Dead zone impact on radiators

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Originally Posted by Snyxxx

I think this picture from eva2000 best shows the fan dead spot on a rad.

http://i4memory.com/reviewimages/coo...adBox_025.html

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You're forgetting that centrifugal force acts on the dust particles. They are more dense that air, and will be pulled towards the outside edge. How big is that effect? ...who knows? who cares?