A lot of good responses. Stay in as long as you can. When you get out try to get into a full time guard or reserve position. Lastly, there are tons of hvac guys out there, some good, some bad. This industry could use more mechanical engineers than technicians. Go to school, use your brain not your body. Wake tech has a mechanical engineering program. Look into north Carolina's 2 + 2 program. you do 2 years at a community college, and 2 more years online thru the nc public college system.