EFM 700 - Looking for history, specs etc.

I'm new to the stoker boiler scene and have been researching some boiler sizes I will need for my steam heated home. My house, with one-pipe steam will need 245,000 BTU.

I'm interested in EFM and I understand that the EFM 700 will fill my needs well.

I'd like to learn more of its history, like dates of manufacture, pot size, BTU ratings and other physical descriptors like width, height and weight. Also, when set up for steam how many supply pipes are there and what is/are the diameter(s)?

My basement has access only by a steep stairwell through Bilco doors. Can the unit be broken down?

Thanks

Townsend

Stoker-man is the guy you want to talk to. He is an EFM rep and can give you all the info and more. You can try to PM him but I am sure he will respond.

Forum member "coal berner" will also have a lot of information to offer about the model 700, I'm sure he will provide the details soon.

The boiler, base, and stoker can all be separated from one another to simplify the trip into the basement. Here is a picture of a 700 base & stoker, courtesy of forum member LsFarm:



Notice that the stoker can be mounted on the left, right, or front of the base. It is a serious piece of heating equipment.

-Robert

Also note that the burn pot rotates on that stoker.

How many square feet are you heating? Well insulated or not insulated?

I'm moving this thread to the "EFM" heading.

From the Archives: Parts Catalog S-30, 35, 45 Stokers Stoker parts catalog

From the Archives: Parts Catalog efm 700,900,1300 Boiler parts catalog

The 700 has been out of production since the '70s, but probably anything you need is still available through used parts dealers. Anczarski, in Shenandoah might even have new parts available (Mark's Plumbing)

I don't have the specs handy, but your heat load is within the capability of the 700.

The 700 was before stoker mans time at E.F.M. And coalberner gets all his info. from me so heres what i know. 1973 was the last year of production as far as i know. These units are interchangable as far as feed from the left,right and front. Overall height 42 inches, height 56 inches width 30 inches, total weight 1833lbs. Boiler1100 lbs. base 266lbs. stoker375lbs. jacket 132lbs. Steam gross square foot 950, net 700. Water gross square foot 1520 net 1120 .Steam and water gross b.t.u.224,000-net 168,000 Which i could never figure out, these units have a s-30 unit which means it will push 30 pounds per hour. If you take 30 pounds per hour and multiply it by 13,000 b.t.u. per pound it adds up to 390,000 b.t.u. Why they are so underated i dont know, I can modify a 520 to produce as much as what they are claiming. Anyway 3 inch outlet, 2 inch return, recomended chimney size 8 by 12 inches, 7 gallon coil, and a one sixth horse motor. These units feed on a 90 degree angle thru a transfer box which in turn rotates the transmission at the end of the pot which rotates the pot to drop the ash. They also are a self cleaning unit as far as the fines go, there is a tumbler in the pot assembly which cleans the fines out automatically. Off the top of my headf i dont remember the pot size but it is only a few inhes bigger than the 520. There are aftermarket parts availabe thru MARKS SUPPLY or through me, i also make parts for these units as well as others.I currently have 5 - 700 units in the shop to be rebuilt.Hope this helps, any questions contact me and i will do what i can. THANX SCRAPPER.

Thanks to all and especially Scrapper for the great info. I'm liking that boiler more and more. Sounds like one heavy duty unit and definitely under rated in terms of BTU with that 30 pound pot. The 1100 pound base sounds like a hell of a slide down into the basement. My tractor only weighs 2400lbs!

According to my record book, the first 700 was sold on 7/18/1958 to the Anthracite Institute. The last 700 was sold on 2/16/1977 to Russel Schade. 1973 was the cut-off date for most sales. From Jan. 1974 thru 1977, a total of 10 units were sold. About 1250 700s were produced from 1958-1977.

Townsend,

I would highly recommend to purchase through Scrapper. Scrapper and Coal Berner are extremely knowledgeable to these units. I have recently made a purchase from them and was very satisfied. EFM is the "Rolls-Royce" ( to JC) of burning and I cant wait to fire mine.

Townsend wrote:Thanks to all and especially Scrapper for the great info. I'm liking that boiler more and more. Sounds like one heavy duty unit and definitely under rated in terms of BTU with that 30 pound pot. The 1100 pound base sounds like a hell of a slide down into the basement. My tractor only weighs 2400lbs!

This Info did come from EFM SPECIFATIONS & DIMMENSIONS Form AP-245R -67
The boiler top is 1100 lbs
The base is 226 lbs
The Stoker W/pot is 375lbs
The Jackets are 132lbs
Total weight is 1833 lbs
Heating surface sq. ft. is 43.3
Outlet size 3"
Returns are 2"
Steam Gross Sq. Ft. 950 Net Sq. Ft. 700
Water Gross Sq. Ft. 1520 Net Sq.Ft. 1120
Water & Steam Gross BTU 224.000 Net. BTU 168.000
Max feed rate lbs of coal Per Hour 30lbs Reed Rate Per Tooth 3 lbs per Hour Per Tooth
Boiler Top 33" Tall 29.5" Wide 42" long
Base 23.5" tall 29 3/4" wide 42 3/4" long
Flue/Breach outlet 9"
As it was said already max feed rate is 30lbs per hour 10 teeth max each tooth is 3 lbs per hour .
One has to subtract 15 to 20% for heat loss 13.500 X 30 or whatever the coal your going to be using

is rated for BTU lbs per hour 13.500 per lb X 30lbs per hour = 405.000 btu's per hour Input 100% At 80% efficiency
you would subtract 20% for heat loss / output - Subtract 81.000 loss = 324.000 Gross output

