Forum Discussion
Sam_Spade
Nov 24, 2018Explorer
almcc wrote:
it gets the high efficiency by condensing the water out of the flue gas, comments about rusting in these furnaces are incorrect (bogus).
Close but not quite.
It gets the high efficiency by capturing most of the heat from the flue gasses with a more elaborate heat exchanger. A side effect of that is condensing out more moisture.
But you are essentially right.....about the combustion components which are stainless steel and won't rust.
The entire unit, however, is NOT rust proof and if the general environment gets really moist, so will the cabinet and other components outside of the combustion path. Hopefully none of them would rust to the point of failure though.
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