Indoor Temperature issues. Hope someone can help!

[dank0r]

Well I finally finished putting together my grow box. Its 2 rubbermaids 25 gallon totes lined with foil tape. I have a 120mm rated at 78 cfm as a exhaust and 5 - 1 1/2" passive PVC pipes in the bottom. I am doing some tests on temps and up by the top canopy about 8-10 inches from the cfls I get high temps. With 6 cfls the temps are about 94 degrees and with 4 cfl's I'm at 90. If I add a small 4" desk fan from the bottom blowing up to the exhaust I can get the temps to 88 (4 cfls) I'm am completely stuck and giving up on hope right now. Can someone give me some ideas.. thanks

 

[dank0r]

I have a 120mm fan on top with 5 passive ports in the bottom. The overall space in the is 27x19x33!! Canopy temps are at 94 degrees with 6 cfls and 90 with 3 cfls. Room temps are at 75. Sucks that I bought a ph meter,soil, water air pumps,beans, and everything possible to make it happen. Good amount of money spent over 200$ and can't do anything now. But I guess your can't win them all.

 

[KindredSpirit]

I think the square fan in the round ducting is a big part of the problem. The fan isn't going to pull air efficiently through the duct because of the gaps between the edges of the square fan and the inner wall of the duct. With your current setup, you're sucking a good deal of air from the outflow side back around the fan, instead of drawing it all from the inlet. I would go with one of these or something comparable: http://www.homedepot.com/h_d1/N-5yc1v/R-203227162/h_d2/ProductDisplay?catalogId=10053&langId=-1&keyword=duct+fan&storeId=10051

 

[dank0r]

Hey kindred the temps I been posting are are without the ducting... I get what your saying though. I figured I would of given some test runs without the ducting before even considering it a option at this point. Thanks for your help bro..

 

[Duck Commander]

What are your temps 3inch below your CFLs?

 

[dank0r]

Muddy has gave me great recommendations and we figured that the fan I put in there now should be enough to move move enough air in there. But temps up top are still getting hot..

 

[fullauto]

Kindred nailed it! I had 2 35 gallon totes clamshelled with 7 cfls inside and i had to use one of those 6" duct fans from HD to get the temps down. Those 120mm computer fans don't cut it as i tried a bunch of different ones before i got that duct fan.Cut and mounted a hole in the top tote on one side and put a 6" hole in the bottom tote opposite so the air would be pulled across the tote and up and out.Worked like a charm.By doin that you can also run a piece of flexible ducting from the duct fan down into a bucket with a few furnace filter freshners in it and it will take care of your smell for 1 plant.

 

[KindredSpirit]

Hey kindred the temps I been posting are are without the ducting... I get what your saying though. I figured I would of given some test runs without the ducting before even considering it a option at this point. Thanks for your help bro..

Ahhh gotcha. I thought you were using the scrubber you made:

I'd say if you add the inline fan to that scrubber and pull through the filter, you'll be golden. Even if you get one that's a little bit overpowered, it will just save you A/C costs by not having to keep the ambient temperature as cold. Better to move too much air than too little.

 

[KindredSpirit]

Kindred nailed it! I had 2 35 gallon totes clamshelled with 7 cfls inside and i had to use one of those 6" duct fans from HD to get the temps down. Those 120mm computer fans don't cut it as i tried a bunch of different ones before i got that duct fan.Cut and mounted a hole in the top tote on one side and put a 6" hole in the bottom tote opposite so the air would be pulled across the tote and up and out.Worked like a charm.By doin that you can also run a piece of flexible ducting from the duct fan down into a bucket with a few furnace filter freshners in it and it will take care of your smell for 1 plant.

Word! :thumbs::thumbs:

 

[KindredSpirit]

Also, if you look in the description of the duct fan that I gave you the link for, you can hook that fan up to a fan speed controller or a temperature sensitive switch. I think the fan speed controller (as long as it's a continuous rheostat dial and not one with just low - medium - high settings) would give you better control. Just my

:smokebuds: