I'm going to reply to myself for list archive purposes.

I have discovered that numerous companies make such a beast.....  They 
are actually typically used for dust collection purposes in a wood 
shop..... or sometimes used for exhaust from laser engraving/cutting 
machines...
One example is at 
http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber=94029

-forrest

> Forrest Christian wrote:
>   
>> So, I'm putting in (finally) a new-to-me wave solder machine.   It has a 
>> 4" duct attachment, and the manual indicates that some sort of exhaust 
>> fan capable of 400CFM needs to be attached.
>>
>> I'm having a bit of an issue finding the source for such a beast.  I was 
>> hoping to find something >400CFM already in a 4" duct (even though 4" is 
>> a bit small for 400CFM), but no luck.
>>
>> I know some on the list have either a wave machine or other production 
>> equipment with similar (or more aggressive) ventilation 
>> requirements.....  so I was wondering if anyone could provide me some 
>> insight into how to pump this stuff outdoors...   I think I get to pump 
>> this out through a hole in one of the garage doors in the new shop, so 
>> smaller hole is probably better....
>>
>> -forrest
>>     

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