real tight with the liturature that realy helps in the trouble shooting of the equipment. But it is paying the bills quite well, and I don't have to work an average of 60 hours a week anymore.