Info on old boiler?

S Ebels

It ate 100 cu. ft. in 5 minutes and 31 seconds. Sounds like a little under 1200 cu.ft/hr or around 1.15 million btu's. We measured up the whole building for a heat loss calc and got dimensions/lengths on all the BB and cabinet style convectors.

After looking it all over and feeling the building temp with the heating system turned off and an O/D temp of 46*, I can safely say that they have way more capacity than needed. Not only in firing rate but also total radiation available. Sounds like an excellent candidate for some condensing equipment.

S Ebels

Info on old boiler?

Ran across an old boiler that's slated for possible replacement and I'm doing some checking to see what the spec's are on the old dog.

It's a firetube, hot water, atmospheric, natural gas type monstrosity made by the Hapman (Harman?)-Dutton Company, Dutton boiler division. No btu rating plate but it says 322 sq ft. on the data tag. Installed in 1957, same year as me. Guess that makes me an old dog too.Serial # is 041287 and it has a 22" flue pipe coming off the back which dumps into a 30' tall 28"x32" chimney.

Any info that you have would be appreciated. Btu input, etc?
I'm going to do a heat loss on the building which used to be a hospital and is now the municipal building in a small city up here. I'd really like to see what the building actually needs compared to what this thing eats.

The old beastie in the picture below is approximately 8-9' tall and about 7' front to back. The gray door in front is 42"x42" and is the access door for cleaning/servicing the tubes. Looks like a double pass gas design. (extra beans please, where's FfP with his Beano when you need him) Only got the one pic and the digital camera died on me.

Mark Eatherton1

The ol' H-D eh...

Rumor has it they changed their name to Harley-Davidson and moved to Milwaukee and started making Iron Horses...

Just yankin' your chain Steve. I haven't the faintest clue. Hopefully someone like Frank will pop in and save my bacon...

Sounds like a monster though. Whatcha thinkin' about replacing it with? Vitodens? Oughta nock the snot outa their fuel bill:-)

ME

Ed_26

old gas boiler

You could clock the meter (if possible?)to get cfh/btuhr.

Steamhead

In the Hydronic Rating Handbook

Dutton is listed as C.H. Dutton Co. of Kalamazoo, Michigan. This company made both horizontal and vertical steel tubular boilers. If this is a "monstrosity" then the 322 square feet rating probably refers to heat-transfer surface within the boiler.

Believe it or not, their gas models are rated in either BTU/hour input or in cubic feet input. If you can clock the meter and let me know if it's a vertical or horizontal boiler, and the model name if there is one, I should be able to get you the rating.

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loose cannon

Old Boiler Info

Do like Dan says and forget about that old monster, crank out a heat loss calc. on the house and size a replacement off that. That old beast is probably double what you need anyway!

Steamhead

That would give a grate area

of roughly 22-24 square feet, which would probably mean a rating of 70-85 HP or 9600-12000 square feet steam, or 15360-19200 square feet hot water, or a Net BTU rating of 2,304,000-2,880,000- assuming 150 BTU per square foot hot water and that my calcs are correct.

It will be interesting to see how this compares to the heat loss.

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