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Posted by HeatPro on August 12, 2005 at 10:11:48:
In Reply to: Boiler rateting posted by Leo on August 11, 2005 at 21:32:11:
Boiler ratings are done by GAMA and are at the gamanet.org site. It doesn't matter much any more about boiler ratings as all of them must be over 80% AFUE efficienct by law, most produced are over 84% AFUE and some are over 90%AFUE. that isn't much of a range to compare. There are no reliability ratings as most boilers last over 30 years and some are still going after a century. The only unreliable parts in comparison are the electronic ignitions, and the are generally the same throughout the boiler and ducted heat industry. What can happen to a vessel made of metal holding water? That is all a boiler does; it is the controls and pumps that are the weakest point and they last a long time. What makes a boiler fail early is an installer that leaves leaks so make-up water comes in with oxygen to corrode the metal. A system with the feed water off so you can discover leaks can last longer than you.
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