Chimney draft problems

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paulus
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Hand Fed Coal Stove: Saey 92 daily stove 80 % on coal and Wood 20% efel stoves oxford and efel montana and efel harmony 3 all sold, Dovre 750gm sold
Coal Size/Type: Antraciet from germany ibbenburen size. 20/30
Other Heating: Cv viessmann oil stoker, wood burner

Post by paulus » Sun. Dec. 10, 2017 1:11 pm

Hello everybody,
long ago on this forum, but still burning coal, I have a draft underpressure goage ,, I hope you understand me.

I have measured cold, medium hot and hot,

See the pictures.

My chimney is dubblewalled steenles steel and 275 inch high and 30 inch above the hood of my house,, so ithink this is ok.

I have no dampers in my chimney, my stove is 100% burning antraciet with hopper and the problem is whem i thurn the airdraft close for the night its stil burning red,,,, (no flames)

For my stove saey 92 wood and coal: it needs the best draft between 12 PA and 20 PA min 8 pa and max 20 pa.

So my chimney (cold) is about: 2 pa ????
(Medium hot) about 5 min wood burn: 10 PA
And 10 min on: 15 PA
When the stove is hot it is: 30/ thil 35 PA

Is this normal? Cold 2 PA hot its 35 ???

Thanx i hope you understand me a little

On my picture its 0,1 MBAR = 10 PA

Greets Paul (belgium)
Hello everybody,

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Last edited by paulus on Sun. Dec. 10, 2017 2:57 pm, edited 1 time in total.


 
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freetown fred
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Post by freetown fred » Sun. Dec. 10, 2017 1:23 pm

If you haven't lately, I would first check chimney for any kind of blockage--mirror & flashlight. I don't have a clue what a "pa" is but I do know what some blockage in the chimney can do.

 
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paulus
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Hand Fed Coal Stove: Saey 92 daily stove 80 % on coal and Wood 20% efel stoves oxford and efel montana and efel harmony 3 all sold, Dovre 750gm sold
Coal Size/Type: Antraciet from germany ibbenburen size. 20/30
Other Heating: Cv viessmann oil stoker, wood burner

Post by paulus » Sun. Dec. 10, 2017 1:35 pm

Hello Fred, thanx for comment,

Its not a blockage, the chimney is a new one,
PA its the draft pressure in the chimney but i think its: pascal.

Cold is my chimney draft to low
En medium hot its perfect
When its hot its very to high

So my coal birns to hard when al is close,

 
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michaelanthony
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Post by michaelanthony » Sun. Dec. 10, 2017 1:37 pm

freetown fred wrote:
Sun. Dec. 10, 2017 1:23 pm
If you haven't lately, I would first check chimney for any kind of blockage--mirror & flashlight. I don't have a clue what a "pa" is but I do know what some blockage in the chimney can do.
Fred if I'm understanding my research Paulus has a chimney that can suck a sheep though a straw. If 1 milibar = .4014 inches of water. I am drawing .04 inches of water in my flue as we speak.

Hi Paulus, welcome. What type of air inlet does your stove have. If you have a bi=metal thermostat it may need adjustment.

Paulus you may need a pipe damper to slow the draft down. A m.p.d. (manual pipe damper), or an automated one, (barometric pipe damper).

regards,

Mike.

 
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michaelanthony
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Post by michaelanthony » Sun. Dec. 10, 2017 1:39 pm


 
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paulus
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Hand Fed Coal Stove: Saey 92 daily stove 80 % on coal and Wood 20% efel stoves oxford and efel montana and efel harmony 3 all sold, Dovre 750gm sold
Coal Size/Type: Antraciet from germany ibbenburen size. 20/30
Other Heating: Cv viessmann oil stoker, wood burner

Post by paulus » Sun. Dec. 10, 2017 1:44 pm

Sorry, the 0,1 mbar = 10 PA

Yes Mike thats treu,
I have a bi metal thermostat and it may al close and i heave the ropes new so no leaks,

Here in belgium dee want no dampers in the pipe or something els for safety of co,, bit i think i mist buy a automatic damper so i instal manual the 15 PA what my stove needs to.

