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Posted by jeffrey on January 10, 2005 at 18:05:32:
In Reply to: Re: New Boiler Choice posted by jeffrey on January 10, 2005 at 17:56:04:
: : If you indeed don't have a liner, then you don't want a new boiler in there at all. The instructions that come with it say to use it in a lined chimney according to the NFPA guidelines.
: : Now if you mean that your chimney was built with a terra-cotta inner liner as chimneys had to be built for the past 50 years, then the important point is that you would do better to add another stainless liner to the chimney inside that to make it the right internal cross-section to give the best draft to the chimney and to prevent condensation. As just about every oil boiler made can achieve 85% or better AFUE, a new boiler is close to the line of making water run down the inside to corrode mortar if you don't take care.
: : It is best to pick an installer that understands this, as he is more likely closer to understanding what needs to be done.
: ok - sorry for not being clearer in my question - we have a terra-cotta inner liner in our chimney. When I spoke to the contractor about condensation concern I was told that this is more of an issue with a natural gas boiler as opposed to an oil burner - which is what we will be using. I was told that the temperature on the oil system is much higher and minimizes this concern in our application. I also am still trying to choose between the Buderus boiler and the Croen Freeport boiler (which I have now learned is alos cast in Germany). Any thoughts?
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