What Is the Usual Stack Temperature of Your EFM Stoker?

Stoker Coal Boilers automatically feed the coal and have controls and pumps just like any conventions boiler. They are intended to be used as a primary heat and often have domestic hot water coils as an added bonus. They can be set up independently or in dual sytem with your existing oil/gas boiler. They can accommodate both hot water base board or steam plumbing.
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stoker-man
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Posts: 2063
Joined: Mon. Nov. 19, 2007 9:33 pm
Hand Fed Coal Boiler: 1981 efm wcb-24 in use 365 days a year
Coal Size/Type: Anthracite/Chestnut
Other Heating: Hearthstone wood stove
Location: Lehigh Valley, PA

Post Tue. Jun. 10, 2008 11:18 am

Stoking and resting?
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e.alleg
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Posts: 1285
Joined: Fri. Feb. 16, 2007 10:31 am
Stove/Furnace Make: EFM
Stove/Furnace Model: 520
Location: western ny

Post Tue. Jun. 10, 2008 6:46 pm

Stoking mine gets hot enough to touch for 2-3 seconds without getting burned, probably 250 degrees. Idling you can leave your hand on it, maybe 120 degrees or less. These are all taken after the barometric damper. In the summertime the pipe is cold all the time, the stoker doesn't run enough t0o warm the pipe.
Burning coal is definitely worth the extra work involved.
"Good enough" is not good enough.

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stoker-man
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Posts: 2063
Joined: Mon. Nov. 19, 2007 9:33 pm
Hand Fed Coal Boiler: 1981 efm wcb-24 in use 365 days a year
Coal Size/Type: Anthracite/Chestnut
Other Heating: Hearthstone wood stove
Location: Lehigh Valley, PA

Post Tue. Jun. 10, 2008 7:49 pm

Thanks, any more replies?
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Visit Alternate Heating Sytems

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Rob R.
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Posts: 11345
Joined: Fri. Dec. 28, 2007 4:26 pm
Stoker Coal Boiler: EFM DF520
Hand Fed Coal Stove: Hitzer 50-93
Coal Size/Type: Lehigh Rice
Other Heating: Dad's 1953 EFM Highboy
Location: Chazy, NY

Post Wed. Oct. 26, 2011 6:42 pm

I know this is a very old post, but I finally got around to installing a probe-type thermometer in my EFM's flue pipe. With the thermometer installed about three feet from the flue outlet, and just before the baro, I observed 105 degrees F with the boiler resting (25 minutes since last timer cycle). After 20 minutes of stoking I observed 275 degrees F. After 30-45 minutes of stoking it was up to 315 degrees, and seemed to plateau there. All readings were taken with the boiler water at approximately 150 degrees. The heat exchanger was cleaned about 3 weeks ago, and the stoker is running 4 teeth, 4.25 air...burning rice.

maxpower_454
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Post Mon. Jul. 06, 2015 12:39 pm

Thanks very much Rob. This is great information.

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coal stoker
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Posts: 346
Joined: Tue. Feb. 17, 2015 5:07 pm
Stoker Coal Boiler: 1986 EFM DF520
Coal Size/Type: Rice/Anthracite
Other Heating: oil fired boiler

Post Fri. Nov. 06, 2015 7:48 pm

I have a temp. probe in my stack and have had temps around 380 deg. F during a heating call.
CS

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