Whatever I could find that seemed suitable.You'd salvage a heating element from what? I've already got thermostats that monitor and allow or cut power in the grow. They're great for fans and usually combine with humidity setting also... but they are far from cheap or even affordable for a project like this.
Mom called me back, said the step-brother wanted the shop fridge to replace his older one, with a smaller freezer but he'd be happy to give me the old one. I have no idea what it looks like or how it's setup, age, condition or whatever but it was a working unit so it should be in good enough condition to re-purpose for this job. Yay!
Since the setup is "back on", so to speak... I spent the night re-arranging the shop to accommodate. Any of you've that have seen pics of my shop would know, I didn't have room for another cabinet, much less a cabinet and a fridge. It's amazing how much crap a guy can build up in a shop over a dozen years. I may have a hoarding issue. brownbag would have gone here