Fan / Filter blow coupler

For those who wish to experiment with developing a filter scrubber (http://www.thingiverse.com/thing:125264) in a "blow air through the filter" configuration. Obviously you will need to design your own fan-to-case coupler if you are going to mount this external to a case. The model design files are included to give you a running start...

*This will **not work** with the above-mentioned air scrubber.* It will work - though much less efficiently than that design - in a recirculating scrubber mo