SidecarFlip wrote:
That is a good presentation for sure. Now I know why my +90 condensing furnace (in out house running on propane) makes so much water and why the exhaust develops a lot of ice around it in the winter time...all water. I was considering a Wave heater for my next unit. Reading that, I think I'll stick to a forced air unit and deal with the amp draw.
and these furnaces get quite a bit of extra efficiency and heat out of condensing water from vapor to liquid. water releases a great deal of heat when it goes from a vapor state to a liquid. Conversly it takes a great deal of energy to get water from a liquid to vapor, notice how water will sit near boiling for quite a while before coming to a full boil.