You can suck, or blow when it comes to filters... Or space balls. I may consider moving my filter out of my room once I add an AC unit, its the easiest way I can see to plumb the lights and AC exhaust together. Or I need a 2 hose portable. OR I'll just mount a wall unit. The beauty of keeping my veg cab in the room is that I can put an AC behind it and the wife won't really see it... Cuz I'm not telling her when I buy it of course! She doesn't look too far into the room, although she does look deep into the electric bill!
Just to share with anyone who's curious. My grow costs $63 a month (.18 per kwh, 5th tier) in full operation. That's 4 fans, 600 watt light on 12 hours a day and a 130 watt led on 18 hours a day. Random tidbit