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    Jack Cobb's Avatar
    Jack Cobb Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Jan 13, 2010, 07:10 PM
    Delco heat boiler
    I have a Delco boiler which is quite old. 120,000BTU. Model GB135LP or GB35LP. Serial # 1446. Service 5082793. How old is this unit and what would be the estimated efficiency? I'm thinking about replacing with a high efficiency by the end of this year to take advantage of the 30% Federal rebate. The boiler still seems to work fine. Thanks for any info. Jack Cobb

    Jack Cobb
    builderbob1's Avatar
    builderbob1 Posts: 41, Reputation: 2
    Junior Member
    		  
    #2

    Jan 14, 2010, 01:26 AM

    The efficiency is about 60%. New ones are from 80% to 95% and have pumps on the water system which circulates your water faster. Don't be alarmed if the new unit is twice as small as the old one.






























    5 to 95%
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