I'm still trying to decide which way to go. It almost seems like the advantages for push/pull vs single fan vary depending on a number of factors.
Quote:
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Several fans were tested at 12 and 7V, both singly and in a push-pull configuration. Running the single Delta FFB0812EHE at 7V instead of 12V reduced the radiator capacity by 18%. Running two Panaflo FBA08A12 fans at 12V instead of one increased the heat dissipation by 17%, while running the two Panaflo fans at 7V produced no gain at all compared to the single fan at the same voltage.
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The same basic result seems to hold true. At low voltages/low cfm, 2 fans perform the same as a single fan. High CFM setups (2 deltas) at high voltages will out perform one -- possibly by reducing deadspot issues, but 2 low CFM fans will be the same as a single low CFM fan.
If that assumption is holding true, then the big benefit would be to get 2 high CFM fans and run them at ~9V (fanbus time again) to maximize cooling and minimize noise. Looks like the data curves should meet right around there.