Harman SF160

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coalder
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Posts: 1008
Joined: Mon. Dec. 16, 2013 1:48 pm
Hand Fed Coal Boiler: harman sf 160
Coal Size/Type: Nut
Other Heating: wood parlor stove
Location: somewhere high in the catskill mountains

Post By: coalder » Sun. Feb. 04, 2018 9:20 am

Don, you are spot on with your assessment of the 160. Mine is a 4 grate unit & the firebox only measures 13 x 19 inch. To reduce this would definitely be counterproductive. However the 260 is definitely another story.
Jim

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wilder11354
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Posts: 1043
Joined: Sat. Jan. 29, 2011 10:48 pm
Hand Fed Coal Boiler: Harman SF260 Boiler
Hand Fed Coal Stove: Hitzer 50-93
Coal Size/Type: nut or pea, anthracite
Other Heating: crown oil boiler, backup.if needed
Location: Montrose, Pa.

Post By: wilder11354 » Sun. Feb. 04, 2018 3:42 pm

i run a sf260...recover in below10* temps is slow... better to have more BTU,s available and not use them, then to need them and not have them. firebox fill, aqua stat settings all play a part. I have had over heats.... in past 7 years...but outside temps change quickly. which really affect aqua stat settings, and fill practices. Good side..lower aqua stat settings mean longer continual draw on boiler..... but extreme low outside temps,inside temp maintainability will suffer. go bigger, learn the stove, and you should be fine.

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David...
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Posts: 188
Joined: Sun. Nov. 06, 2016 9:48 am
Hand Fed Coal Boiler: Franks 80k output
Hand Fed Coal Stove: Jotul 507B
Coal Size/Type: Nut
Location: RI

Post By: David... » Sun. Feb. 04, 2018 9:46 pm

I think it is better to go smaller and make up the difference, if any, with the oil or gas system. Extreme cold is not the norm here in New England. The smaller boiler will perform better in milder weather which is much more common.

David


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ASea
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Posts: 487
Joined: Thu. Nov. 27, 2014 8:55 pm
Hand Fed Coal Stove: Coal Chubby
Baseburners & Antiques: "Estate" Warm Morning 120
Coal Size/Type: Sherman Anthracite Nut/Stove from C&T Coal
Other Heating: Peerless Boiler with Cast Iron Baseboards
Location: Athol Massachusetts

Post By: ASea » Sun. Feb. 04, 2018 9:48 pm

My thought process is the unit is rated to 2200sqft I'm heating 1700. I'd rather have it running hot than idling. The 260 will be too big

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wilder11354
Member
Posts: 1043
Joined: Sat. Jan. 29, 2011 10:48 pm
Hand Fed Coal Boiler: Harman SF260 Boiler
Hand Fed Coal Stove: Hitzer 50-93
Coal Size/Type: nut or pea, anthracite
Other Heating: crown oil boiler, backup.if needed
Location: Montrose, Pa.

Post By: wilder11354 » Tue. Feb. 06, 2018 9:14 pm

ASea wrote:
Sun. Feb. 04, 2018 9:48 pm
My thought process is the unit is rated to 2200sqft I'm heating 1700. I'd rather have it running hot than idling. The 260 will be too big
good for 2200SFT? that a meaningless statement. unless you know the actual BTU loss of your house overall.... sq ft don't mean chit! its the BTU input needed to maintain a temp(btu input vs btu loss). lower outside temps...more btu loss. my house 2400 SQ FT, 2 story. glad i have the 260 for brutal and avg temps for winter... sf 260 idles fine..when in fringe temps run it on pea coal less air migration thru coal, will burn slower, aka idle along.

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David...
Member
Posts: 188
Joined: Sun. Nov. 06, 2016 9:48 am
Hand Fed Coal Boiler: Franks 80k output
Hand Fed Coal Stove: Jotul 507B
Coal Size/Type: Nut
Location: RI

Post By: David... » Wed. Feb. 07, 2018 7:37 am

I think the OP has a handle on the heat loss of his home.

David

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