Outdoor Wood Furnace Info
Outdoor Furnaces - Manufacturers with NON EPA-Certified Models Only => Home Made => Topic started by: ls61 on December 22, 2011, 08:13:28 AM
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a buddy and i started a new owb build, we are going to build two like this, this is pics of the the firebox adding ash tray and grate that will have water circulation
http://s762.photobucket.com/albums/xx270/lshirer61/Shirer%20OWB%20Project/# (http://s762.photobucket.com/albums/xx270/lshirer61/Shirer%20OWB%20Project/#)!cpZZ1QQtppZZ16
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Good start, keep us posted
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Don' t forget to paint " EPA Certain Phase II"
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got some good componets to work with,in the photo's is the sq tube the water pipes or are you building a gassifier.
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Thanks for sharing the photos. Good luck with the rest of it.
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Looks like you have a good start. Firebox looks to be huge, room to put a lot of wood!! Keep us posted of progress.
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the tubes are the grates, the firebox is 44 inches long and about 31" dia., the water jacket is a 48" fuel drum, it will have an exhaust system like the PandM which we will fabricate next week when we have time
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Why are circulating water in the grate?
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we belive that if we ciculate water in the grate which will be the return water, you will get a longer lasting grate and not having to replace so soon and use all the heat from the firebox you can
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I just did this project I used half of a 36" 500 gallon propane tank for my inner and a 48" 500g fuel barrel,fired it up tuesday and works like a champ. Good luck and alot of happy welding.
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I just did this project I used half of a 36" 500 gallon propane tank for my inner and a 48" 500g fuel barrel,fired it up tuesday and works like a champ. Good luck and alot of happy welding.
Did you build yours like the P and M as well? I'm planning on building one like that next fall. Looking forward to hearing how well it works out for you.
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countryguy you got any pics
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This stuff gets HEAVY fast!
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HERE IT IS!!!!!!! Drawings for this project.
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Top view
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Side view. Sorry had to drop resolution to make it fit.
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Close up of the turn around.
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as you can tell the smart one joins and post, i am just the fabricator and welder
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Sorry Is61 I got in hurry and wasn't going to track down the wifes camera every night. I planned on taking pics.If you have any ? feel free to ask though I haven't lost the pics in my mind yet!
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Looks like a good plan.
I like the P&M extractor like you have copied into your design.Make sure it is easily accessed,as you will get a build up of ash in it I imagine.Which you will need to rake out every so often.
Yeah it doesn't take long till you have a behemoth of steel all welded together.
Oh and welcome to the site you guys!
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as you can tell the smart one joins and post, i am just the fabricator and welder
Well from my experiance the engineers can draw all the pictures they want,but I still have to build and make thier pipe dreams work!
The engineers anymore just tell me what they want to do ,and leave it all up to me.Works out better in the long run as they can never plan for all the unforseen problems.
You guys have an awesome start.Having cad drawings to work off of is nice.I had to make my own prints for my build,but they just turned into guidelines as I changed stuff on the fly all the time.
Now post pics for us to see! :thumbup:
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Like the drawings,great design. I like the P&M design to. If ihad it to do all over again i would buy there OWB instead of the one i bought. But that is 20/20 hind sight. Like the idea of water through grate to, get all the heat you can out of wood. Keep us posted on progress.
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So we are getting ready to go look for some steel for the heat extractor. We noticed P and M use 1/4 steel for it. How do you guys think 3/16 would hold up for this part? We already have a few scrap pieces of it and it would not be directly in the fire box. Any suggestions?
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ash pan and grate
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From the other end
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A friend of mine built an OWB a few years back with a water grate. His boiler design was square as opposed to round like yours. His grate was, I believe, 18" wide and 4' long. He wisely incorporated a means to shut off and by-pass the grates altogether in the event that he couldn't hold a fire. The only way that he could make it work well for himself was to remove his ash pan altogether and allow that area to fill up with ashes so that the cool pipes wouldn't extinguish the fire. He had to keep the ash level "just so" all the time. He eventually bypassed the water grates so that he could go back to using his ash pan. I spoke to him this past weekend and he said that if he did it again,he would just run two lines with water in them(in a "U" shape) as opposed to all six. He figured that would create a few ridges for coals to sit on.
Your project looks great! Keep the pics coming.
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anyone on the idea of 3/16 or 1/4 for the exhaust chimney
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anyone on the idea of 3/16 or 1/4 for the exhaust chimney
mine is schedule 40, 8 inch pipe
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3/16 should be plenty thick enough. Easily replaced should it ever wear out. Mine is the store bought insulated S.S. Works OK but expensive.
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Good info about grates, Martyinmi :thumbup:
3/16 should be ok especially if you already have some. will probably get more heat transfere from 3/16 verses 1/4 to.
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New pics!
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More pics
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Looks great so far. Also, it looks like you have the same shop cleaner/organizer that I have :thumbup: On second thought, yours is very neat compared to mine!
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Anymore pics?