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Annuel Fuel Utilization Efficiency (AFUE) Rating for New Boiler

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Jeff_H
Jeff_H Member Posts: 37
I am thinking of converting from oil to gas heating. A Burnham IN6 gas boiler with a BTU rating of 175,000 and and AFUE rating of 82% was recommended. Does 82% seem too low? Does anyone have thouhts on the Burnham IN6 (assuming that it is corectly sized)?

Thanks!

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  • Bob Bona_4
    Bob Bona_4 Member Posts: 2,083
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    Steam or hot water heat?
  • SWEI
    SWEI Member Posts: 7,356
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    How was the sizing determined? What are your fuel costs like?
  • nicholas bonham-carter
    nicholas bonham-carter Member Posts: 8,576
    edited April 2015
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    Remember that the most efficient boiler, when sized, and piped improperly, will waste fuel, and deliver discomfort.
    Why not send us some pictures of your present boiler, so we can see if a gas burner could be installed.--NBC
  • Jason_13
    Jason_13 Member Posts: 304
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    It must be steam as that is the only way an IN6 is sold. Since it is steam you are very limited in your efficiency as you do not have the option of high efficiency the water boilers offer.
  • Steamhead
    Steamhead Member Posts: 16,838
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    You can do better than that Burnham. A wet-base power-burner steam boiler can reach 84% or 85% on gas. Look at the Slant/Fin Intrepid, for example- normally sold with an oil burner, but is approve for use with power gas burners.
    All Steamed Up, Inc.
    Towson, MD, USA
    Steam, Vapor & Hot-Water Heating Specialists
    Oil & Gas Burner Service
    Consulting
    vaporvac
  • Robert O'Brien
    Robert O'Brien Member Posts: 3,541
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    If he is in Nat Grid service area,the Burnham/Nat Grid deal makes it cost prohibitive to use anything but a Burnham,at least for steam.
    To learn more about this professional, click here to visit their ad in Find A Contractor.
  • ChrisJ
    ChrisJ Member Posts: 15,680
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    Steamhead said:

    You can do better than that Burnham. A wet-base power-burner steam boiler can reach 84% or 85% on gas. Look at the Slant/Fin Intrepid, for example- normally sold with an oil burner, but is approve for use with power gas burners.

    @Steamhead, have you measured how much electric a power burner consumes? We brought this up in another discussion but I don't think you were part of it, not sure.

    I'm curious on the total cost to run a 85% boiler plus powerburner vs an 82% or 83% natural draft.

    Also, is it possible to pipe a barometric damper to pull air from outside rather than the area around the boiler and if so, would it be beneficial?


    @Jeff_H
    As others have said, sizing that boiler properly is extremely important. You can either have a practically silent and very efficiency and comfortable steam system with a properly sized boiler, or have it sound like you're in a factory with an oversized one. Once you confirm the size is correct the next step will be to make sure it gets piped properly, this is just as important.
    Single pipe quasi-vapor system. Typical operating pressure 0.14 - 0.43 oz. EcoSteam ES-20 Advanced Control for Residential Steam boilers. Rectorseal Steamaster water treatment
  • Jeff_H
    Jeff_H Member Posts: 37
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    Thank you all. I currently have a steam system. I've attached some pictures of my current boiler (a Burnham V75). The person who recommended this did measure each radiator in my house. I did not ask what EDR rating he came up with.
  • Bob Bona_4
    Bob Bona_4 Member Posts: 2,083
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    The IN6 should serve you well. Surprised the V7 has lasted this long. 
  • Jeff_H
    Jeff_H Member Posts: 37
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    Thnak you. I ead a lot about over-sized and undersized-boilers, as well as AFUE ratings. Also, part of the rationale behind converting to gas is that my boiler is very old (I believe that it had not been made in over 20 years) and this would be a good time to start anew (before my boiler goes)
  • Marz
    Marz Member Posts: 90
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    A Burnham Megasteam by oil would look perfect in there.
  • Fred
    Fred Member Posts: 8,542
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    Marz said:

    A Burnham Megasteam by oil would look perfect in there.

