Air filters

[Boco2017]

I am looking for a smaller carbon filter or something similar but I seem to only be finding giant filters. I have about a 2x3x5 tent so I don't need anything to crazy but I have a bit of a smell starting and the temps keep creeping up so I'm wanting to add more airflow and a filter any suggestions for a smaller tent?

[RobM]

What size fan are you connecting it to? 100mm 150mm? (4inch or 6 inch i think)or are yiu wanting fan and filter?

[Boco2017]

I am looking and a whole set up. I was thinking a 4inch fan should be good.

[RobM]

Im going to get something like this for myself.. i have a 4x4x8

http://vi.raptor.ebaydesc.com/ws/eBayISAPI.dll?ViewItemDescV4&item=222248549350&category=178985&pm=1&ds=0&t=1509663745765&cspheader=1

im sure amazon woukd have something like that (100aud would be about 75 usd)

[NebulaHaze]

A 4" Inline Duct Fan with 4-inch Carbon Filter, 4" x 12" version (or similar products) connected by 4" light proof ducting and hanging from inside your tent would probably be more than enough for a tent that size. You may be able to find better prices by shopping around. Just make sure to get a real exhaust fan and not one of those crappy $20 metal "booster" duct fans. They claim to have high CFMs but in reality they are too underpowered to get the suction you need for a carbon filter to be effective, and they use a surprising amount of electricity compared to a real exhaust fan. It's important your grow space is sealed enough that you get some negative pressure from the fan being turned on, otherwise smells might still leak out.

[BlueBudz]

Hey Nebula, how to you know how much negative pressure is too much? I have a 175cfm 4” fan for a 4x4x6.5 tent with a 6” open intake and it seems like it’s gonna suck the whole tent in! Is this an issue for the plants respiratory system?

[NebulaHaze]

Sorry I didn't see this until now. As long as the plants aren't waving around from the wind you're good

[BlueBudz]

Ok thanks

[Aloner]

Super helpful video that I used to decide what I needed. Explains everything!

[Weed Pharma]

That would all depend on the light you are using and the btu's they provide- let me explain
I have a 2x3x5' tent which I have used for almost 2 years with one of those crappy booster fan combo (100cfm)- got negative pressure and still use it today under 390w- LED (about 450 btu's)

It was woefully under powered in a 2x4x6 tent with 780-930w LED (about 900 btu's) so I replaced it with a vivosun 4" (203cfm)- which can be too powerful- even when dialed all the way down.

I have a second fan controller, arriving Monday- to futher dial down the vivosun.

However, I suspect it would be fine with a 315LEC (1,200 btu's).

[Boco2017]

Thank you all for your input. I think I found what I want. But I want to make sure I get something that will work for a 315 lec light I have been trying to find an affordable lec light as I think that's going to be my next purchase. Because after this grow I'm going to try the 5 gal bucket bubble ponics and I want to have a better light for that also. But so far I haven't had to much luck finding a cheaper 315lec set up.

http://www.vivosun.com/4-inline-duct-fan-and-4-carbon-filter-8-feet-ducting-combo.html

[Boco2017]

I just ordered the one in the link on my previous post.