Wood AND Coal fire

Wood AND Coal fire

PostBy: Stephen in Soky On: Wed Sep 23, 2009 12:29 pm

I want to try something I've not done in the past and need some advice. I've burned wood for many years & even with good seasoned/dry hickory or oak overnight burns are still hard to achieve. I'm using a wood circulator with grates, but not shaker grates. All air is supplied under the fire via a bi-metallic thermostat. I use a manual pipe damper. Good 6" Simpson Dura-Plus chimney up a primarily interior chase with excellent draw. Within a few miles of home I can get Bit stoker or lump ($75/ton) or Anthracite nut or lump ($240/ton). Obviously I'd like to try the bit first. I want to burn wood fires all day & evening then bank the fire with coal to maintain heat output throughout the night, then go back to wood the next day. Here's my questions:

Will ths work?
Will I need a barometric damper? If so that's kind of a deal breaker since I still want to burn wood.
What size Bit coal do I want?
How much should I put in at night?
How much dust inside & soot outside am I going to create using Bit only at night?

Ya'll don't know how much I appreciate your help on this, Stephen
Stephen in Soky
 
Stove/Furnace Make: Warm Morning
Stove/Furnace Model: 500

Re: Wood AND Coal fire

PostBy: coaledsweat On: Wed Sep 23, 2009 12:44 pm

I would not attempt this with anthracite without shaker grates.
coaledsweat
 
Stoker Coal Boiler: Axeman Anderson 260M
Coal Size/Type: Pea

Re: Wood AND Coal fire

PostBy: Berlin On: Wed Sep 23, 2009 7:37 pm

it should work fine w/ bit, but you'll have more ash, if you have an ashpan it's not a big concern. i would reccomend putting the largest size coal you can find under the wood before you go to bed and then loading it full, coal on bottom wood on top. you should be able to have enough coals left to refire it easily the next morning. soot? well that depends on three factors, the coal (how much soot the coal produces is not necessarily related to how "good" or "bad" the coal is but simply it's burning characteristics and volitile content) and how much coal you are burning vs. wood and how your appliance burns it. with bit coal you will have soot produced and you may have a few small pieces outside around/downwind of the stack that will only really be noticeable on snow; this soot is NOT harmfull to anything, paint, auto's etc. and will wash away with rain. If you have bitchy neighbors real close with white cars parked right under your chimney- bituminous coal may not be for you. another alternative would be to buy a bituminous stoker stove and heat with coal only - you would be able to heat an average home for under $500/year with bituminous coal, and, because it's a stoker, you won't have to tend it often and it will produce almost no soot/smoke. I know someone selling an almost new stokermatic in southern ohio for less than $1000
Berlin
 
Hot Air Coal Stoker Furnace: Will-Burt Combustioneer 77B
Coal Size/Type: Ohio BITUMINOUS pea stoker coal


Re: Wood AND Coal fire

PostBy: Stephen in Soky On: Wed Sep 23, 2009 7:42 pm

Thanks for the input. A coal stove (Hitzer 55 I think) is in my future, but I wanted to try this with my current stove this season.
Stephen in Soky
 
Stove/Furnace Make: Warm Morning
Stove/Furnace Model: 500

Re: Wood AND Coal fire

PostBy: Stephen in Soky On: Fri Dec 11, 2009 1:13 pm

This is a followup to say thanks to Berlin for his advice both in this thread and via PM. I'm very successfully burning bit lump and wood at night and consequently maintaining plenty of heat output to avoid the 2 AM feeding of my stove. Now if I can just learn to leave the stove alone instead of tending it early in the morning!

In case anyone is interested I still allow my stove to go to wood coals around 10:00 pm, then throroughly agitate the ash out with my ash hoe, place 2 small splits on either side of the firebox and load around 20-25 lbs of lump bit in between the splits. I immediately load the stove full of Hickory splits on/around the coal, close the feed door & leave the ash door cracked til the load is well ignited & the wood charred. I then close the MPD about half way & let the bimetallic thermostat run it til morning. I have determined the bigger the lump the better up to about football size.
Stephen in Soky
 
Stove/Furnace Make: Warm Morning
Stove/Furnace Model: 500

Re: Wood AND Coal fire

PostBy: davejerry On: Mon Jan 11, 2010 9:08 pm

Hi, i'm a new b on here. just wanted to know if i can do this with a Hotblast 1557M (from US Stove)? any help would be appreciated. thanks



Berlin wrote:it should work fine w/ bit, but you'll have more ash, if you have an ashpan it's not a big concern. i would reccomend putting the largest size coal you can find under the wood before you go to bed and then loading it full, coal on bottom wood on top. you should be able to have enough coals left to refire it easily the next morning. soot? well that depends on three factors, the coal (how much soot the coal produces is not necessarily related to how "good" or "bad" the coal is but simply it's burning characteristics and volitile content) and how much coal you are burning vs. wood and how your appliance burns it. with bit coal you will have soot produced and you may have a few small pieces outside around/downwind of the stack that will only really be noticeable on snow; this soot is NOT harmfull to anything, paint, auto's etc. and will wash away with rain. If you have bitchy neighbors real close with white cars parked right under your chimney- bituminous coal may not be for you. another alternative would be to buy a bituminous stoker stove and heat with coal only - you would be able to heat an average home for under $500/year with bituminous coal, and, because it's a stoker, you won't have to tend it often and it will produce almost no soot/smoke. I know someone selling an almost new stokermatic in southern ohio for less than $1000
davejerry
 
