temperature problems i dont know what im doing wrong...

[GreenScreen]

ive tried almost everything to get the mother temps down when the curtain is closed but nothing seems to work.. i even put a fan into the lighting chamber for intake... the temp just always seems to slowly rise... im wondering if its because the computer fans... i have looked up a lot of grows and idk if this is true but am i supposed to have more intake than exhaust ??? example: have 4 intake fans and 3 exhaust fans... the fans are 32cfm each i got 4 exhausting the flower box and temps are still reaching the 90+ with the shade closed... this just has passive intakes right now do i need to add a non passive intake ?? or maybe i should close up the holes and stack the fans one on top of each other and just use 1 80m exhaust hole so it will build a higher static pressure... or do i need to get a more powerful fan like a blower... this has been bothering me for a week cuz i have been having to manually put the shades up and down... don't wanna have to do that... my apartment is set to 75-76 so ambient temp is low... im trying to make these semi hidden so cant use anything loud and have to have light traps on everything...

this is a rough draft of my box done in paint.. but basically there is the main intake on the bottom and the main exhaust in top.. intake is about 11" X 4"...
if you wanna see a my basic setup without the fans check out my sig link...

 

[Kenny Lingus]

HI! I started of in a similar box at h115 x w 50 x d50 cm, but used a 400hps and one 15cm 220v pc/electrical cooler fan on regulator. It worked as a charm and the plants loved that tiny mylared "light and air tunnel" (Had my first gpw in it too.)

Here are my considerations:

Only put passive intakes on bottom, and make sure the size of passive intakes are 3 times the size of outtakes. (With a steady flow of cool air from below and out on top, the temps shouldn't hover. It'll depend on ambient temps of course, but if your room is around 20centigrade it should be just fine.)

I would also lower the floor of my plants and make a buffer zone above the lights to gather excess heat before it gets vented out. (If you can add an air-dryer duct to an outvent you'll be even better off.)
-All the empty space should be on top of the box, and not under the pots.

PS! Computer fans don't necessarily move most air at a full hauling... Try it out and make sure all run together. (having each of them inside seperate 15cm tubes will make the pressure a bit better, and possibly stop any struggle between them.)

 

[FreezerBoy]

I'd have said 2:1 but, yes, you need more intake than exhaust. The intake is the limiting factor. If the intake brings in "X" amount of air, that's all you can exhaust no matter how many fans you have.

Can't find it now but, Azeotrope posted info on stacking axials back to back. This provides greater airflow than running them side by side. Unfortunately, Az has left us. Apparently, his threads went with him.

 

[sophisto]

I maybe didnt read your post correctly but what type of light are you using???

Is it air cooled??

Where is your intake air being drawn from???

Where is your exhaust exhausted to???

You may need one of the following IMO,
1. LArger intake
2. Air cooled light
3. Better cooler intake air
4. Introduce Co2...

 

[GreenScreen]

i got 8 cfls as shows in the picture 8 26 watt cfl's... it is air cooled because the lights are in a separate chamber.. intake is at ground level where all the cold air is... i think im gonna try and stack the fans today.. see if that works cuz it kinda feels like im lacking in static pressure... im just gonna leave the same size hole and work with the fans.. if all else failes ill just make a bigger hole.. cuz the hole right now is 11X4" and the out is 9X3".... 3X that would be an 8X11" hole which ill try at the end of everything if all else fails... oooo in the middle of this post i got my package :O marijuana buds for less by seemorebuds he should have something juicy about the exhaust hehe... well time to start reading...

 

[GreenScreen]

well nothing juicy in the book so its time to stack my fans and take pics of the pretty girls testing will now commence.

 

[GreenScreen]

well i can say the temperature has been taken care of i took 1 of the three fans out and stacked it on one fan and added another so i have 2 2stack fans pulls air like a beast :O mid 80's now which is fine for me but in the process of all this i found a cool site for info on stacking the fans.. but the real good info is from the people who tried it out..
stacking fans

 

[messn'n'gommin']

I'm confused. By your diagram I see that your lights are essentially air cooled but the only thing that comes to mind is either not enough fan exhaust or there is some kind of air flow restriction somewhere. What were your temps before you installed the glass between your lights and your plants? Also, I can't see them if they are there, but do you have any holes cut in the shelf your flowering plants are sitting on? I am as stumped as you green. G'luck...hope you solve this.

 

[GreenScreen]

ya i drilled a bunch of holes into it and it sits about an inch away from the shade... so it should have a good amount of airflow... im kind of thinking maybe i should turn that fan that is behind the plants around so it blows in... it might help a little but that is where all the exhaust blows out so idk if that would be a good idea...

 

[messn'n'gommin']

ya...I agree...probably would be better to just leave it like it is. You say you doubled up the exhaust fans for your flowering section?