Sharp Dressed Highboy

 
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Rob R.
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Stoker Coal Boiler: EFM 520
Hand Fed Coal Stove: Chubby Jr

Post by Rob R. » Mon. Feb. 20, 2017 5:53 pm

Based on a my experience with a few EFM's using a flue shared with an oil boiler, there is no reason to hook them up any differently than a second oil boiler...other than the code that treats stoker boilers like a wood stove, which I find ridiculous.

 
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Sunny Boy
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Location: Central NY
Hand Fed Coal Boiler: Anthracite Industrial, domestic hot water heater
Baseburners & Antiques: Glenwood range 208, # 6 base heater, 2 Modern Oak 118.
Coal Size/Type: Nuts !
Other Heating: Oil &electric plenum furnace

Post by Sunny Boy » Tue. Feb. 21, 2017 11:21 am

I'm not sure why a shared flue with different fuels is not allowed, but you can share a flue using the same fuel is ok. All the examples I 've seen of that rule don't explain why. I like to be able to find the reasoning behind it, like I found with how they rate stove's and stove pipe's the allowable distance to combustibles.

Paul

 
ben
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Post by ben » Tue. Feb. 21, 2017 5:33 pm

Question. Is the highboy designed to have more boiler water content? I don't think they make them anymore.

 
Pacowy
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Stoker Coal Boiler: H.B. Smith 350 Mills boiler/EFM 85R stoker
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Post by Pacowy » Tue. Feb. 21, 2017 7:30 pm

Yes, more boiler water and greater heat exchange surface. I don't think they've been made since the 1950's.

Mike


 
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Rob R.
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Stoker Coal Boiler: EFM 520
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Post by Rob R. » Wed. Feb. 22, 2017 6:26 am

ben wrote:Question. Is the highboy designed to have more boiler water content? I don't think they make them anymore.
The boiler itself was made by Fitzgibbons Boiler Company. I think it holds about 13 gallons more water than a regular 520. Maybe if you were running the stoker really hard the larger boiler would have an advantage, but heating a house on 4/5 teeth is a pretty easy task for any EFM. I could have just as easily put a 350 in dad's house and had heat to spare.

 
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franpipeman
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Stoker Coal Boiler: efm 520 stoker fitzgibbons pressure vessel
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Coal Size/Type: rice
Other Heating: alpine propane condensing boiler radiant floor

Post by franpipeman » Wed. Feb. 22, 2017 8:04 am

So I assume the high boy is a tubed boiler ? since its fitzgibbons?

 
Pacowy
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Stoker Coal Boiler: H.B. Smith 350 Mills boiler/EFM 85R stoker
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Post by Pacowy » Wed. Feb. 22, 2017 8:36 am

Yes, they are tube boilers. All else equal the larger heat exchange surface promotes efficiency, though the larger size of the boiler may also contribute to greater stand-by losses. The larger reservoir of hot water in the boiler also can be beneficial for DHW production, etc.

Mike

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