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When do you replace a gas fired hydronics system?

Al Nardizzi
Al Nardizzi Member Posts: 17
System is gas fired,2 zone,with baseboard radiators..it's about 33 years old....no real problems. What is expected life for this system..it's an Electro Therm unit.



  • Pat Clark
    Pat Clark Member Posts: 187
    boiler life

    We see on average about 20 to 30 years for the life of a boiler here (Anchorage, AK). A lot depends on how well maintained it is. Less maintenance, shorter life. The newer boilers at 80% and more efficiency can usually repay for the replacement in 5 to 10 years based on cost of fuel.

    A study done by ASHRAE several years ago show cast iron boiler Service Life at 30 Years, Furnaces at 18 Years.


    Bell Plumbing & Heating
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