Chimney replacement

Chimney replacement

PostBy: John518 On: Sat Jan 18, 2014 8:30 am

Right now I have a pellet stove running.
I want to replace it with an Alaska Kodiak coal stove.
The pellet stove was installed by the store to code.
The store that I might be buying from is telling me that I will need a 15 foot chimney.
If the chimney I have now works why can I not just replace it with the correct diameter class a pipe?
Why does is have to be 15 feet in length?
John518
 
Hot Air Coal Stoker Stove: Alaska Liberty
Coal Size/Type: Rice

Re: Chimney replacement

PostBy: freetown fred On: Sat Jan 18, 2014 8:40 am

Welcome J, can't really tell anything without pix of what you've got. It just needs to be a min. of 2' above any roof peaks within 10'
freetown fred
 
Hand Fed Coal Stove: HITZER 50-93
Coal Size/Type: BLASCHAK Nut/Stove mix

Re: Chimney replacement

PostBy: lsayre On: Sat Jan 18, 2014 8:42 am

Coal stoves have much lower overall stack temperatures than wood or pellet stoves, so the draft is reduced due to the lower stack temps.
lsayre
 
Stoker Coal Boiler: AHS S130 Coal Gun
Coal Size/Type: Stockton Anthracite Pea
Other Heating: Resistance Boiler (13 KW)


Re: Chimney replacement

PostBy: John518 On: Sat Jan 18, 2014 8:53 am

2' above the peak and 3 feet away from the peak
Right now I have a chimney that is +/- 3" diam class A
I want to replace it with +/- 5" diam class A.
My question is why the 15' size.
John518
 
Hot Air Coal Stoker Stove: Alaska Liberty
Coal Size/Type: Rice

Re: Chimney replacement

PostBy: freetown fred On: Sat Jan 18, 2014 8:54 am

I don't know about pellet chimneys, but my guess is that the proper install for any, wood, coal, corn, whatever, chimney, still require the same clearance from roof peaks
freetown fred
 
Hand Fed Coal Stove: HITZER 50-93
Coal Size/Type: BLASCHAK Nut/Stove mix

Re: Chimney replacement

PostBy: freetown fred On: Sat Jan 18, 2014 8:55 am

AND--I've answered that twice for you:)
freetown fred
 
Hand Fed Coal Stove: HITZER 50-93
Coal Size/Type: BLASCHAK Nut/Stove mix

Re: Chimney replacement

PostBy: freetown fred On: Sat Jan 18, 2014 8:57 am

PS--does the Kodiak use a 5" pipe??? Not 6"??? PS----if you're above your peaks w/ your existing pipe--you will be good just replacing with the proper diameter pipe--How tall is existing chimney? John, I hope you're not one of them thar thin skinned guys--my social skills aren't always up to expectations but I do like getting right to the point :clap: toothy
freetown fred
 
Hand Fed Coal Stove: HITZER 50-93
Coal Size/Type: BLASCHAK Nut/Stove mix

Re: Chimney replacement

PostBy: titleist1 On: Sat Jan 18, 2014 9:13 am

Welcome to the forum J....
Is your pellet stove power vented?
I am 99.99% sure the Kodiak is a 6" flue.
titleist1
 
Hot Air Coal Stoker Stove: Harman Mag Stoker (old style) one in basement, one in workshop
Hand Fed Coal Stove: Harman Mark III on standby for long power outages
Coal Size/Type: Rice/Anthracite; Nut/Anthracite

Re: Chimney replacement

PostBy: oliver power On: Sat Jan 18, 2014 9:23 am

15' feet is the min recommended height for good draw. Then there's the 10 / 3 / 2 rule. Where the chimney needs to be 2 feet higher than any peak within a 10 foot diameter of the chimney. So now you have minimum Recommended height, and the 10-3-2 Rule. They are both guide lines towards a good chimney draw. With coal gasses not as hot as wood gasses, you'd want to shoot for 15'. The chimney height starts at the smoke outlet of the stove. I have a neighbor who has burnt wood for years. There chimney is only about 8 feet tall (trailer). A few years back, they tried coal, and hated it. Even with my coaching, they couldn't keep the fire going around the clock. (Being life time wood burner's didn't help any). From the start, I wondered if the short chimney was going to be enough for coal. Whether it was them, the chimney, or both, we'll never know. They sold the coal stove, and went back to burning wood. The hotter wood gasses created better draw in there short chimney.
oliver power
 
