Barometric Damper

[brenndatomu]

Even in your case where it is working well why would you not want a solution that controlled the draft without dilution air?

Because its causing me no problems...so not wanting to fix what's not broke.

It would allow for lower fluegas temps out of the appliance

How do you figure this...if the firebox is seeing -0.04" WC now, how would we lower temps? And why would I want to? Its already in the high 200's sometimes when on pilot (internal temp, before BD)

 

[bholler]

Because its causing me no problems...so not wanting to fix what's not broke.

How do you figure this...if the firebox is seeing -0.04" WC now, how would we lower temps? And why would I want to? Its already in the high 200's sometimes when on pilot (internal temp)

Never mind it isn't worth my effort

 

[brenndatomu]

Never mind it isn't worth my effort

That's kinda what I was thinking about finding something better than a BD for automatic chimney/draft control on my Kuuma...

 

[bholler]

That's kinda what I was thinking about finding something better than a BD for automatic chimney/draft control on my Kuuma...

For you no it isn't. For people who are having creosote issues because of a bd it absolutely would be worth it. And in return all furnace users would benefit buy being able to have a more efficient solution.

 

[brenndatomu]

For people who are having creosote issues because of a bd it absolutely would be worth it.

We can agree on that...

 

[sadpanda]

And I still stand by my statement based upon what I have seen. Even in your case where it is working well why would you not want a solution that controlled the draft without dilution air? It would allow for lower fluegas temps out of the appliance and would mean no makeup air would be needed for the bd.

Barometric damper is the only solution that constantly adjusts for varying conditions

The statement that nearly every us/can stove is overdrafting is completely off base.

Please explain. There were no takers when I asked for explanation of draft measurement process...

 

[bholler]

Barometric damper is the only solution that constantly adjusts for varying conditions

Yes by introducing dilution air into the smoke stream which in most cases will cause creosote buildup.

Please explain. There were no takers when I asked for explanation of draft measurement process...

I don't know what there is to explain. It simply is not true. Yes if you are talking about a stove in the basement of a 2 story house absolutely it will have to much draft. But many stoves are on the first floor of a single story. They may very well have to little draft.

As far as measuring draft you would have to check with the manufacturer but it can be pretty much anywhere in the stove or connector pipe. And it is typically measured at high operating temp with full air.

 

[Gearhead660]

Your draft has to be off the charts high!
No wonder its so clean...does the chimney do this sometimes?!
View attachment 268743

I checked it this morning and it was -.06. I think I may just add a damper.

 

[sadpanda]

As far as measuring draft you would have to check with the manufacturer but it can be pretty much anywhere in the stove or connector pipe. And it is typically measured at high operating temp with full air.

I'm going to pull this into the other thread as its becoming relevant.

 

[john26]

Barometric damper make work well on a gasifier furnace or something with low emissions. I noticed on kuuma's website it shows a furnace with one installed but if you look close just below where the pipe goes through the wall it looks like a creosote stain?

 

[begreen]

but if you look close just below where the pipe goes through the wall it looks like a creosote stain?

And what looks like leakage around the cleanout door frame?

 

[brenndatomu]

below where the pipe goes through the wall it looks like a creosote stain?

Probably from a previous furnace...many of us weren't smart enough to buy the best right off the bat...

 

[Highbeam]

Barometric damper make work well on a gasifier furnace or something with low emissions. I noticed on kuuma's website it shows a furnace with one installed but if you look close just below where the pipe goes through the wall it looks like a creosote stain?
View attachment 268894

What is a "gasifier" furnace? All wood burners, even a firepit outside are gasification burners. Maybe you meant a furnace designed and tested to have low emissions after it gets up to temperature? Sure, that Kuuma does that but that won't stop condensation in a cold flue. Even perfect combustion releases water and especially before the thing is warmed up there is always a little bit of emissions that can condense on the flue and be washed down from condensing water.

That, or, just a dirty old flue hooked up to a new furnace with what looks like galvanized B-vent but could be stainless steel.

 

[bholler]

Probably from a previous furnace...many of us weren't smart enough to buy the best right off the bat...

They do not all run as cleanly as yours or jrhawks. Yes it is probably due to installation or operator error but that is what we deal with in the field. Most people are not wood geeks like we see here

 

[john26]

What is a "gasifier" furnace? All wood burners, even a firepit outside are gasification burners. Maybe you meant a furnace designed and tested to have low emissions after it gets up to temperature?

I was using the term slang I guess for a hi efficiency wood furnace. Yes all fires burn some sort of gas. I guess it could be an old chimney it could be creosote from the existing high efficiency wood furnace as well.