Looking on amazon it looks like i can get decent filter for $30-60 but then i see "350 cfm" does this mean you need to have a fan with 350 cfms to properly work the filter, im at 160... Thanks!
that $22 fan is most likely a duct booster, worthless if it encounters almost any resistance, so they suck(in the bad way) with carbon filters.(trust me, i wasted $60 on booster fans before i learned that) the $50 is most likely a can fan. Yes, that number is the advised cfm of the fan it be used with.
The carbon needs the right amount of time with the air to scrub it properly. The higher CFM filter is probably much bigger with more carbon to provide it enough surface area to scrub that higher amount of air.
You're the man this is what i've been searching for, would you reccomend getting the 4? I've got 6 inch hook ups but if the only difference is the size of the flange and not power im goin to spend 50 not 90 lol