filter set-up

hi folks, im needing some help in setting up my filter. what is the best way to set it up ? as i cant find any desent pics to go by anywhere.
1, filter inside grow room connected to ducting then the fan.
2, fan inside room attached to duct then the filter.
3, duct from room onto the fan and connected directly onto filter.

everyones advice would be greatfully received.
o2

anybody got any ideas ? i want it to be as efficient as possible

o2

This is how I did mine mate....

This is all inside my grow room and gets vented out through an exhaust. It is very effective for both ventilation and odour control. I use a passive vent at the bottom of the room for my intake.

Hope this helps....good luck!

thanx snowwhite, your picture is a great help mate, im going to do something very similar to your's.
thanx again
o2