Harman SF-250 Wood Burning

Harman SF-250 Wood Burning

PostBy: Timr On: Tue Nov 25, 2008 8:18 pm

To the guys that burn wood in the sf-250 are you able to maintain stack temps high enough to prevent creosote formation in the chimney?? The reason I ask is that with my Harman Hearth Hero I have to burn it wide open with a full load of wood just to get 300 or so on the stack and figured that the much larger firebox on the sf-250 would allow for a larger wood fire and higher exhaust temps.

Thanks

-Tim
Timr
 
Stove/Furnace Make: Harman
Stove/Furnace Model: Hearth Hero

Re: Harman SF-250 Wood Burning

PostBy: rockwood On: Tue Nov 25, 2008 8:36 pm

What type of thermometer are you using? Maybe it's reading low.
Have you noticed any creosote buildup yet?
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: Harman SF-250 Wood Burning

PostBy: Timr On: Tue Nov 25, 2008 8:52 pm

I have two magnetic thermometers on the single wall pipe and they read within 5 deg of each other. There is some creosote buildup not bad but I only burn wood when the temps are in the 40-50 during the day and 30-40 at night. The firebox is the size of a mark 1 so theres not much room to get a good fire going and that coupled with the flue exit in the back instead of on top results in lower exhaust temps, great for coal soso for wood.

-Tim
Timr
 
Stove/Furnace Make: Harman
Stove/Furnace Model: Hearth Hero

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Re: Harman SF-250 Wood Burning

PostBy: PC 12-47E On: Tue Nov 25, 2008 9:16 pm

Burning hard wood tn the Harmon SF-250 is OK if the heat exchanger fan is OFF.

Keep the Exhaust stack temp in the safe wood burn temp range...

The heat exchanger fan lowers the stack temp BIG TIME on my stove!

Nut Coal works very well.

Thanks, Restover
PC 12-47E
 
Hand Fed Coal Stove: Estate Heatrola, Jotul 507

Re: Harman SF-250 Wood Burning

PostBy: Cap On: Tue Nov 25, 2008 9:41 pm

In order to keep high stack temps burning wood in the SF250, one has to have a roaring wood fire going which means adding new logs every very often. This has been my experience. Ok for quick or short lasting heat but that's about it. My first 2 years I burnt a lot of wood and loaded up the flue with creosote. 100% coal now except if I need to reboot.
Cap
 
Hand Fed Coal Boiler: Harman SF 250, domestic hot water loop, heat accumulator

Re: Harman SF-250 Wood Burning

PostBy: PC 12-47E On: Tue Nov 25, 2008 10:08 pm

Cap has the BEST info on this COAL stove...
PC 12-47E
 
Hand Fed Coal Stove: Estate Heatrola, Jotul 507

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