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Posted by Heatpro on December 21, 2005 at 21:07:18:
In Reply to: Re: My old Boiler...again... posted by Michael on December 21, 2005 at 20:03:12:
Joe has a good handle on which boilers are good. We disagree on the point that your boiler could be 60% efficient; it is too easy to have it be higher. An oil burner is a controlled-combustion device that has a combustion efficiency equal to what it is when it is tested with combustion instruments. Someone would have to make it that low on efficiency on purpose by avoiding combustion test instruments. If your burner is modern, and I would be willing to assume that it is not the original burner, it should be able to make 10.5% CO2 which is a sign of reasonable efficiency. If the boiler is totally uninsulated and way oversized, then a new boiler would be worth an investment in lower losses.
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