Hello all, I’m new to the site……and so glad to have came across it! I currently heat my old farm house with wood but i would like to keep the mess outside. I’ve been tossing around the idea of making an outdoor forced air wood furnace. I can’t see dropping over 1500 bucks on a “lil house heater” that I can build myself. I’m pretty good with a welder, but engineer I am not! I have a laundry list of questions that I hope you all can help me with:
1 How thick should my firebox be? I was thinking of a cylindral firebox, if so, will I still need to line the bottom with firebrick?
2 How much space should I leave between my firebox and the outer chamber? How thick should the outer chamber metal be?
3 What type of insulation should I use to cover the outer chamber.
4 Is insulated flex duct hose safe to use for the hot air line running to the huose? I have 3 pieces of 10’’ plastic culvert on hand. I was thinking that I could run the flex duct thru it and bury it underground.
Thanks in advance! Brent