Will a e·f·m Coal Stoker Boiler DF520 heat 3420 sq ft

Will a e·f·m Coal Stoker Boiler DF520 heat 3420 sq ft

PostBy: wantab coal burner On: Sat Feb 12, 2011 8:15 pm

I'm New and I've been looking through the forum and found some interesting info. I have burned wood/ coal since I was a kid. More wood than coal though. So my question is will the e·f·m Coal Stoker Boiler DF520 handle 3420 Sq FT. The figures I'm getting are 20lbs per hour is that correct.
wantab coal burner
 

Re: Will a e·f·m Coal Stoker Boiler DF520 heat 3420 sq ft

PostBy: Sting On: Sat Feb 12, 2011 8:28 pm

It depends

Do you have 3420 Sq FT of well insulated tight structure -- or a 3420 Sq FT corn crib :?:

WNY wrote:Normally you should do a Heat Loss calc. for your house, that would get your close. How much is your existing boiler output? or do you know how much baseboard elements you current have? Most use 500-600BTU per Foot output. I believe there are link in some other threads for HEAT LOSS CALCULATOR. This has been discussed many times.

You might be surprised on the output. Coal is different than gas, oil, etc... My smaller coal stove only has a small 6" x 12" burn plate and puts out 90K btu's. COAL has a very high BTU output. So, you don't need much to get a lot of heat out of it. Plus with a boiler, you have a lot of volume to keep warm, once it gets warm, it doesn't need as much BTU, with coal, even at IDLE, it will keep the water up to a certain temp.

I know the Harmen VF3000 is rated like 95K BTU and states it will heat up to 3000 sq. ft. It all depends on your system, house insulation, windows, etc.....

What's your heat loss?
Sting
 
Other Heating: BurnHAM=NG-gas

Re: Will a e·f·m Coal Stoker Boiler DF520 heat 3420 sq ft

PostBy: wantab coal burner On: Sat Feb 12, 2011 9:18 pm

its well insulated brick and a hire r value
wantab coal burner
 

Re: Will a e·f·m Coal Stoker Boiler DF520 heat 3420 sq ft

PostBy: Rob R. On: Sat Feb 12, 2011 9:33 pm

Corn crib...I like that one Sting.

If the house has any level of insulation and the snow isn't blowing through the windows...a 520 should do the job. A detailed heat loss calculation or an analysis of your current heating system size vs. performance will help answer your question as well.

Food for thought...I heat about 3500 sq.ft of old house that gets blasted with wind, 5 teeth on the EFM takes care if it even at -20.

Does your house have hot water or steam radiation??

-Rob
Rob R.
 
Stoker Coal Boiler: EFM DF520
Hand Fed Coal Stove: Hitzer 50-93
Other Heating: Dad's 1953 EFM Highboy


Re: Will a e·f·m Coal Stoker Boiler DF520 heat 3420 sq ft

PostBy: Sting On: Sat Feb 12, 2011 9:47 pm

Don't listen to the salesman - or me

Do the heat loss calculation for yourself and prove to yourself and determine your load.

THEN -- go looking for the proper appliance to fit that load.
Sting
 
Other Heating: BurnHAM=NG-gas

Re: Will a e·f·m Coal Stoker Boiler DF520 heat 3420 sq ft

PostBy: AA130FIREMAN On: Sat Feb 12, 2011 11:02 pm

How many btu's is your current boiler ? Does it keep up, how long does it run on the coldest day of the year ?
AA130FIREMAN
 
Stove/Furnace Make: axeman anderson
Stove/Furnace Model: 130 anthratube

Re: Will a e·f·m Coal Stoker Boiler DF520 heat 3420 sq ft

PostBy: wantab coal burner On: Sat Feb 12, 2011 11:20 pm

Don't have all of those details its a foreclosure I'm putting an offer in on it. It kinda scared me when I was in the basement with 6- 275 gal oil tanks but then I thought Coal with and oil back up is the only way to go.
wantab coal burner
 

Re: Will a e·f·m Coal Stoker Boiler DF520 heat 3420 sq ft

PostBy: AA130FIREMAN On: Sat Feb 12, 2011 11:22 pm

wantab coal burner wrote: It kinda scared me when I was in the basement with 6- 275 gal oil tanks

I don't believe that would make code if you're in PA, I thought 2 was the limit inside.
AA130FIREMAN
 
Stove/Furnace Make: axeman anderson
Stove/Furnace Model: 130 anthratube

Re: Will a e·f·m Coal Stoker Boiler DF520 heat 3420 sq ft

PostBy: whistlenut On: Sat Feb 12, 2011 11:29 pm

The heat loss will verify what you suspect: Of course it will heat it, but you sure don't want to be running at 10 teeth and 10 air and sucking down 20 lbs an hour. That would be 20lbs times 13,000 BTU's per pound, times 80% boiler efficiency, or 260,000*80%.....208,000 btu available at your greatest heat demand period. I'll bet your heat loss will show peak demand at about 145,000 btu. Get the real numbers before you make a definitive plan. :idea: :idea: :idea:
550 gallons is the limit here also....but that is today, who knows what the code was when it was first installed.....or added to.
I hate to add this comment, but I DO know a guy who was getting divorced....and the soon to be ex was living in the house....he paid all the expenses, heat electric, etc. She would leave for work at 7AM with all the windows in the house open and the TT's at 80 degrees. 3000.00 a month in Dec, Jan, Feb, March of 2009/2010 in a brand new house. Ouch!!!!
Last edited by whistlenut on Sat Feb 12, 2011 11:37 pm, edited 2 times in total.
whistlenut
 
