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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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Geoman
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Posts: 11
Joined: Tue. Nov. 25, 2008 7:54 pm
Stove/Furnace Make: EFM
Stove/Furnace Model: DF 520
Location: Kutztown, PA
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Post Tue. Nov. 25, 2008 8:47 pm

Hi guys I'm new to the site and need to bone up on just how these EFM units work... it's all new to me. I picked up a used DF 520 that I plan on using to heat my new shop. The shop is 40 w x 80 l x 20 h with R 19 in the walls and R 30 in the ceiling. To start with I will only be heating 1/3 of the shop with the boiler by way oh heat exchangers. My first question is must I use a 8 " smoke stack or can I down size it to 7". I salvaged about 18' feet doubled wall 7" from a building that was going to be leveled. If not I'll just try to sell it and get the 8".

Thanks

Pat

lincolnmania
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Posts: 828
Joined: Fri. Jan. 26, 2007 9:55 pm
Hot Air Coal Stoker Furnace: efm af-150 1982
Hot Air Coal Stoker Stove: alaska kodiak stoker 1986
Hand Fed Coal Stove: warm morning 1980 kenmore
Location: newtown/zerbe pa
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Post Wed. Nov. 26, 2008 4:18 am

welcome pat!
you will do fine with that 520.......i am heating a 40x80 shop with very little insulation with a efm af150 that I saved from the scrap yard in 2006

Geoman
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Posts: 11
Joined: Tue. Nov. 25, 2008 7:54 pm
Stove/Furnace Make: EFM
Stove/Furnace Model: DF 520
Location: Kutztown, PA
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Post Wed. Nov. 26, 2008 4:48 am

Thank you for the warm welcome lincolnmania. Do you think that the 7" smoke stack will be OK?

Pat

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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 Wed. Nov. 26, 2008 6:04 am

Hi and welcome. Let's put it this way: If you go to the trouble of installing undersized pipe and you have a CO problem, do you really want to replace it with the proper sized pipe?

It's a close call. It might work and it might not, depending upon your draft. I'd be tempted to try it in my own shop, but officially, it must be 8 inch pipe.
‹(•¿•)›

Geoman
New Member
Posts: 11
Joined: Tue. Nov. 25, 2008 7:54 pm
Stove/Furnace Make: EFM
Stove/Furnace Model: DF 520
Location: Kutztown, PA
Contact:

Post Wed. Nov. 26, 2008 6:13 am

Stoker-Man thank you for your incite!!!
What are my options with regards to stack piping?
Do I have to use double wall piping?
Keep in mind that all the stack piping will be inside the building.

Pat

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Pa Dealer
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Posts: 244
Joined: Fri. Aug. 15, 2008 10:12 am
Stoker Coal Boiler: EFM 520 DF
Coal Size/Type: Rice
Other Heating: Keystoker
Stove/Furnace Make: EFM DF 520
Stove/Furnace Model: Keystoker
Location: NEPA

Post Wed. Nov. 26, 2008 7:28 am

Single wall 24 or 26 guage pipe is fine for indoors, keeping combustible clearances in mind.

RY

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Geoman
New Member
Posts: 11
Joined: Tue. Nov. 25, 2008 7:54 pm
Stove/Furnace Make: EFM
Stove/Furnace Model: DF 520
Location: Kutztown, PA
Contact:

Post Wed. Nov. 26, 2008 7:36 am

PA Dealer how far off the drywall do I need to keep the stack?

Thanks

Pat

Geoman
New Member
Posts: 11
Joined: Tue. Nov. 25, 2008 7:54 pm
Stove/Furnace Make: EFM
Stove/Furnace Model: DF 520
Location: Kutztown, PA
Contact:

Post Wed. Nov. 26, 2008 9:03 am

OK so I add a slide show of what I'm working with so hopefully it will work. Just click on the picture and it shoutd start and at any point you can click on any picture and it will enlarge it. Where do I start :?

Pat
Last edited by Geoman on Sat. Apr. 01, 2017 1:12 am, edited 2 times in total.
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User avatar
stoker-man
Verified Business Rep.
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 Wed. Nov. 26, 2008 12:09 pm

Download the manual of the DF520 off the efmheating.com website. It will answer most of your questions.
‹(•¿•)›

Geoman
New Member
Posts: 11
Joined: Tue. Nov. 25, 2008 7:54 pm
Stove/Furnace Make: EFM
Stove/Furnace Model: DF 520
Location: Kutztown, PA
Contact:

Post Wed. Nov. 26, 2008 1:56 pm

Stoker-Man belive or not the Installation and Operationg came with the sale. :D Is there anything I sould replace before putting things back together I.E. rope casket ?

Pat

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