How do Heat Exhangers work in the Harman Accentra 52i-TC?

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techfranz

Member
Feb 9, 2016
16
Lancaster, PA
So I cleaned my Harman Insert the first time. I am curious to why the removable Accordion panels are called Heat Exchangers? There appear to be combustion products on both sides. Do the Panels and medallion somebow Super Heat the exhaust air or is there a fresh air exchange I am not seeing?

It appears like the exchangers and medallion are just some very sturdy baffles, not necessarily heat exchangers.

What am I missing?
 
Exactly what Mt Bob said….the air being heated is behind the accordion metal
 
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