Blazeking Princess smoke issue- once even while hot to seal joints or not to seal

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krysium

New Member
Feb 14, 2025
1
IL
I have had an enviro kodiak insert on main floor that has run nov-march flawlessly for 5 years.
I season my own cherry, oak and walnut, about 25 face cord at a time.

Last year I paid for a BK princess install in my walkout basement W fresh air kit.
Our home is spray foam insulated and fairly airtight.
Home is a cape cod so effectively a 3 story chimney 30 ft +

I smoked the hous on first fire bc the enviro has a draft with a single piece of burned paper or torch. The BK requires an entire newspaper or two.
Then I learned you cant make fast adjustments on this, you put it on high, walk away, come back kick off the cat then reload.

I learned, and the stove ran fine for 3 weeks. Last week we had a light freezing drizzle, 30s-low 40s. Fireplace had been running mid range on the cat thermometer for hours, it had an active flame. I switch it off cat to add more wood before leaving for a bit and smoke starts coming out of the 2 foot horizontal black pipe right before it goes out the wall in the double wall stainless.

Stove pipe at 10 inches is warm to touch but NOT hot at normal running. I put a stove pipe thermomenter on it, runs about 170-190 on high, lukewarm to touch in mornings.

I inspected the outside chimney via the cleanout T- fine.
I took off the back cover and inspected the fresh air intake, appears fine a bit of corrosion in spots on a brand new fireplace.


1. what is the stove pipe temp at 10 inches off the stove supposed to be to maintain draw, certainly im not anywhere near the 212 I see online for typical stoves
2. will sealing the black pipe joints help?

right now the stove is a cold air brick, I had to block off the chimney and cold air intake...I cannot run it if it smokes due to wifes asthma. Enfio has been a dream, this is a nightmare.
 
Share some pics of pipe setup?

You say 30' of chimney. That should be overkill for draft making. 2' of horizontal stove pipe is a hurt but, the 30' of chimney should make up for it. Screen on your chimney cap?

You mentioned Oak. Typically takes 3 years to properly season. Wondering if your cap may have some build up?
 
Draft reversal can happen when running the flue so cold.
Is the stove pipe double or single wall?
 
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Are you running your other stove at the same time? How close are the two chimneys to each other? If your house is really tight you may be losing draft due to the negative pressure from running both stoves
 
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Do you think that would make much difference with only 2' of pipe?

It's the hottest point of the flue, so the heat loss is largest per length of pipe (because the temperature gradient from inside to outside is largest).

Moreover double wall flue seals better than (some) single wall flue.
 
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