Off of efm website is the manual for the 900 but it will show you how the 700 900 & 1300 work and how different they are from a 350 or 520

http://www.efmheating.com/manuals/Stoker%20Manual.pdf

scrapper_23jr wrote:The 700 was before stoker mans time at E.F.M. And coalberner gets all his info. from me so heres what i know. 1973 was the last year of production as far as i know. These units are interchangable as far as feed from the left,right and front. Overall height 42 inches, height 56 inches width 30 inches, total weight 1833lbs. Boiler1100 lbs. base 266lbs. stoker375lbs. jacket 132lbs. Steam gross square foot 950, net 700. Water gross square foot 1520 net 1120 .Steam and water gross b.t.u.224,000-net 168,000 Which i could never figure out, these units have a s-30 unit which means it will push 30 pounds per hour. If you take 30 pounds per hour and multiply it by 13,000 b.t.u. per pound it adds up to 390,000 b.t.u. Why they are so underated i dont know, I can modify a 520 to produce as much as what they are claiming. Anyway 3 inch outlet, 2 inch return, recomended chimney size 8 by 12 inches, 7 gallon coil, and a one sixth horse motor. These units feed on a 90 degree angle thru a transfer box which in turn rotates the transmission at the end of the pot which rotates the pot to drop the ash. They also are a self cleaning unit as far as the fines go, there is a tumbler in the pot assembly which cleans the fines out automatically. Off the top of my headf i dont remember the pot size but it is only a few inhes bigger than the 520. There are aftermarket parts availabe thru MARKS SUPPLY or through me, i also make parts for these units as well as others.I currently have 5 - 700 units in the shop to be rebuilt.Hope this helps, any questions contact me and i will do what i can. THANX SCRAPPER.

Not all the info comes from You although alot did especially on all the changes that efm made over the years with these
units However I know and learned a lot from old Bob Mullen before I met you Bob has been fixing and servicing these efm since they came out Bob is in his early 80s and still doing the servicing on over 350 units today. So Yes a lot of info came from you which I believe you learned a lot from Bill which has been around for years as well I to learned a lot from him & got alot of EFM Specs. sheets from Him I don't forget what I have learned and from whom I learned from . I also do not forget all the Help and advise that I get from people . I Just wish that certain ones I helped & give advise to would not forget so easily on what I done for them as well over the Years .

Not to drift off topic, but I think we need to acknowledge all those who go way beyond the 'call to duty' on our forum.

All too often, many forget to say, thanks. It's like a brotherhood of 'Coal Junkies'. and part of the membership is extending any knowledge we have with as many new folks as we can. The old timers were, for the most part, good at educating those who would follow them. It's part of our history as a nation, and for many folks in PA, it's part of their heritage. The minds of the folks who invented the burners and related equipment were brilliant and the abilities of those who cast, crafted, machined, welded or manufactured these timeless creations were and still remain remarkable.

In today's world of 'RIGHT NOW' response, the guys and gals who rehabilitate 30-60 year old units for a renewed life deserve a hardy hand shake to thank them for preserving what was foremost in our society: our heritage.
Don't be afraid of a technology that may not understand, embrace it!

Hats off to 'coal berner', 'scrapper', and all the folks that make 'hand feeding' (AKA REAL MEN) and stoker fed burning (AKA 'Girlie MEN') very interesting, informative and sharing the history of NEPA as they know it.

I am starting my 38th season of burning anthracite and I was unaware of any group or forum for all the early years, so I also say thanks to Richard and friends for making this all possible, .............north to Alaska or anywhere on the planet for that matter.

The history and realities of coal are best enjoyed by being there and I would especially like to thank Jay for another bit of 'History of Coal Lesson' when I visited the area a couple of weeks ago. These gentlemen forget more than even us crusty old veterans will ever know.

I'm officially a member of the '2000 Ton Club' with this weeks delivery. All burned by myself in hand feds,but mostly in stokers. since 1972. That would be 400,000 gallons of oil I chose not to burn, so gets the specs and history on all the coal burning equipment, and when really thirsty for knowledge, look at the commercial applications and the millions of tons that helped shape our country and the world, from the bridges you drive over, the vehicles you drive to the sand blasting medium you refurb you stoves and boiler's with.
Don't overlook the 'scars' left behind in coal country on our country's journey to where we are today, but be thankful we are successful as a nation.

Don't forget to 'VOTE' you choice on Tuesday......

Well said, thanks. I cannot say enough about how much JC (coalberner) has done for me and many other members here.

Here, Here !

Coal Burner, Thanks for the very informative post. Just what I was looking for. The link is of great help too.

To all that have responded I'd like to say that I've been on this site for over four years now and that without a doubt I probably would not have made it this far in my coal burning pursuit without the tremendous amount of enthusiastic help I have received over the years.

A lot of knowledge is here and I applaud all who are willing to help persons like myself.

I look forward to our heating season together.

Townsend