> On 10 Jul 2007 at 17:43, D Pipes wrote:
>> OK I KNOW someone here has this answer.
>> I was read a spec on cooling fans one fan states its air flo as such:
>> Delivers 32 ft of colling air per minute
>> How does that convert compare to CFM??
> I suspect that it DOES mean CFM. It was probably written by some
However when cooling tubes you *also* need to know the back pressure at
which the fan delivers the rated, or required pressure.
Given a tube that might need 15 cfm @ 0.3" of water pressure or one that
takes 20 CFM at 0.1". The first would take a squirrel cage blower of the
proper size and speed while the second could probably be handled well by a
plain old muffin fan much like the old PL172/8295A.
> clueless marketing type (not ALL marketing types are clueless) who
> doesn't know the appropriate units. Like you hear "1000 pounds of
> pressure" and the like.
> George T. Daughters, K6GT
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