Are not most of these thin cores aluminum? That has problems of it's own. BIP of course has all copper, but I"m refering to the heater cores. This seems less desirable.
And won't the BIP have a much higher head loss rate for the water side? It would seem to trade better air flow for lower water flow rates.
Would not a exterior rad box to contain a core like the large 2-192 core, which is still copper/brass and with a finned area of 10.75 X 10.25 X 2 also serve for low noise very well? I'll grant that it's not a single pass design, but with 11 tubes flowing each way should not be very restrictive.
Pretty clear I've missed some good debates prior to this on the advantages of thin cores. I did some searching but didn't find much. Links?
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