Well it's all inside of a wood box for one thing. If you use a bathroom fan (fart fan) mount them as normal and add a power cord. You need a space between the air-in of the fart fan and the filters (about 6-8") that will create a vortex type of air flow where you will use a larger surface area of the filter and prolong it's life. IF you are installing it in the roof then just build the box in the roof. The rest is the same you can vent it outside or bring the scrubber air back into the room.

Make sense?