nikhsub - that wasn't the answer to the question I asked you. I've SEEN sales figures of singlepass rads vs regular rads, and the singlepass rads aren't moving. Justifiable means I need more than "hmmm, a bit better"... To get it passed management and the thousands of pounds of outlay to put into production, I need hard factual or hard theoretically confirmed info... Cathar produced all the theory etc and groundwork for the PA160, hence getting it into production wasn't a difficult task... financially, it's still a risk, but much less of a risk... If you can point me to info that would allow me to justify it to those that it needs justifying to, I can see what I can do... don't forget peoples' wages are at stake...
Pulling air thru a rad is always better, no matter what the rad, due to the nature of the fan and it's airflow profile (I think!)... so, side without shroud wants to be against a rectangular hole in front or top of case... with shroud and fan mounted on the opposite face pulling air into the case thru the core.
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