Adding Secondary Air to Buck Stove

 
corey
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Post by corey » Wed. Nov. 02, 2016 11:07 am

Wow I'm lost for words.

Tech support said coal don't need above fire air. I calied about my stove not having it.
Last edited by corey on Sat. Apr. 01, 2017 11:50 am, edited 2 times in total.
Reason: Changed title per posters request.


 
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freetown fred
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Post by freetown fred » Wed. Nov. 02, 2016 11:17 am

They're right C, coal don't need it! ;)

 
corey
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Post by corey » Wed. Nov. 02, 2016 11:28 am

freetown fred wrote:They're right C, coal don't need it! ;)
I think it would really help with burning bituminous like I have.

 
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Post by freetown fred » Wed. Nov. 02, 2016 11:45 am

Indeed it would/will! :)

 
corey
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Post by corey » Wed. Nov. 02, 2016 11:59 am

I guess I should have mentioned bituminous on the phone.

It burns the coal as is but it could be improved.
They seem to think also it might be to hot for the stove. With an above the fire air. I ask if I could add another air vent. The reply was no just seems odd to me.

 
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Post by freetown fred » Wed. Nov. 02, 2016 4:32 pm

As a combo stove--it would be for wood or coal????????????? It makes no sense there is not an over fire vent of some sort?????????????

 
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Post by corey » Wed. Nov. 02, 2016 5:38 pm

freetown fred wrote:As a combo stove--it would be for wood or coal????????????? It makes no sense there is not an over fire vent of some sort?????????????

Yeah wood and coal.

No air vents above fire don't make since does it.


 
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warminmn
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Post by warminmn » Wed. Nov. 02, 2016 6:12 pm

I would definetly add it before throwing bit in it or you may hear an explosion you've never heard before.

Are you sure there is not an air route from underneath that gives overfire air somehow?

 
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Post by corey » Wed. Nov. 02, 2016 6:22 pm

warminmn wrote:I would definetly add it before throwing bit in it or you may hear an explosion you've never heard before.

Are you sure there is not an air route from underneath that gives overfire air somehow?
Ohh yeah done had an explosion it was interesting.

I do have someone who is going to help me with adding an air vents this year. Should improve the stove a lot.

 
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Post by corey » Wed. Nov. 02, 2016 6:24 pm

corey wrote:
warminmn wrote:I would definetly add it before throwing bit in it or you may hear an explosion you've never heard before.

Are you sure there is not an air route from underneath that gives overfire air somehow?
Ohh yeah done had an explosion it was interesting.

I do have someone who is going to help me with adding an air vents this year. Should improve the stove a lot. Last year I had smoke puff out the bottom door followed by a WHOOOOOSH going up the pipes.

 
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Post by corey » Thu. Nov. 03, 2016 12:03 am

One question I add this vent. Its purpose is to help ignite gasses and the bottom air still control heat output? Or would the load door vent do that also?

 
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Post by SWPaDon » Thu. Nov. 03, 2016 12:39 am

corey wrote:One question I add this vent. Its purpose is to help ignite gasses and the bottom air still control heat output? Or would the load door vent do that also?
Yes, the load door vent will do that also........to a degree. You will need to play with both to get the balance that your particular coal needs.

 
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Sunny Boy
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Post by Sunny Boy » Thu. Nov. 03, 2016 7:52 am

Coal burns from the bottom up - wood from the top down. That gives you an idea where the majority of air must be fed.

The main supply of air (primary air) to burn coal has to come in under the grates. But, as coal burns it produces volatile gases, which should also be burned or the potential heat from them is wasted up the chimney. That's what the secondary air over the firebed does. Bit coal has a lot more volatiles than anthracite, so that's why the better bit stoves are designed to preheat and feed more secondary air over the firebed.

Some anthracite stoves, such as the Glenwood base heaters and oaks, come with special secondary air distribution because they are also meant to burn wood, and as a result, they will do a pretty good job with bit coal.

Also, not constantly burning off those volatile gases risks a puff-back, which can have enough explosive force to damage the stove and anything near by. :shock:

Any coal stove should have some way of feeding secondary air.

Paul
Last edited by Sunny Boy on Thu. Nov. 03, 2016 12:27 pm, edited 1 time in total.

 
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Post by Sunny Boy » Thu. Nov. 03, 2016 8:05 am

By the way. Others who have talked to, or bought stoves from, companies that make wood stoves that are converted to handle coal have run into the problem that talking to folks at the stove company they don't really know much about burning coal.

It doesn't necessarily mean the stove isn't able to burn coal, it just means they were talking to wood burners who don't know how to burn coal.

Of what I've seen of the modern "combo" stoves, they are typically designed as wood stoves first, with coal grates as an option to gain more sales. The grates are often a flat grillwork that is not good at breaking up any clinkers that try to form, so properly clearing ash can be a problem.

The better combo stoves are designed to burn coal well and do a better job of clearing ash. Then they can handle wood also - usually by just the addition of a placing a wood burning plate sitting on top of the coal grates.

Paul

 
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Post by corey » Thu. Nov. 03, 2016 10:21 am

Thank you Sunny Boy.

The grates on the stove work really well. The door has little window I plan on taking it out. Then adding a peace of metal the I can adjust side to side.


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