Baro damper?

Re: Baro damper?

PostBy: coalishot On: Thu Oct 23, 2008 9:44 pm

too tall. page back to pics. The thing just wont draft. 8 feet out of chimney 24 feet in all clears roof by at least 10 feet everywhere.
coalishot
 
Stove/Furnace Make: ALASKA
Stove/Furnace Model: LIBERTY

Re: Baro damper?

PostBy: rockwood On: Thu Oct 23, 2008 10:38 pm

Now that I see pictures of the chimney, I think this chimney simply cannot overcome the "stack effect" of the house (pressure differences between the basement and upstairs) when the stove is running low and the chimney is cool. Exterior chimneys often have this problem.

How did this chimney perform with wood stove or whatever was connected to it before? Did it down draft?
rockwood
 
Hot Air Coal Stoker Furnace: Stokermatic coal furnace
Hand Fed Coal Stove: Rockwood Stoveworks Circulator
Baseburners & Antiques: Malleable/Monarch Range
Coal Size/Type: Soft coal: Lump and stoker (slack coal)

Re: Baro damper?

PostBy: coaledsweat On: Thu Oct 23, 2008 11:29 pm

coalishot wrote:too tall. page back to pics. The thing just wont draft. 8 feet out of chimney 24 feet in all clears roof by at least 10 feet everywhere.


Are you saying it is 16' high from the thimble?
coaledsweat
 
Stoker Coal Boiler: Axeman Anderson 260M
Coal Size/Type: Pea


Re: Baro damper?

PostBy: coalishot On: Fri Oct 24, 2008 11:38 am

right now 20 feet from thimble.
Chimney brand new never burned anything else in it.
coalishot
 
Stove/Furnace Make: ALASKA
Stove/Furnace Model: LIBERTY

Re: Baro damper?

PostBy: Dallas On: Fri Oct 24, 2008 12:15 pm

Is your stove getting enough air to burn? In other words, is the house just too tight to get sufficient air infiltration for combustion? If you don't have air infiltration, you won't have draft!
Dallas
 
Hand Fed Coal Stove: Modified Russo C-35
Other Heating: Oil Hot Air
Stove/Furnace Make: Russo
Stove/Furnace Model: Modified C-35

Re: Baro damper?

PostBy: coalishot On: Fri Oct 24, 2008 3:15 pm

No. I even tried it with basement window which is 2 feet from stove wide open. Today it is 55 degrees and stove is off. manometer reads 0 no draft at all.
my chimney simply wont draft. And while it is outside it is insulated with vermiculite top to bottom around 6" liner. It is a pickle. :wtf:
coalishot
 
Stove/Furnace Make: ALASKA
Stove/Furnace Model: LIBERTY

Re: Baro damper?

PostBy: Dallas On: Fri Oct 24, 2008 3:22 pm

It doesn't necessarily have to have a draft with no fire in the stove. The fire is part of the reason the draft is created. In addition, the inside/outside temperature differences will effect it.

It sounds like you are looking for a "phantom draft". Wait till you get a fire in the stove, check the draft. If it 's poor open the window for 20 minutes and see what happens.
Dallas
 
Hand Fed Coal Stove: Modified Russo C-35
Other Heating: Oil Hot Air
Stove/Furnace Make: Russo
Stove/Furnace Model: Modified C-35

Re: Baro damper?

PostBy: coalishot On: Fri Oct 24, 2008 6:22 pm

same thing no draft on lo fire great draft on high. window makes no difference.
coalishot
 
Stove/Furnace Make: ALASKA
Stove/Furnace Model: LIBERTY

Re: Baro damper?

PostBy: coalishot On: Fri Oct 24, 2008 6:24 pm

ok the (FREE :D) draft inducer arrived and is installed. I set it up to draft .06 with no fire. Will light tonight. Pics and results to follow. Will also calculate cost of running inducer and post.
coalishot
 
Stove/Furnace Make: ALASKA
Stove/Furnace Model: LIBERTY

Re: Baro damper?

PostBy: cArNaGe On: Fri Oct 24, 2008 6:43 pm

A little hijack here.

My chimney is 45 feet high or will be when rebuilt. What size baro for it? Its an 8.5 x 8.5 flue. The chart at field controls says chimney's that are very tall require bigger baro's but it also doesn't show what size I need.
cArNaGe
 

Re: Baro damper?

PostBy: coalishot On: Fri Oct 24, 2008 6:57 pm

loaded question all depends on draft and size of stove going in. I would say 6" for 6" pipe off stove and 8" for 8" pipe off stove. Good place to start a 6" baro wide open cuts down a whole lot of draft.
Stove manufactuer should give u recommendation.
coalishot
 
Stove/Furnace Make: ALASKA
Stove/Furnace Model: LIBERTY

Re: Baro damper?

PostBy: coalishot On: Fri Oct 24, 2008 6:58 pm

just noticed montrose pa. i had a place there for a while. about 15 mins from courthouse.
coalishot
 
Stove/Furnace Make: ALASKA
Stove/Furnace Model: LIBERTY

Re: Baro damper?

PostBy: cArNaGe On: Fri Oct 24, 2008 7:37 pm

coalishot wrote:loaded question all depends on draft and size of stove going in. I would say 6" for 6" pipe off stove and 8" for 8" pipe off stove. Good place to start a 6" baro wide open cuts down a whole lot of draft.
Stove manufactuer should give u recommendation.


Boiler is 8" Thimble will be 8" Flue will be 8" figured 8" or 9" baro.
cArNaGe
 

Re: Baro damper?

PostBy: coalishot On: Fri Oct 24, 2008 8:31 pm

8" is fine. I always go with the full diameter of the pipe , unless u get into low mass / oil furnaces , oil boilers with draft inducers. be hard to get anything else on there bugger unless u use a reducing t with a 9" on the bull which i have never seen.
coalishot
 
Stove/Furnace Make: ALASKA
Stove/Furnace Model: LIBERTY

Re: Baro damper?

PostBy: coalishot On: Fri Oct 24, 2008 10:00 pm

ok fired stove up 41 degrees outside. have it running on 2 1/2 which I could never do before drafting .09 over fire. Looks like all problems are solved. Will adjust baro a little when cold weather gets here in a month or so. For now I'll over draft a little. I dont think over drafting a stoker is a real concern for coal use as u only feed so much coal at a time. Plus Alaska list .04 as a minimum draft requirement not a max. Will post pics asap. must say draft inducer does disturb the look. But aesthetics vs not waking up again hum tough one.
coalishot
 
Stove/Furnace Make: ALASKA
Stove/Furnace Model: LIBERTY