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Posted by Harold hydronicnetwork.net on January 22, 2004 at 11:34:57:
In Reply to: Oil Burner Replacement posted by Mike on January 22, 2004 at 10:52:21:
It depends upon how old the burner is. For the past 30 years, burners can make a combustion efficiency over 85%. A tune-up with COMBUSTION TEST INSTRUMENTS will tell.