Apptech wrote:
> 400 CFM into about 0.1 0.1 foot^2 = 4000 fpm at no 
> compression or about 65 fps or 45 mph. Even with some 
> compression that's "quite a gale". 
> That seems to be an immense amount of air for ventilation 
> alone. Is there perhaps a factor of 10 or even 60 (cfh) 
> involved?

The specs for the current version of this machine spec 300CFM or 
500m3/h.    The Manual says "Use a 400CFM (150m3/h) exhaust fan to 
remove fumes beyond the working area" - which is obviously in error 
(either the m3/h or the cfm number is off).

Knowing what I know about the amount of fumes produced by the wave 
solder process (dipping a board coated with flux into hot solder wave), 
3-400CFM does not seem excessive as far as the volume of air needed to 
move the fumes outside.

However, the 4" hole provided seems rather small for this application.

-forrest
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