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Re: High Efficiency Boiler for Hydronic Heat


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Posted by HeatPro on April 20, 2008 at 17:06:57:

In Reply to: Re: High Efficiency Boiler for Hydronic Heat posted by Steve R. on April 20, 2008 at 16:37:23:

The AFUE efficiency of condensing boilers drops as the temperatures of the water rise above 150F as they go out of condensing mode. A way to get the full efficiency is to have twice the usual baseboard - in other words - design the radiation so it is enough to give off the maximum required room heat at 140F. Then the boiler remains in condensing mode as with floor slab heat.


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