Intake filter placement?

I've been growing a number of years, but my next one will be the first time using an intake filter. I'll be using a Phresh 6x12 with a 440 CFM inline fan. Ambient temps will be about 50-65F at the air source.

What's the best way to set up the intake? Should I rest it on the floor of my garage, outside the tent near my outside air vent? Position it next to the hole, or keep it straight IMG_1166.JPG inline with the ducting to the tent? I'm not sure as before I would hook up ducting right into a window, but the filter is bulky and doesn't seem like that's an option.
 
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