This has been covered here and there in the past but was hoping for some updated info. I'm looking to heat the shop with a wood stove. I can get as much wood as I want, my costs would be to procure an old stove and clean it up, then install. Is this an efficient way to go? In my neck of the woods, winter at worst is only down in the high teens low 20's during the day so i'm thinking it should be sufficient for a work space. The shop is 20x40.