Thread: 190 cfm Delta
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Unread 01-11-2003, 12:33 PM   #8
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Join Date: May 2002
Location: Texas, U.S.A.
Posts: 8,302

Ok, let's look at that fan again (the one in the first post):

It's rated for 12 Vdc (7.0 to 13.2), 1.45 amps, turns at 4'000 rpms and...

will deliver a max flow of 150 cfm, and deadhead at 0.489 in H2O.

At .25" H20, it'll do almost 120 cfm. It will however, hit a noise level of 56.4 dBa.

That being said... I believe that 4 * 60mm fans should make less noise, but I think that we're still debating that one... I plan to test with 9 * 40 mm fans (when I have time), maybe it'll clear up the issue... Either way, a blower (squirrel cage type fan) is quieter, but can be hard to find. It is however, a common car part...
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