Harman SF-250 Wood Burning

Modern and vintage hand fired coal stove are similar to a wood stove and in some cases can burn either. They need to be regulated and fed by hand usually every 12 to 24 hours depending on your usage. They require no power to operate making them ideal for rural settings with long power outages.
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Timr
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Posts: 5
Joined: Thu. Aug. 07, 2008 6:20 pm
Stove/Furnace Make: Harman
Stove/Furnace Model: Hearth Hero
Location: Hudson NH

Post Tue. Nov. 25, 2008 7:18 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

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rockwood
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Posts: 1371
Joined: Sun. Sep. 21, 2008 7:37 pm
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)
Location: Utah

Post Tue. Nov. 25, 2008 7:36 pm

What type of thermometer are you using? Maybe it's reading low.
Have you noticed any creosote buildup yet?
"None are more hopelessly enslaved than those who falsely believe they are free." -Goethe

Timr
New Member
Posts: 5
Joined: Thu. Aug. 07, 2008 6:20 pm
Stove/Furnace Make: Harman
Stove/Furnace Model: Hearth Hero
Location: Hudson NH

Post Tue. Nov. 25, 2008 7:52 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

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PC 12-47E
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Posts: 772
Joined: Tue. Nov. 25, 2008 11:45 am
Hand Fed Coal Stove: Estate Heatrola, Jotul 507
Location: Mid Coast, Maine

Post Tue. Nov. 25, 2008 8:16 pm

Burning hard wood tn the Harman 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
Glenwood "Modern Oak #116"
Fuller & Warren "Art Stewart #14" Baseburner
Jotul "507"
Gibraltar "CFS" brass doors

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Cap
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Posts: 1581
Joined: Fri. Dec. 02, 2005 10:36 pm
Hand Fed Coal Stove: Harman SF 250, domestic hot water loop, heat accumulator
Coal Size/Type: Nut and Stove
Other Heating: Heat Pumps
Location: Lehigh Twp, PA
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Post Tue. Nov. 25, 2008 8:41 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
Lehigh Twp.
Northampton Co., PA

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PC 12-47E
Member
Posts: 772
Joined: Tue. Nov. 25, 2008 11:45 am
Hand Fed Coal Stove: Estate Heatrola, Jotul 507
Location: Mid Coast, Maine

Post Tue. Nov. 25, 2008 9:08 pm

Cap has the BEST info on this COAL stove...
Glenwood "Modern Oak #116"
Fuller & Warren "Art Stewart #14" Baseburner
Jotul "507"
Gibraltar "CFS" brass doors

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