re: heaters

My shop is in an old office building that we have been working on for about 3 years.
The outside walls are 14" thick brick, block & concrete, therefore the inside temp stays a lot more constant.
The shop has a central heat/AC unit but I don’t use it.
I like the wood heater. I place 5 gal buckets near each tool for scraps for kindling. The city has chip sites around town that people take trees & limbs to & pick up mulch for the garden. The one that I frequent is only 2 miles from my shop.
Sometimes I find some good hardwood that I can saw into blocks & lumber.