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Tim
Tim asked in Home & GardenMaintenance & Repairs · 1 decade ago

How do I know the efficiency of my boiler?

I have a Weil McClain Boiler. It is at least 25 years old, but it is not "ancient"

I am wondering what the efficiency is.

I can see from a panel in the boiler that is has 175,000 btu in and 138,000 BTU out.

Can I simply divide 138/175 to get efficiency?

1 Answer

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  • Anonymous
    1 decade ago
    Favorite Answer

    If it has a large stack (6-7-8') its around 75%.Only sure way is with combustion instrument's.Replacing with a condensening boiler is a good idea.

    Source(s): W.M.dealer
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