Stove/Furnace Make: Hotblast
Stove/Furnace Model: 1557M

Re: Wood AND Coal fire

PostBy: DOUG On: Mon Jan 11, 2010 9:38 pm

It should work fairly well. You will probably burn bit coal even better than his wood circulator. If I'm not mistaken, your 1557 has shaker grates.
DOUG
 
Stove/Furnace Make: CHUBBY, D.S.MACHINE BOILER
Stove/Furnace Model: CLAYTON 1600

Re: Wood AND Coal fire

PostBy: Stephen in Soky On: Wed Jan 13, 2010 6:54 pm

I believe you advised you're trying anthracite on another website??? If so, I'm no help as I only use Bit. I think if you search under the hand fired forums you'll find lots of threads about your unit. With shaker grates and obvious access to coal, have you thought about switching to coal altogether?
Stephen in Soky
 
Stove/Furnace Make: Warm Morning
Stove/Furnace Model: 500

Re: Wood AND Coal fire

PostBy: norway On: Sun Jan 12, 2014 8:38 pm

This is my first year with the hot blasts 1557M coal or wood stove I love it I have a 2800+ ft.² home and it really heats it well better then oil heat. I have forced air furnace I hooked it right into the furnace but I have not used the thermostat just the motors on the hot blast it blows it through the house beautiful. it is so warm that I have to keep it on low . I've been using wood but thought that I would try the coal I tried the not and the larger size and I don't find it Burns is hot as wood . I think I put too much coal on at once the first time I put it right on the hot embers of wood but I smothered it and didn't allow the coals to get as hot as they should of with the blue flame and you do that by putting a little at a time in. I tried it again and this time using the just the nut coal in small amounts , but I had to leave the bottom door open for it to burn completely or else coal stays coals don't burn to ash and it won't shake through grates ,the coal get stuck in the grates . So if anyone has any suggestions on what size coal I should use I would appreciate it, should I use P coal? would that be better or the larger coal or just keep the door open I hate to keep that door open at the bottom. I've used it in combination with the wood and it really helps stretch the wood out I'm running low
.
norway
 
Other Heating: hotblast 1557M coal/wood

Re: Wood AND Coal fire

PostBy: rockwood On: Sun Jan 12, 2014 11:02 pm

If you are burning bituminous coal (I can't tell for sure based on your posts) then larger sizes (lump) coal would be best. Lump coal shouldn't cause any problems with the grates and you can burn wood with it.
If you are using smaller sizes of coal, you'll need to be careful not to smother the live coals with fresh coal. Adding fresh coal in batches, banking it in the front or back area of the firebox while being sure to leave some of the live coals uncovered is best.
rockwood
 
Hot Air Coal Stoker Furnace: Stokermatic coal furnace
Hand Fed Coal Stove: Rockwood Stoveworks Circulator
Baseburners & Antiques: Malleable/Monarch Range
Coal Size/Type: Soft coal: Lump and stoker (slack coal)

Re: Wood AND Coal fire

PostBy: norway On: Mon Jan 13, 2014 11:07 am

THANX
:idea:
norway
 
Other Heating: hotblast 1557M coal/wood

Re: Wood AND Coal fire

PostBy: imaddicted2u On: Tue Jan 14, 2014 1:18 am

I'm pretty new to this too but I have been burning wood for some time and recently started burning some highly volatile bituminous coal and have learned from advice here and from experience that it is a must to have some draft over the fire to provide combustion air to burn off the volatiles.
I suppose that bit mixed with wood would eliminate the need for the over fire draft.
imaddicted2u
 
Hand Fed Coal Boiler: American Standard Severn (1957) on bituminous
Coal Size/Type: Unscreened-Fist sized lump to powder-Bituminous

Re: Wood AND Coal fire

PostBy: Lightning On: Tue Jan 14, 2014 4:04 am

imaddicted2u wrote:I suppose that bit mixed with wood would eliminate the need for the over fire draft.

Wood and bit coal both need over fire draft, don't they?
Lightning
 
Hand Fed Coal Furnace: Clayton 1537G
Coal Size/Type: Nut Size / White Ash

Re: Wood AND Coal fire

PostBy: imaddicted2u On: Tue Jan 14, 2014 8:56 am

Lightning wrote:
imaddicted2u wrote:I suppose that bit mixed with wood would eliminate the need for the over fire draft.

Wood and bit coal both need over fire draft, don't they?

That's what I thought too, I was thinking out loud, hoping for clarification.
imaddicted2u
 
Hand Fed Coal Boiler: American Standard Severn (1957) on bituminous
Coal Size/Type: Unscreened-Fist sized lump to powder-Bituminous

Re: Wood AND Coal fire

PostBy: Stephen in Soky On: Thu Jan 23, 2014 6:51 pm

I burn both, sometimes together, often each alone with only underfire air. The trick when burning only coal is to let the vols flare off before shutting down for a long burn. When burning together, you're exactly right, the wood fire takes care of the vols without needing quite so much attention immediately after loading. With bit, bigger size coal is easier as well with regards to burning off vols. I feel like the larger size coal continues to release vols throughout most of its useful burn which in turn keeps the heat up.
Stephen in Soky
 
Stove/Furnace Make: Warm Morning
Stove/Furnace Model: 500