Stupid question

[Greedyfly]

bought a tent combo with vent fan and charcoal filter and of course scant instructions and even then just on tent assembly. The charcoal filter has what looks like a thin foam covering held on by two Velcro attaches straps. Does the foam need to come off or is it part of the filter?

Thanks for any guidance

 

[KrazyG]

bought a tent combo with vent fan and charcoal filter and of course scant instructions and even then just on tent assembly. The charcoal filter has what looks like a thin foam covering held on by two Velcro attaches straps. Does the foam need to come off or is it part of the filter?

Thanks for any guidance

Yes leave the foam on, it's a pre filter to catch dust and prolongs the filter life.

 

[Greedyfly]

Yes leave the foam on, it's a pre filter to catch dust and prolongs the filter life.

Thanks KrazyG, the filter is on the end of the airflow. Ie the fan is in the tent blowing out and through the filter and the last thing it would go through is the foam.

 

[KrazyG]

Thanks KrazyG, the filter is on the end of the airflow. Ie the fan is in the tent blowing out and through the filter and the last thing it would go through is the foam.

The fan should draw the air through the filter then the fan blowing out of the tent, that's the most common way of running filtration.

 

[diggs99]

From all of the reading i have done, most of what i have seen recommend pulling the air through ie:

carbon filter ---> light---> fan----> out of tent

Carbon filter ---> fan ---> out of tent ( if not using air cooled hood)


I am also very new to all of this, so hopefully someone smarter and more expierenced can confirm or correct .

 

[Roger A. Shrubber]

they can be used either way, but are much more efficient if you're pulling air through them, than if you're trying to force air out of them.
pull in through your filter, through your light, through your fan, then outside

 

[Greedyfly]

Thanks, guess it’s a newbie faux pas. I’ll switch it around. Just starting my 2nd grow and had poor odor control during flowering on 1st. Hopefully it’ll work better swapped around.

 

[Roger A. Shrubber]

it'll be better than not having one, but you get what you pay for. the only ones i'd buy at the moment are Phresh and I-power. the phresh is a better filter i think, but the i-power is made to be refillable. if you spend a little on good australian virgin charcoal, they'll last at least a couple of years before you need to refill them. most of the cheaper units are pretty much good for a year then throw them out. maybe two years, if you're not growing a lot, and have low humidity.

 

[Greedyfly]

Thanks Roger, first grow was very odorous in the house, tent is in garage, smelled nice (to me) the second I came thru front door. Wife wasn’t too keen though. Will swap fan/filter around hope that will be much better. Pretty sure Amazon vendor wasnt generous with filter quality, will definitely step up to something good to allow some semblance of stealth.

 

[Thegermling]

Always put the carbon filter to fans intake. If you put the fan on the exhaust side or outside the tent it kind of defeats the purpose of having a pre filter for the dust.

 

[Greedyfly]

Gotcha, lesson learned. Thanks.

 

[JohnDee]

Phresh and I-power. the phresh is a better filter i think, but the i-power is made to be refillable.

Phresh can be re-filled once you drill out the rivets. Then put it back together with sheet metal screws...for the next time.
JD

 

[Greedyfly]

Nice to know the experienced hacks.

 

[Lordhooha]

Nice to know the experienced hacks.

Making the tent negative pressure rather than positive makes it so the stank has nowhere to go but through the filter. In a positive pressure the stank can escape through the nooks and crannies making it stinking in the house.

 

[Greedyfly]

Ah ha, that makes sense. Thanks

 

[JohnDee]

Making the tent negative pressure rather than positive makes it so the stank has nowhere to go but through the filter. In a positive pressure the stank can escape through the nooks and crannies making it stinking in the house.

Just curious what exhaust scenario would create positive pressure in the tent. Certainly not filter placement.
JD

 

[Lordhooha]

Just curious what exhaust scenario would create positive pressure in the tent. Certainly not filter placement.
JD

Honestly for what we do I’d never suggest doing it. The main point is maximum scent control. Most greenhouses use negative pressure in a sense pulling air in and exhausting from one end to the other

 

[JohnDee]

Honestly for what we do I’d never suggest doing it. The main point is maximum scent control. Most greenhouses use negative pressure in a sense pulling air in and exhausting from one end to the other

Hi Hooha,
I was actually trying to figure out not why but how...and as I was reading your post I had an ah ha moment. Say you didn't have room in a tent for the fan and decided to pump fresh air into the tent rather then passively. Then you'd get positive pressure inside the tent. Agreed...bad idea. I'm just a little stoned and slow this morning.
JD

 

[Lordhooha]

Hi Hooha,
I was actually trying to figure out not why but how...and as I was reading your post I had an ah ha moment. Say you didn't have room in a tent for the fan and decided to pump fresh air into the tent rather then passively. Then you'd get positive pressure inside the tent. Agreed...bad idea. I'm just a little stoned and slow this morning.
JD

Lol