Cardboard to burn out creosote? OWB

  • Active since 1995, Hearth.com is THE place on the internet for free information and advice about wood stoves, pellet stoves and other energy saving equipment.

    We strive to provide opinions, articles, discussions and history related to Hearth Products and in a more general sense, energy issues.

    We promote the EFFICIENT, RESPONSIBLE, CLEAN and SAFE use of all fuels, whether renewable or fossil.
Status
Not open for further replies.

warno

Minister of Fire
Jan 3, 2015
1,237
illinois
We all know the OWB's make enough creosote to sell the stuff. But what's the best way to burn it out of the firebox? I have heard cardboard will burn really hot really fast to burn it out. But I'm a little concerned about this, so I thought I'd ask. I have been trying to let the water temps run down a bit and letting it burn flat out for add along as the aquastat will allow. It does ok but, Is there any other way to burn it out safely?
 
Burning that hot flat out with cardboard makes me a little uneasy. Few scoops of Rutland creosote remover works for me.,
 
I think I would just let it go. It should reach a point that it burns a bit off now & again. My firebox has a steady coating of creosote on it, doesn't get any thicker. Seems to get to a certoin point, then the top layer keeps flaking off. Don't think it's a very thick layer at all.

Don't know how much you're talking about though. A hot cardboard fire would likely burn it off - but it would be a very smokey hot affair. And not the good kind of smokey hot...
 
Well I'm glad I asked about it before just going with what I read online and doing it.
warno, post a picture of the accumulation please also let us know what you did about your situation please. i am with maple1
 
I haven't done anything about it yet but I'll try to remember to get a pic when I put in the night load. I have been trying to let it burn down a little more then let it burn hot to catch up on temp. The coating inside gets crusty and flakes off but I was just wondering if there's anyway to really get it cooking.
 
So I got some pics but they aren't that great because I wasn't going to stick my hands in the firebox with a toasty bed of coals roasting away in there.

So here's the pics

Top and back

20160106_145140_zpskxa1s3gw.jpg

20160106_145149_zpshnnpp556.jpg

Side wall. Sorry about the smoke in the way but you can see the coating I have.

20160106_145213_zps5903ocqd.jpg
 
Hard to tell from the pics, but I don't think that looks a whole lot different than mine.

You could try the cardboard thing, I don't think you'd hurt much. Especially if you do it in a cool boiler that had more room to absorb heat. The biggest risk I would anticipate is having someone call the fire department on you when they see all the smoke.
 
I didn't try the cardboard but I have been letting the boiler cool down about 20-30 degrees when I do my weekly cleaning, then fire it up and let run full on to dry up the creosote in the fire box some what. I can scrap most of it off with my coal rake after that.

I'm wondering though, next year when I start batch burning to heat storage will it dry up the creosote that I'm building this year?
 
This is the top and baffle in my fire box

20160131_063546_zpsluungyid.jpg

Here's one of my sides

20160131_063553_zps9xpazu9a.jpg

Another of the baffle

20160131_063605_zpspfab61wy.jpg

This is the HX

20160131_064217_zpsy5jnz3ph.jpg

20160131_064720_zpslixu3f55.jpg


This is after a cleaning in the heat exchanger

20160131_064522_zpsb7vf3tla.jpg

20160131_065130_zps3jijseve.jpg


Could I expect less creosote when I start batch burning next year?
 
This thread reminds me of a few years ago when I burned cardboard in my old stove out back to show people what happens in the pipe.

brownie flaming.jpg
 
  • Like
Reactions: heavy hammer
  1. Bart - My masonry chimney looked like that more than once from the Harman in the basement. Cracked the top 2 ft once. Kind of like an 8 inch diameter road flare. Smelled like one too.
 
Status
Not open for further replies.