Triton College is another good school for hvac, They have good instructors and a great lab.
Originally posted by rimek
There are community colleges and commercial trade schools such as Coyne and ETI that have nightime class hours-and offer placement assistance upon graduation to the top students(if not all). Are you close to Northwest Tech/IUPUI in Gary area? Why not do that while you've still got a job. Your experience with computers may make you a possible candidate for controls work, which usually has openings.
Trade school training will usually get you above minimum $$ pay at entry.