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Flue temp and return water temp. condensing?
I have basic understanding of this condensing process and efficiency.
My question is, what temp difference (on average) should I see between the return water and flue gas?
I'm currently running around a 10* return water temp drop, but my flue temp is 1* higher to about the same at the end of the cycle than return water. I usally have water dripping out of the condensation drain.
I know I need to get a lower return water temp (10* more). When I fix this, I should have a 10* difference in my flue temp?
I'm trying to educate myself.
Any info would be helpful.