Chimney question

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dbsuz05
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Post by dbsuz05 » Fri. Dec. 27, 2019 1:56 pm

What type of chimney do you guys think is best/cost effective. Block with clay liner. Or triple wall stainless?

 
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franpipeman
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Post by franpipeman » Fri. Dec. 27, 2019 3:34 pm

Lots of disputes on this issues block with clay liner is good ,long lasting buy labor intensive . but i would recommend insulating it ,some dont why to keep your draft going on moderate weather days like a foggy night at 49 degrees. Stainess steel should be insulated also and be sure you buy a liner with the right grade of stainless as coal fumes and water vapor make a acidic liquid I have had a stainless steel insulated chimney and I have had no problems as this point but i order the 316 ti or 316L it offers resistance to the fumes. Many times your stainless fittings like the top hat and others will not be 316l and may corrode early Warranties for the stainless will most likely require verified professional cleaning yearly so check that out. Mine is not triple wall but a 8 inch flex stainless insulated inside at 12 inch school 40 pipe thus I am unfamiliar with the triple wall stainless weather or not that is coal rated.
"What is the difference between 316L and 316Ti? ... The simple truth is 316L and 316Ti are both excellent products. 316L has virtually the same amount of Titanium for high temperature stability as 316Ti but it also includes Molybdenum. This is what gives 316L greater corrosion resistance against low temperatures."
Last edited by franpipeman on Fri. Dec. 27, 2019 7:02 pm, edited 1 time in total.

 
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StokerDon
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Post by StokerDon » Fri. Dec. 27, 2019 5:30 pm

Block with a clay liner is always the best choice.

Triple wall is for wood stoves, not coal. It uses an air gap to lower the temperature to combustibles. This generally is bad for coal because of the low amount of heat that will get into the chimney. The chimney will then become to cool to maintain a draft.

If you are going with stainless, it has to be insulated so you can maintain a draft.

-Don


 
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dbsuz05
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Post by dbsuz05 » Sun. Dec. 29, 2019 12:48 pm

StokerDon wrote:
Fri. Dec. 27, 2019 5:30 pm
Block with a clay liner is always the best choice.
You got all the answers don. I kinda figured Masonary was gonna be the best way to go. And it sure looks a lot sturdier than 25 feet of stainless steel going up the side of my red bricked garage.

 
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coalkirk
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Post by coalkirk » Sun. Dec. 29, 2019 12:51 pm

And with just burning coal should last a VERY long time.

 
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CoalJockey
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Post by CoalJockey » Sun. Dec. 29, 2019 1:01 pm

Block w/ clay liner wins with coal hands down every time. Stainless is alright for a temporary flue but sulphur will eventually rot it.

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