Closer grow; need help with venting/filter

[Darkgan]

Hey folks.

I've got a closet I'm converting to my grow room. It's three feet wide by three feet long, by eight feet high. My plan is to have the carbon filter exhaust through a vent I will install via the door. A couple of questions, though. I'm fairly noob at all of this.

1: Is there any way to install the vent to the door, in such a manner that I can open the door without having a hassle? (Having the ducting fall down, etc). I was thinking two different possibilities for this.

The first is that I would cut the vent sized hole out of the door, but then have the vent itself attached to the door frame. I'm somewhat new to this, though, and I have no idea if this is a possibility (Or a good idea).

The second idea I had was to have the ducting simply extend WITH the door. I would be using flexible insulated vent ducting, but I still don't know if that would work or not.

2: In a 3 x 3 x 8 room, would 150ish filtered CFM work? I was thinking I'd get a 6" can MAX fan, and a can 33 filter. I'd set the MAX fan on it's medium setting, which should draw around ~150 filtered CFM. I know this is a bit overkill for such a small space, but given it's the same price for a 4" HO can fan, I'd rather get the larger one and set it to a lower setting (To avoid exceeding the 200 CFM max on the can 33 filter.) Would this have any negative impact?

3: I plan to have the exhaust vent in the UPPER part of the door. The problem here is that I can't attach the filter/fan to the door itself. That said, would it be fine to have a setup like this:

FILTER -> FAN PULLING THROUGH FILTER -> AIR PUSHED THROUGH 3-5 FEET OF DUCTING TO THE DOOR VENT.

4: Will I need a vent for passive (Negative pressure) intake on the bottom of the door? There is a small crack in the bottom of the door, but it's not very large. Maybe a centimeter or so. What are some alternatives to a vent, if indeed I do need more intake? It would look a bit silly to have two vents on ONE door, and might draw suspicion.

5: The closet connects to my main room, and people are sometimes in there. Would a carbon filter exhaust like the above, combined with an ONA dispenser spray set to 30 minute intervals, take care of all smell issues? I plan on running 2-4 plants. Strains: White Russian by Serious Seeds, and C99 BX1 by Mosca Seeds

6: Are can-fan's indeed the best choice of inline? I know they're a fantastic choice for carbon filters, but I haven't heard much about the fans themselves.

7: Do inline fans pose any fire risks? I plan to attach it to a surge protector, if that makes any difference.

Thank you so much for your help. <3 my fellow stoners and growers.

 

[Darkgan]

Oh man. Title was supposed to say CLOSET grow. Clearly I was too stoned.

 

[SmokinErb]

1. 2nd option is probably your best bet. Try placing it as close to the hinged side as possible so it won't move very far.

2. 3x3x8 = 72 cu fr * 5(air exchanges per minute) = 360 CFM needed. However, I think they number may have to do with your lighting as well. If you're using CFL's/T5's I'm sure the 150 CFM would work. A lot of it has to do with your temps.

3. What's the question? Sounds like it'd work. Make sure you hang the filter to the studs in the ceiling rather than just the drywall unless you want the filter to come crashing down on some expensive equipment and precious cargo.

4. You need it. If It were up to me, I'd say draw the intake from the door, and cut a hole in the ceiling for your ventilation and vent up into the attic area. A hole in the ceiling isn't that hard to repair - google around and see if you feel like you're capable of repairing the drywall in the ceiling. Ideally you need 2x the passive intake as the exhaust size. I THINK the ideal amount of passive intake is 2x the amount of active exhaust.

5. Just make sure you're running your fan lower than the CFM rating than the filter and that should do it. The shouldn't even be necessary.

6. Can fan's are fine. Your friends in your room will likely be able to hear it however as they do put off some noise, as do all inline fans. If you're worried about stealth, I'd at least encourage a Whisperline or S&P. As for filters, you may want to look into Phresh filters. They work great and are extremely lightweight compared to Cans.

7. The fan should be fine to a surge protector. Check the rating for your surge protector and the wattage of the fan. Just don't run your lights on any type of extension cord.