Exhaust Fan for Powder

You will probably need a dust collection system, which will require careful analysis by a professional that specializes in this area....

http://www.powermag.com/collecting-dust/

Sounds like you need to hire an engineer.

Have you ever heard of a 'dust explosion'?

You need an expert to guide you.

He'll need to know much more than you give here.

Volume of room, density or the FLAMMABLE dust, turnover needed, local codes on corn starch pollution, etc.

Thanks to all

Starch is almost impossible to get off a car, I speak from experience.

I have seen dust / powder collections using a down draft which were easier to install and (arguably) as effective.
(personally I still believed dust was every were.) Is it easier when getting assistance from gravity?

When using powder to offset (myself) I found it far cleaner and easier to remove all
the powder equipment and use an infra red lamp(s) placed in close proximity
to the sheets on exit. (spacing and proximity depending on inks sheets speed etc.)

Unless you are using very slow inks, it only takes a second of heat from the lamp(s)
to remove all the offset. I made one up using an old, free standing, reading lamp
stand and was "sold" on using this instead of powder ever since. Very cost effective.
No mess, no dust, explosion risk, or breathing/health problems! (Worked for me.)

Mine was a manually switched on/off, but if you are happy with the result (no set off)
I would recommend an on/off switch linked to the machine. With no sheet output the
lamp(s) naturally could cause a fire if not switched off.

jt.

A guy walks into a post office one day to see a middle-aged, balding man standing at the counter
methodically placing "Love" stamps on bright pink envelopes with hearts all over them.

He then takes out a perfume bottle and starts spraying scent all over them.

His curiosity getting the better of him, he goes up to the balding man and asks him, "what is he doing?"

The man says "I'm sending out 1,000 Valentine cards signed, 'Guess who?'"

"But why?" asks the man. "I'm a divorce lawyer," the man replies.

Water washing is a useful way of trapping dust.

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