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Tool Talk Discussion Forum

Help woodstove in workshop will not draw

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chuckinnc

02-15-2007 17:14:14




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I recently installed a wood stove in my workshop, it worked well when it was in my house years ago. It
will not draw & smokes up the shop. The stove has a
6" pipe. The pipe goes thru a metal wall then a elbow & up about 10' at a 45 deg angle (its near the edge of the building & this clears the leantoo roof) I can increase the pipe size to 8" or run the pipe straight, let it come out under the leantoo roof or
what do i need to do to get this sove to draw ?

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Tim B from MA

02-16-2007 12:04:41




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 Re: Help woodstove in workshop will not draw in reply to chuckinnc, 02-15-2007 17:14:14  
The 2' above anything within 10 feet is a good rule. As others have said, it may be that the pipe is cold so it is going to take a while to create a draft after lighting a fire.

If I have not run my wood boiler in a while, often when I open the clean out door of the chimney there is a down draft of cold air into the basement.

I handle this by burning a wad of newspaper in the clean out before lighting the wood in the boiler. Works every time. If you can set up a similar arrangment in the stove pipe, it may fix your problem.

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jeffcat

02-16-2007 09:46:43




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 Re: Help woodstove in workshop will not draw in reply to chuckinnc, 02-15-2007 17:14:14  
Something in "Old's" reply made me remember one of my dad's friends. He had a big farm type house that had been remodeled and was very nice and warm. He got the bright idea to put in a wood stove and heat with it. After the chimney swift nests and such were removed from the flue he installed it. With the windows open a tiny bit everything worked like a charm. When the real cold hit he closed all of the windows and the smell of smoke got worse and worser and real worser. My dad gets a call from him and the both of us run up to see what is the trouble. I finally see what is going on. The house was so tight that the smoke was going up the pipe, out the end of the chimney, and right back in to his roof ridge vent! His upstairs looked like a fog bank of smoke! A small pipe from the window next to the stove to under the stove was all the makeup air you needed. Jeffcatjeff

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chuckinnc

02-16-2007 11:53:18




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 Re: Help woodstove in workshop will not draw in reply to jeffcat, 02-16-2007 09:46:43  
Thanks for the replies, its definetly not a problem with the building being to tight, I think
the problem is with the pipe being just above the
slanted roof line. It needs to be higher, also i dont heat all the time so the pipe/ stove is very
cold when i fire it up. Now i can work on a fix
for it this weekend.



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cj3b_jeep

02-16-2007 07:01:50




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 Re: Help woodstove in workshop will not draw in reply to chuckinnc, 02-15-2007 17:14:14  
Once the fire gets going it will create it's own draw. Sometimes my basement one will have reverse draw due to the upstairs fireplace taking all of the draw. When this happens, I create draw using a shop vac on reverse. I get everything ready to start the fire, then shove the VAC hose up the pipe a few inches and blow air up the pipe for a few minutes (you may have to seal it with a rag) once I get the flow reversed, I start the fire and it just keeps drawing.

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Vern-MI

02-16-2007 06:36:33




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 Re: Help woodstove in workshop will not draw in reply to chuckinnc, 02-15-2007 17:14:14  
Will it draw if you open a door or window? Could be that the garage is built real tight and there isn't any makeup air available.



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jack-iowa

02-16-2007 06:08:14




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 Re: Help woodstove in workshop will not draw in reply to chuckinnc, 02-15-2007 17:14:14  
I vote with cloggged and needs to be cleaned.



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Mattlt

02-16-2007 05:56:27




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 Re: Help woodstove in workshop will not draw in reply to chuckinnc, 02-15-2007 17:14:14  
A vertical pipe is definately better, but here's something to try. Try to get the flue hot before lighting the fire for the day. Burn a couple pieces of paper alone to get things warmed up, then build your fire. A hot flue will draw better.



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big hunter`

02-16-2007 05:23:02




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 Re: Help woodstove in workshop will not draw in reply to chuckinnc, 02-15-2007 17:14:14  
putting a 8" pipe in will only make matters worse



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Wardner

02-15-2007 23:39:56




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 Re: Help woodstove in workshop will not draw in reply to chuckinnc, 02-15-2007 17:14:14  
I have always heated my barn shop with wood and never had a draft problem. My current stove pipe is 4" EMT (about 4.5" actual). The stove outlet is 6" and goes horizontal for 6 feet. I transition to a 4" EMT sweep to go vertical. 40 feet of EMT penetrates the roof and half of it is outside. I like the clearance for safety reasons and to get the smoke away from the house.



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Butch Howe

02-15-2007 20:32:47




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 Re: Help woodstove in workshop will not draw in reply to chuckinnc, 02-15-2007 17:14:14  
I burned wood all my life. In the shop I only use it when I want to do some work in there. Because of this it gets sooted up pretty good so you have to clean it now and then. When it goes out thru the wall on the elbow going up I put a T with a cap on the underside. This way I can pull the cap and clean the pipe out without taking it apart. You have to have a good draft above the roof line. If you run it all winter it will stay pretty clear if you run it hot now and then so as to clean it out and burn out the creasote. Mine in the house is lit for the entire winter. And I sure need it now as it is below zero outside and cozy in here.

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Butch(OH)

02-15-2007 18:11:02




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 Re: Help woodstove in workshop will not draw in reply to chuckinnc, 02-15-2007 17:14:14  
Yup to what Old said plus a steel pipe chimney doesn't draw very well unless you keep a hot fire going. I had a 8" casing for a while and on a cold evening withthe draft shut too far down the dang thing would quit drawing al together.



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Roger in Iowa

02-15-2007 18:05:35




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 Re: Help woodstove in workshop will not draw in reply to chuckinnc, 02-15-2007 17:14:14  
Check to see if birds have built a nest in the upper end, if it has been installed for awhile. Had that trouble with an LP stove. Even had a screen of sorts on the upper end and they still got in.

Roger in Iowa



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Don L C

02-15-2007 18:05:20




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 Re: Help woodstove in workshop will not draw in reply to chuckinnc, 02-15-2007 17:14:14  
.old is....right on.....



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old

02-15-2007 17:38:58




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 Re: Help woodstove in workshop will not draw in reply to chuckinnc, 02-15-2007 17:14:14  
Pipe need to be stright up and also stand a good foot or 2 above the highest part of the roof. The fewer bends it has as in elbows etc the better also



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LLarry

02-15-2007 18:11:15




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 Re: Help woodstove in workshop will not draw in reply to old, 02-15-2007 17:38:58  
Isn't the rule for chimneys that they need to be 2' higher than any part of a roof 10' away?



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Reply

02-16-2007 03:59:10




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 Re: Help woodstove in workshop will not draw in reply to LLarry, 02-15-2007 18:11:15  
Yes , that's correct.



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old

02-15-2007 18:17:50




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 Re: Help woodstove in workshop will not draw in reply to LLarry, 02-15-2007 18:11:15  
Don't know but I know the 2 foot sounds right but the 10 foot away I don't know my stove pipe goes right up and out of the roof but its also a metal roof in my shop so no worries about fire there



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john cub owner

02-15-2007 19:26:05




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 Re: Help woodstove in workshop will not draw in reply to old, 02-15-2007 18:17:50  
the 2 feet above anything within 10 feet is to prevent downdrafts and improve draw.



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LLarry

02-15-2007 18:23:22




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 Re: Help woodstove in workshop will not draw in reply to old, 02-15-2007 18:17:50  
Yeah, It seems a heating guy told me that once. He said just remember 2' above 10' away for draft and such.



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