EFM700

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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Bigblock472ci
New Member
Posts: 6
Joined: Sun. Jan. 26, 2014 12:03 pm
Stoker Coal Boiler: Efm700
Hand Fed Coal Stove: Estate Heatrola
Coal Size/Type: Buck nut pea
Stove/Furnace Make: EFM 700

Post Tue. Jan. 28, 2014 1:13 pm

How high should a bed of coals be in an EFM 700?

Bigblock472ci
New Member
Posts: 6
Joined: Sun. Jan. 26, 2014 12:03 pm
Stoker Coal Boiler: Efm700
Hand Fed Coal Stove: Estate Heatrola
Coal Size/Type: Buck nut pea
Stove/Furnace Make: EFM 700

Post Tue. Jan. 28, 2014 1:17 pm

I have been on this site for 4 straight days now. what a great site.

Visit Alternate Heating Sytems

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Rob R.
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Posts: 11343
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 Tue. Jan. 28, 2014 1:38 pm

The fire is adjusted based on the size of the ash ring, not how high it is. But since you asked...when the stoker is working hard the fire should be slightly higher (maybe an inch?) than the top of the pot...not sunken in the center.

When the stoker has been running for at least 30-40 minutes without stopping, the fire should have about 2" of ash around it. The reason for this is that you don't want to blow air through ash, you want to blow it through coal that is burning. Air that is blown through ash just steals heat from the boiler on its way to the chimney.

To put it another way, when the stoker has run long enough for the fire to stabilize, you want the line between fire and ash to be along the inside edge of the pot ring.

Bigblock472ci
New Member
Posts: 6
Joined: Sun. Jan. 26, 2014 12:03 pm
Stoker Coal Boiler: Efm700
Hand Fed Coal Stove: Estate Heatrola
Coal Size/Type: Buck nut pea
Stove/Furnace Make: EFM 700

Post Sun. Feb. 09, 2014 10:28 am

Thanks

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