[Amps] colling air per minute ??

[Roger]

> 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.

73

Roger (K8RI)


> 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.
>
> 73,
>
> George T. Daughters, K6GT
>
>
>
>
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