Stoker Coal Boiler: KEYSTOKER Kaa-2
Hand Fed Coal Stove: Hitzer 50-93 & 30-95, Vigilant (pre-Vigilant-II)
Baseburners & Antiques: MANY (Mostly when burning wood)
Stove/Furnace Make: HITZER / KEYSTOKER
Stove/Furnace Model: 50-93 & 30-95 , Kaa-2

Re: Chimney replacement

PostBy: oliver power On: Sat Jan 18, 2014 10:13 am

titleist1 wrote:Welcome to the forum J....
Is your pellet stove power vented?
I am 99.99% sure the Kodiak is a 6" flue.
Yes, 6" flue (smoke outlet)
oliver power
 
Stoker Coal Boiler: KEYSTOKER Kaa-2
Hand Fed Coal Stove: Hitzer 50-93 & 30-95, Vigilant (pre-Vigilant-II)
Baseburners & Antiques: MANY (Mostly when burning wood)
Stove/Furnace Make: HITZER / KEYSTOKER
Stove/Furnace Model: 50-93 & 30-95 , Kaa-2

Re: Chimney replacement

PostBy: Berlin On: Sat Jan 18, 2014 10:20 am

oliver power wrote:15' feet is the min recommended height for good draw. Then there's the 10 / 3 / 2 rule. Where the chimney needs to be 2 feet higher than any peak within a 10 foot diameter of the chimney. So now you have minimum Recommended height, and the 10-3-2 Rule. They are both guide lines towards a good chimney draw. With coal gasses not as hot as wood gasses, you'd want to shoot for 15'. The chimney height starts at the smoke outlet of the stove. I have a neighbor who has burnt wood for years. There chimney is only about 8 feet tall (trailer). A few years back, they tried coal, and hated it. Even with my coaching, they couldn't keep the fire going around the clock. (Being life time wood burner's didn't help any). From the start, I wondered if the short chimney was going to be enough for coal. Whether it was them, the chimney, or both, we'll never know. They sold the coal stove, and went back to burning wood. The hotter wood gasses created better draw in there short chimney.


what he said. :)

Bear in mind, 15' is a min. requirement and 10-2-3 rule has more to do w/ fire safety than proper draft. A stack should be a few feet taller than the highest part of the home's roof. People don't like to hear this because it might cost them more money or they have a tendency to think "good enough" or less will work "just fine". The problem is, it usually doesn't, especially in certain conditions such as mild weather, low stack temps, or unusual winds. Then they blame the stove in the house, the fuel, or God for their problems; If you're doing a chimney, do it right and exceed requirements to have good draft in most conditions.
Berlin
 
Hot Air Coal Stoker Furnace: Will-Burt Combustioneer 77B
Coal Size/Type: Ohio BITUMINOUS pea stoker coal

Re: Chimney replacement

PostBy: John518 On: Sat Jan 18, 2014 6:54 pm

Thank you for all the answers.
I now have something to work with.
The 2' by 10' rule is for safety and the 15 feet is for draft.
So with the following numbers
stove outlet to ceiling is 5'
ceiling to roof is 2.5'
I would need an 8' section to meet the 15' rule which would clear the roof peak by 5' to 6'
and it is 6" not 5"
John518
 
Hot Air Coal Stoker Stove: Alaska Liberty
Coal Size/Type: Rice

Re: Chimney replacement

PostBy: Flyer5 On: Sat Jan 18, 2014 10:05 pm

John518 wrote:Thank you for all the answers.
I now have something to work with.
The 2' by 10' rule is for safety and the 15 feet is for draft.
So with the following numbers
stove outlet to ceiling is 5'
ceiling to roof is 2.5'
I would need an 8' section to meet the 15' rule which would clear the roof peak by 5' to 6'
and it is 6" not 5"



Like it was stated the 15' is the recommended minimum to get a good draft. With a quality class A insulated pipe I have seen people get away with less. A chimney works on 2 principles. Warm air rises and atmospheric pressure is less the higher you go. Higher pressure travels toward the lower pressure. Welcome to the forum and good luck.
Flyer5
 
Stoker Coal Boiler: Leisure Line WL110
Hot Air Coal Stoker Stove: Leisure Line Pioneer

Re: Chimney replacement

PostBy: dcrane On: Sat Jan 18, 2014 10:37 pm

if your ontop of a lonely hill or have a neighbor with a wide slanted roof line directed from north east directly at your chimney cap toothy you might get away with an 8' chimney rise but typically id want to see at least 15'!
dcrane
 
Hand Fed Coal Stove: Crane 404