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wasted energy ?

630 Views 4 Replies 4 Participants Last post by  Fix'n it
i have owned 2 furnaces. i have noticed they both do this. but it seems a waste of energy.
www.youtube.com/watch?v=S8AI8VZQ-ts
look in between the round parts of the burner at 1:30
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the exhaust from the crossovers gets pulled into the heat exchanger tubes. not a waste.

now if it changes when the fan comes on, there's a problem.
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