This is only the second year that my shop is heated 24/7...although I only keep it set at 45 degrees ...until I actually walk in the door...Still evaluating the costs however....Last winter the bill was about 160 bucks for the winter...not that bad. in my opinion
Prior to that...the last 25 years or so it was completely unheated until I walked in the door and fired up the Ready heater...smelly noisy Kero type...
BUT I really never had a problem... rust from condensation being the biggest problem..especially on stored band saw blades...
I kept my glue etc inside a wall mounted cabinet that I had installed a single 25 watt light bulb inside ...kept it warm enough so the glue would not freeze...
Bob Griffiths