laser air handler

[sthole]

we have a mazak super turbo-x laser and the techs who have came here tell us our air handler for that unit sucks (or in realitiy doesn't suck as well as needed). that unit is a model DC-30D-NR by Yamazaki Mazak Optonics Corp.

the teck tells us we need 250 cfm at 7.5" of water pressure.

any thoughts on this, any one else use this unit, any suggestions if we do need to replace the fan/blower what we should use and where we can purchase.

thanks for all and any help!