Stoker Coal Boiler: AA130's,260's, AHS130&260's,EFM900,GJ&VanWert
Hand Fed Coal Boiler: Franks Boiler,Itasca415,NYer130,Van Wert
Hot Air Coal Stoker Furnace: Yellow Flame
Hot Air Coal Stoker Stove: Alaska-4,Keystoker-2,
Hand Fed Coal Stove: Alaska,Gibraltor,Keystone,Vc Vigilant 2
Hand Fed Coal Furnace: Van Wert, NYer's, Ford,Jensen.
Coal Size/Type: Rice,Buck,Pea,Nut&Stove
Other Heating: Oil HWBB

Re: Will a e·f·m Coal Stoker Boiler DF520 heat 3420 sq ft

PostBy: Sting On: Sat Feb 12, 2011 11:34 pm

I wonder about heating a family dwelling equal to a semi load of coal a year.

And that maybe points to the why of the foreclosure :?:

Just saying :|

Folks think I am / was / are nuts for heating this little place.
Sting
 
Other Heating: BurnHAM=NG-gas

Re: Will a e·f·m Coal Stoker Boiler DF520 heat 3420 sq ft

PostBy: stoker-man On: Sun Feb 13, 2011 12:05 pm

The calculated heat load at efm was about 450K and 7000 sq. ft. with no insulation at all. Unofficially, I would think your house would be easy to do with one 520. I have the efm heat load calculator on this computer, but it's time consuming if done properly.
stoker-man
 
Hand Fed Coal Boiler: 1981 efm wcb-24 in use 365 days a year
Coal Size/Type: Anthracite/Chestnut
Other Heating: Hearthstone wood stove

Re: Will a e·f·m Coal Stoker Boiler DF520 heat 3420 sq ft

PostBy: coal berner On: Mon Feb 14, 2011 1:31 pm

whistlenut wrote:The heat loss will verify what you suspect: Of course it will heat it, but you sure don't want to be running at 10 teeth and 10 air and sucking down 20 lbs an hour. That would be 20lbs times 13,000 BTU's per pound, times 80% boiler efficiency, or 260,000*80%.....208,000 btu available at your greatest heat demand period. I'll bet your heat loss will show peak demand at about 145,000 btu. Get the real numbers before you make a definitive plan. :idea: :idea: :idea:
550 gallons is the limit here also....but that is today, who knows what the code was when it was first installed.....or added to.
I hate to add this comment, but I DO know a guy who was getting divorced....and the soon to be ex was living in the house....he paid all the expenses, heat electric, etc. She would leave for work at 7AM with all the windows in the house open and the TT's at 80 degrees. 3000.00 a month in Dec, Jan, Feb, March of 2009/2010 in a brand new house. Ouch!!!!

Max feed rate at 10 teeth is 25lbs per hr 2.5 lbs per tooth with Rice coal Buckwheat size is 2 lbs per tooth
8 teeth is 20lbs per hr with Rice . 16 lbs Per hr with buck
1300 btu per lb is on the low side of Anthracite you can get 13.500 up to 14.000 btu per lb if you know where to go .
When a efm is set up correctly & maintained correctly it will do 85% efficiency 24/7
Anything below 80% it's time for some maintenance .
coal berner
 
Stoker Coal Boiler: 1986 Electric Furnace Man 520 DF
Stove/Furnace Make: Electric Furnace Man
Stove/Furnace Model: DF520

Re: Will a e·f·m Coal Stoker Boiler DF520 heat 3420 sq ft

PostBy: scrapper_23jr On: Sat Feb 26, 2011 7:29 pm

NO PROBLEM, i have 520s doing 4500sq.ft. if you know how to set them up SCRAPPER
scrapper_23jr
 

Re: Will a e·f·m Coal Stoker Boiler DF520 heat 3420 sq ft

PostBy: vermontday On: Sun Feb 27, 2011 10:19 am

We heat a 4,200 sq ft house with an EFM on a teeth setting of 5 out of a possible 10. It easily keeps up at 20 below.

The EFM boiler is just as reliable as an oil boiler, except it is better, because with a lower fuel cost, you leave your thermostats higher without any guilt of sending your money overseas. And those unlimited hot showers are sweet! You will not regret installing this boiler.

Also EFM has a low auger angle, making it ideal for a skid/bulk bag feed. This allows you effortlessly load 1-1/4 tons of coal on in 5 minutes so you can run weeks without having to feed it.
vermontday
 
Stoker Coal Boiler: EFM 520