Who make the most fuel efficiency steam boiler?

Steamhead (in transit)

if two boilers have the same output but one has a lower input, that is the more-efficient one even if the AFUE ratings are the same.

Are you considering oil or gas firing? What boiler do you have now?

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johnnyge

I will like to find out what boiler maker has better fuel efficiency rate on steam boiler. The one that I have is 81.5% AFUE. Is anything better than that outthere?

johnnyge

I have now a New Yorker, gas firing boiler 140000 btu's, I need to check the output and imput information

Steamhead (in transit)

You shouldl find three BTU ratings on the plate:

Input, DOE Heating Capacity and Net. Also its rating in Square Feet. Post them here and we can help you.

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johnnyge

The information on the plate is:
Input 140,000BTU's
DOE Heat. Cap. 115,000BTU?hr
NET I=B=R rating
Steam 358 sq ft
Steam 86,000 BTU/hr
Gas supply Max 14in wc
Pressure Min 4.8in wc
manifold pressure 3.5 in wc
This is the info in the plate. Also this boiler is good for how many sqft of living space. I will like to find out if my boiler is not overside for my house? Thank you for the replies.

johnnyge

this boiler is ok or is anything more efficient out there

tom_117

steam

A few things you need to know about steam. First the size and number of radiators is what determins how many sq ft of house you can heat, and how well. If this is old construction and it has not been cut up It will most likely be prety good for the number and size of radiators. Your boiler must match the number of, and size of your radiators. To do this you need to add up SQ FT of radiators you have. This is called EDR. Your boiler is made to heat 358 sq ft of radiators. Google "Radiator edr values" or buy the book offered on this site. There are many other things that can cause your heat to be expensive. Do this calculation and you will be on the way to finding a cure. Also measure the length of the main pipe going from the boiler to the radiators. You need the length and diameter of your mains to figure the amount of venting needed to work correctly.

Stewy_2

I found this chart to be the best

This will help you identify your radiators and calculate the EDR

Dan C.

That is a cool chart. Where did you find that?

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Stewy_2

On Dunkirk's website

johnnyge

Stewy, thank you for the chart. It is helpfull and easy to understand.
I messure all the radiator in my house and the number that I got is 63,408 total BTUH Load. That means that the boiler that I have is overside for the house and will explain my high gas bills in the winter months.Any suggestions about what will be a good size boiler for my House? and thank you all for the previous replies.

johnnyge

I may add that the total number of radiators in the house are 11 radiator and with the chart add to 264.2 sqft of radiation and multiply to 240 coversion factor and thats is how i got the 63.408 total BTUH load.

Stewy_2

It doesn't seem grossly oversized

Unknown

The rating isn't what's important. The near-boiler-piping,insulation, properly sized & placed vents, ect is whats important. You can have a boiler with the highest rating in the land, but it won't mean squat if the other variables are not in place.

World Plumber

Have your gas pressure and meter clocked to determine your actual firing rate. Also what steam pressure are you running. High operating steam pressure will cost you. My boiler is much more oversized. I cost me a fortune the first two years. Till I started reading and learned that what I was being told by the old timers of the firm I was working for was wrong. Turned that steam pressure down and my gas bills came down.

johnnyge

Thank you for all your replies. My boiler is running at less than 1 PSI,I place a low gauge reading and runs a 14 onz.of pressure. What I may need to find out is the Firing rate as World plumber is suggesting. Can I do that myself? or a special tool meter is requiered?

black_gold

Lot's of good info here, but I'm not sure anyone really answered your first question. You ask for a fuel effecient steam boiler, so I'm assuming you mean oil. I don't like to discuss my brand preferences on this website, due to the rampid bashing that occurs here, but I think the Megasteam is the most effecient steamer out there. I have a pretty good rep in my neighborhood, so I put a few in a few years ago. Corrected for degree days they are all down 25+% on gallons. I've got a few EC's and ECT's out there, and they're a nice boiler too, but they don't run anywhere near as nice as the megasteam.

johnnyge

Actually I am interested in a gas fired boiler as long is more efficient that the one that is now installed in my house.

Charlie from wmass

H.B.Smith G8

I thing in gass they are the most efficient due to their wet base design, but with the power burner they can not run without electricity as some of the old steam units with powerpiles could. I can not find the actual A.F.U.E. ratings for them when fired on gas. Does anyone have the ratings?