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Boiler over sized

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Dave_4
Dave_4 Member Posts: 1,405
in THE MAIN WALL
Having an oversized boiler mostly means the boiler will cycle more often than optimal, providing a less efficient performance. With the proper controls the boiler should be able to provide the required heat and I doubt any savings on efficiency with a properly sized boiler would make up for the cost of replacing the oversized one.

I would do the heat loss calcs myself and don't rely on the amount of EDR installed.

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  • joe_89
    joe_89 Member Posts: 1
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    boiler over sized

    What if anything can i due to a one pipe steam system work more effiently, that has a boiler 2 times bigger then what i needed. Its a 3 yr old gas burnham.
  • Matt Undy
    Matt Undy Member Posts: 256
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    How did you determine the boiler is oversized? Did you calculate the EDR of your radiation and compare it to the rating of the boiler?

    The boiler can sometimes be underfired somewhat, but not by 50%. Uninsulated pipes would increase the amount of steam the system consumes but could cause other problems.

    Matt
  • joe jr.
    joe jr. Member Posts: 16
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    boiler over sized

    I had a someone come in and he measured all my radiators,and determined i would have been good with a boiler that puts out 85,000 btu's instead of mine that is rated for 175,000. Thanks
  • Paul_11
    Paul_11 Member Posts: 210
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    not big enough to care

    With either boiler,you have a very small boiler. As long as it is piped and vented correctly, I would not worry about it.
    Are you having some kind of problem?

    Respectfully,

    Paul B. Shay
    pshay@arealgoodplumber.com
    LMP 1307
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  • Ross_7
    Ross_7 Member Posts: 577
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    oversized

    If the person calculated the correct EDR, even if is piped correctly, it is still oversized for the load. It is still a problem, and, should be addressed. How's the venting situation?
    Ross
  • Plumb Bob
    Plumb Bob Member Posts: 97
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    > Having an oversized boiler mostly means the

    > boiler will cycle more often than optimal,

    > providing a less efficient performance. With the

    > proper controls the boiler should be able to

    > provide the required heat and I doubt any savings

    > on efficiency with a properly sized boiler would

    > make up for the cost of replacing the oversized

    > one.

    >

    > I would do the heat loss calcs myself and

    > don't rely on the amount of EDR installed.



  • Mitch_6
    Mitch_6 Member Posts: 549
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    Contact the manufacturer

    I have seen (but not actually done myself) several occasions that one or two logs were removed.

    You must have the blessing in writing from the manufacturer to do this and should do a complete combustion test both before and after.

    Mitch S.

    To Learn More About This Professional, Click Here to Visit Their Ad in "Find A Professional"
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