What happens with my draft when its cold,,, is this normal ? Its so very low 2 Pa

 
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Lightning
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Post by Lightning » Sun. Dec. 10, 2017 1:55 pm

Yes that is normal. Heat is what makes a chimney work. So when you add heat to the chimney, the pressure difference increases.


 
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Lightning
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Post by Lightning » Sun. Dec. 10, 2017 1:58 pm

paulus wrote:
Sun. Dec. 10, 2017 1:44 pm
Here in belgium dee want no dampers in the pipe or something els for safety of co,, bit i think i mist buy a automatic damper so i instal manual the 15 PA what my stove needs to.
If I'm understanding this right, you do not want a manual pipe damper? A barometric damper will automatically keep your draft at the right pressure.

 
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paulus
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Hand Fed Coal Stove: Saey 92 daily stove 80 % on coal and Wood 20% efel stoves oxford and efel montana and efel harmony 3 all sold, Dovre 750gm sold
Coal Size/Type: Antraciet from germany ibbenburen size. 20/30
Other Heating: Cv viessmann oil stoker, wood burner

Post by paulus » Sun. Dec. 10, 2017 2:48 pm

I just want to, but the government advises, sorry the manual valve for coal stoves this is because co safety ,,,,, the auomatic damper is ok, but its not so known in belgium.

I think this is what i need???

https://www.schoorsteenwinkel.info/a-43622461/ins ... s-rco-rvs/

And i install this whit a Tee-pipe..

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Post by lsayre » Sun. Dec. 10, 2017 2:58 pm

5 pascals = 0.02" water column
10 pascals = 0.04" water column
15 pascals = 0.06" water column
20 pascals = 0.08" water column
25 pascals = 0.10" water column
etc...

That looks like a nice barometric damper!!! But you should not use a barometric damper when burning wood.

 
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Lightning
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Post by Lightning » Sun. Dec. 10, 2017 3:14 pm

That is a nice automatic damper.

 
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paulus
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Location: Belgium
Hand Fed Coal Stove: Saey 92 daily stove 80 % on coal and Wood 20% efel stoves oxford and efel montana and efel harmony 3 all sold, Dovre 750gm sold
Coal Size/Type: Antraciet from germany ibbenburen size. 20/30
Other Heating: Cv viessmann oil stoker, wood burner

Post by paulus » Sun. Dec. 10, 2017 3:32 pm

So I have to take this one? I can find another one online, in the Netherlands or Belgium

 
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paulus
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Location: Belgium
Hand Fed Coal Stove: Saey 92 daily stove 80 % on coal and Wood 20% efel stoves oxford and efel montana and efel harmony 3 all sold, Dovre 750gm sold
Coal Size/Type: Antraciet from germany ibbenburen size. 20/30
Other Heating: Cv viessmann oil stoker, wood burner

Post by paulus » Sun. Dec. 10, 2017 3:34 pm

lsayre wrote:
Sun. Dec. 10, 2017 2:58 pm
5 pascals = 0.02" water column
10 pascals = 0.04" water column
15 pascals = 0.06" water column
20 pascals = 0.08" water column
25 pascals = 0.10" water column
etc...

That looks like a nice barometric damper!!! But you should not use a barometric damper when burning wood.
No? I thought it is always better?

 
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lsayre
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Post by lsayre » Sun. Dec. 10, 2017 3:36 pm

paulus wrote:
Sun. Dec. 10, 2017 3:34 pm
No? I thought it is always better?
Extremely dangerous in the event of a chimney fire. Will make a chimney fire worse.

 
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Lightning
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Post by Lightning » Sun. Dec. 10, 2017 3:50 pm

paulus wrote:
Sun. Dec. 10, 2017 3:32 pm
So I have to take this one? I can find another one online, in the Netherlands or Belgium
It's your choice ;)


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