In an effort to burn less wood. I decided the outdoor bouiler should have its own shed. I figured there had to be lots of wasted heat going up in the atmosphere.
Boy was I right. Gathered up some shedule 40 1.5 inch pipe and welded up a frame, layed r19 over it and covered it with some galvonized tin I had. Ugly? yes. but when you open the door its about a 100 degrees in there. I was fixing the fire every 12 hours, I haven't added any wood since 10PM or so last night.
Darn insulation isn't cheap.
If I can whack 30% off of my wood burning It will pay for itself. Last year I burned around 4.5 cords