Baro damper?

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.

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?

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?

right now 20 feet from thimble.
Chimney brand new never burned anything else in it.

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!

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.

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.

same thing no draft on lo fire great draft on high. window makes no difference.

ok the (FREE ) 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.

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.

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.

just noticed montrose pa. i had a place there for a while. about 15 mins from courthouse.

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.

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.

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.