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Efficiency Rating

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K-Man_2
K-Man_2 Member Posts: 1
in Gas Heating
I'm in Providence, RI

I have a friend who wants to install a gas boiler. What should be the minimum efficiency percentage(s) (Full load and Low Load) he should require for a new boiler? I have a contractor who wants to install at 80% Full Load efficiency. That seems low to me for a new boiler.

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  • Tim McElwain
    Tim McElwain Member Posts: 4,625
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    No matter whether in RI

    or anywhere else most boilers in the mid efficiency category are  going to give between 78% to around 84%. The Burnham ES2 can give about 85% and is not a condensing boiler but can have add ons to increase overall boiler/system efficiency with out getting into the Modulating/Condensing boiler side.
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