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Posted by HeatPro on April 29, 2008 at 15:23:38:
In Reply to: Re: Toreplace or not posted by Jeff on April 29, 2008 at 09:55:35:
: Mine is not a cast iron oil boiler. It is a typical single pass boiler. I found out that the 86% is just the burner rating, and not the actual furnace.
++ The burner efficiency is determined by knowing the input and the outlet temperature. The AFUE efficiency won't be much lower. I am sure Benjamin wouldn't be in business if it had an oil boiler that threw away 40 to 60% of its oil burner efficiency.
http://mainewoodfurnaces.com/CC500.shtml
"Because of this innovative design, the OB1000 has gained Energy Star ratings that place it near the top of the pack. With a Riello burner running on a Balanced Flue system it is rated with an 87.8% efficiency!"