Is an inline fan exhausting a 2x2x5 tent, enough to cool a 250w MH/HPS? [+rep4help]

What was the question again?

verde,follow my flex maze!..notice how my lights r sucking air in from outside the tent,only thing exhausting air is the filter

your fan and filter should be fine. im running a 190cfm and filter with a 400 sucking through the filter to cooltube and out. and im staying 65-68 at night and 70-74 day do also have a 6in 250cfm intake with 2 6in circ fans. my mom room is 2x2x4 250w and i use a 50cfm fart fan to outtake 80cfm in and 2 6in circ fans, no air cooled or remote ballast stays like low 80s no filter on this one

You could put your filter at the end of the line. Hood->Duct->Inline Fan->Duct->Filter

GNOME GROWN said:

verde,follow my flex maze!..notice how my lights r sucking air in from outside the tent,only thing exhausting air is the filter

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First off, gnome, is that tape sticky? Annoying to get off? How far onto the glass do you need to tape it to get it air tight would you say? I just looked at my light and it looks like you actually could tape onto the glass/metal pretty cleanly without blocking out light. Do you tape up your lights?

& most importantly do you find that simply taping it seals it up enough, or are there other spots?


Seriously though Gnome, I don't know if I've told you enough but your setup is sick. Very clean. Love it. Wish I had that much space to work with! Even if I did at the moment, I would be overwhelmed unless I had a bunch of $$ to squander!

Beagle said:

You could put your filter at the end of the line. Hood->Duct->Inline Fan->Duct->Filter

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So your saying filter on the outside of the tent too, forcing air out of the filter?

shortshack13 said:

your fan and filter should be fine. im running a 190cfm and filter with a 400 sucking through the filter to cooltube and out. and im staying 65-68 at night and 70-74 day
do also have a 6in 250cfm intake with 2 6in circ fans. my mom room is 2x2x4 250w and i use a 50cfm fart fan to outtake 80cfm in and 2 6in circ fans, no air cooled or remote ballast stays like low 80s no filter on this one

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Dude you have a LOT more fans and intake/exhaust going on than me, and it seems like your running your ventilation through your hood... which I currently cant do.

yes, either way the air is scrubbed by the filter. This way you won't have to worry about sealing your hood.

Beagle said:

yes, either way the air is scrubbed by the filter. This way you won't have to worry about sealing your hood.

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Do you have experience with that?.. I'm wondering how much it cuts down on the airflow if it's like 8ft of ducting away from the inline.. 4inch 171cfm inline again

because if it cuts down THAT much I'd just be better off doing them close inside the tent exhausting out ignoring the hood right?

If you want to air cool your hoods and keep the smell down your choices are

Filter->Duct->Hood->Duct->Inline fan->Duct->Where ever the end is or
Hood->Duct->Inline Fan->Duct->Filter

It wouldn't hurt to try them both. Whatever works for you.

Beagle said:

If you want to air cool your hoods and keep the smell down your choices are

Filter->Duct->Hood->Duct->Inline fan->Duct->Where ever the end is or
Hood->Duct->Inline Fan->Duct->Filter

It wouldn't hurt to try them both. Whatever works for you.

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If I don't get my genetics tomorrow, i'll unplug the ducting from the hood... and run JUST intake/exhaust with the hood lights on & see what kind of temps I get!

If they suck, I will tape up the hood & make it air tight as possible

dude tape up ur damn hood and cool ur hood and suck through the filter!!!!lol once ur done ur grow just take a razor blade and scrape the tape off!

jsut tape like a quarter inch all the way around or somthing..its gunna seal ur hood!...i have rubber gaskets on my cool hoods!

GNOME GROWN said:

dude tape up ur damn hood and cool ur hood and suck through the filter!!!!lol once ur done ur grow just take a razor blade and scrape the tape off!

jsut tape like a quarter inch all the way around or somthing..its gunna seal ur hood!...i have rubber gaskets on my cool hoods!

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gahh okay... what kind of tape is best? foil tape?

id go with either foil,or duct tape!

I'll go for foil.. I don't like duct tape

also do you clean the glass on the hood? I gave it a quick wipe down with a cloth but I didn't Windex it or anything.. maybe I should when I switch bulbs to flowering & tape it in?


I'm also looking for a fan controller.. the stores want $30 for one! I'm thinking there is cheaper online?

What hydro site are you using gnome?

yah u can use windex on the glass,i do once and a while..
i dont buy shit for my grows online..that leaves a paper trail homie..theres a few hydro stores not to far from me, i always pay with cash!

GNOME GROWN said:

yah u can use windex on the glass,i do once and a while..
i dont buy shit for my grows online..that leaves a paper trail homie..theres a few hydro stores not to far from me, i always pay with cash!

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yeah same here but I saw them for like $15

guess your right though