3x3x6 grow tent ventilation question +rep

webb107

Well-Known Member

• Nov 21, 2010

• #1

Hi all,What would be a suitable out-take fan for this size room

 

webb107

Well-Known Member

• Nov 21, 2010

• #2

if i makes any difference there will be a 600w hps in this tent

 

420God

Well-Known Member

• Nov 21, 2010

• #3

I have a 190cfm and the same size tent and it works great.

 

Jefferstone

Well-Known Member

• Nov 21, 2010

• #4

Roughly 250cfm would probably work. I've used one 110cfm for my hood and one for a carbon scrubber and it worked fine.

 

420God

Well-Known Member

• Nov 21, 2010

• #5

webb107 said:

if i makes any difference there will be a 600w hps in this tent

Click to expand...

Air cooled?

 

420God

Well-Known Member

• Nov 21, 2010

• #6

I have a 400w air cooled hood but I have to turn my fan down or it can suck the walls of the tent in.

 

webb107

Well-Known Member

• Nov 21, 2010

• #7

420God said:

Air cooled?

Click to expand...

yes, would it work if the air inside the tent was sucked through the cool tube and then out of the tent?

 

webb107

Well-Known Member

• Nov 21, 2010

• #8

or would it be better to let the cool tube have fresh air from out side to cool it and have another fan to extract air from inside the tent to out the tent

 

Jefferstone

Well-Known Member

• Nov 21, 2010

• #9

Would you need a carbon scrubber?

 

webb107

Well-Known Member

• Nov 21, 2010

• #10

Jefferstone said:

Would you need a carbon scrubber?

Click to expand...

yes ofc im going to have a carbon filter

 

webb107

Well-Known Member

• Nov 21, 2010

• #11

would it work if the air inside the tent was sucked through the cool tube and then out of the tent or would it be better to let the cool tube have fresh air from out side to cool it and have another fan to extract air from inside the tent to out the tent?

 

420God

Well-Known Member

• Nov 21, 2010

• #12

Something similar to this would work well.

 

webb107

Well-Known Member

• Nov 21, 2010

• #13

420God said:

Something similar to this would work well.

Click to expand...

Thats exsactly what i needed to know, thats the set up i want to do, would a fan that takes out 285m3/hour be enough for a 3x3 tent with that set up?

 

Oldreefer

Well-Known Member

• Nov 21, 2010

• #14

I'm using the same tent also with a 400w cool tube. My 2 -4" vortex fans are located outside the tent with one pulling through a charcoal can/cool tube...the second fan blows in fresh air ducted in from a crawlspace. The fans stay at around 1/3-1/2 speed and I stay at 77-81 degrees during the 16/8 cycle. Very controllable....exhaust empties into a large closet......4 autos are in flower and are very stinky when the tent is opened but no odor at all in the closet.....My cooltube setup is like the pic above except I have the charcan above the light so it's drawing the heat at the top of the tent also.....

 

420God

Well-Known Member

• Nov 21, 2010

• #15

Should be as long as the room the tent is in doesn't get too warm.

 

webb107

Well-Known Member

• Nov 21, 2010

• #16

ok thanks for the help from both of you plus rep

 

Jefferstone

Well-Known Member

• Nov 21, 2010

• #17

The reason I asked is that not everyone uses a carbon scrubber. I try not to assume.

One other option is if you require the least sound possible from your grow you can use two smaller fans with a lower sone rating, but a total CFM that is the same. You can put one on either end of the flow, or use two ducts.

Good luck and great yields to you....

 

LT1RX7 Drifter

Active Member

• Nov 21, 2010

• #18

400 cfm always over ventilate if not running co2

 

mango tango

Well-Known Member

• Nov 21, 2010

• #19

i got a 435cfm in my dr100 pullin through a 400w/ daystar hood and i resupply the tent with the heat to keep it warm cause its in my atiic and have an 80cfm intake fan at the bottom bringing in fresh air