    Megasteam is a great boiler but not going to be as economical to operate as a Natural Gas boiler.
  • Marz
    Marz Member Posts: 90
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    Some will always disagree with that statement Fred. :)
  • BobC
    BobC Member Posts: 5,478
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    Some have converted the megasteam to gas with good resulys but there are issues with warranties and insurance because Burnham does not want to certify the boiler for use with gas.

    Bob
    Smith G8-3 with EZ Gas @ 90,000 BTU, Single pipe steam
    Vaporstat with a 12oz cut-out and 4oz cut-in
    3PSI gauge
  • Fred
    Fred Member Posts: 8,542
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    Marz said:

    Some will always disagree with that statement Fred. :)

    As has been demonstrated, repeatedly, some will always disagree with every statement. :) Shouldn't stop anyone from expressing their viewpoint though. Unless they are doing so just to hear themselves.
  • vaporvac
    vaporvac Member Posts: 1,520
    edited April 2015
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    I'm thinking @fred isn't saying the MST isn't the most efficient (and probably best) boiler out there, just with NG so much cheaper than oil, the cost to run even an atmospheric is probably less.
    The electricity needed to run a power burner on the Slantfin Intrepid is marginal. I'm extremely happy with my choice and for once, I could be warm this winter without breaking the bank.
    Two-pipe Trane vaporvacuum system; 1466 edr
    Twinned, staged Slantfin TR50s piped into 4" header with Riello G400 burners; 240K lead, 200K lag Btus. Controlled by Taco Relay and Honeywell RTH6580WF
    MarkS
  • Fred
    Fred Member Posts: 8,542
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    vaporvac said:

    I'm thinking @fred isn't saying the MST isn't the most efficient (and probably best) boiler out there, just with NG so much cheaper than oil, the cost to run even an atmospheric is probably less.

    Yes, Sorry if I wasn't clear.
  • Marz
    Marz Member Posts: 90
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    I got it. But i will say i would rather clean up a mess, than lose my house and possibly worse. As is demonstrated time and time again.
  • vaporvac
    vaporvac Member Posts: 1,520
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    I think we all were typing at the same time! What are you saying, @Marz?
    Two-pipe Trane vaporvacuum system; 1466 edr
    Twinned, staged Slantfin TR50s piped into 4" header with Riello G400 burners; 240K lead, 200K lag Btus. Controlled by Taco Relay and Honeywell RTH6580WF
  • Fred
    Fred Member Posts: 8,542
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    vaporvac said:

    I think we all were typing at the same time! What are you saying, @Marz?

    It sounds like @Marz is saying he feels oil is safer than natural gas, maybe based on the number of gas explosions we've seen on the news lately??? IMO gas is as safe as any other fuel if properly installed and maintained. Any heating appliance requires the property owner to be vigilant about checking the system and safety devices and proper maintainence.
  • ChrisJ
    ChrisJ Member Posts: 15,680
    edited April 2015
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    Natural gas has been used in homes for well over 100 years with very few problems.

    Compare the amount of explosions from natural gas to electrical fires over the past 100 years.

    If you're afraid of gas I hope you don't have electrical service in your home.

    Single pipe quasi-vapor system. Typical operating pressure 0.14 - 0.43 oz. EcoSteam ES-20 Advanced Control for Residential Steam boilers. Rectorseal Steamaster water treatment
    Canucker
  • JStar
    JStar Member Posts: 2,752
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    We send a lot of Burnham IN's to the junkyard with leaking/rotting sections. Until Burham addresses their casting issues, I would not use them.
  • Jeff_H
    Jeff_H Member Posts: 37
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    JStar - What boilers have you had good experience with?
  • Charlie from wmass
    Charlie from wmass Member Posts: 4,322
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    I think the in gets a bad rap because every knuckle head who gets on the utility companies installer list uses them. I have had good luck with Burnham warranty on the boilers. Just notice most leaking blocks could be on the wall of shame.
    Cost is what you spend , value is what you get.

    cell # 413-841-6726
    https://heatinghelp.com/find-a-contractor/detail/charles-garrity-plumbing-and-heating