CFL heat question

[chadsvb]

As for computer fans, you can get them up to 360mm in size, but the most popular of the larger fans is 120mm (popular among computer users, that is). And I must say wow! I just looked at the CFM ratings on these 120mm computer fans; I never realized the CFM's were so good. One 120mm computer fan, rated at 133.60 CFM. I never would have thought they'd pull that much air.

Either way, here's a link to that fan:
Newegg.com - Scythe DFS123812-3000 "ULTRA KAZE" 120 x 38 mm Case Fan - Case Fans
(if the link doesn't work, go to NewEgg and search for DFS123812-3000)

Anybody heard of running a small carbon scrubber with these small fans?

[jay2431]

wow thanks im from uk but now i know what im looking for wow them things can push a carbon filter wow wow wow wow stealth stealth

[sensilights]

For about $35 you can get a 4" in-line duct fan (go to any evil big box store (lowes, home depot, ...) and check out the hvac department) which will push nicely through a passive exhaust with a carbon filter, and its a perfect size for a rubbermaid box.

[ConanTroutman]

Hey Chadsvb,
Im running a 120mm computer fan at 9V,not sure of the CFM...but I have 2 home made carbon scrubbers attached to it,both intake and exhaust side of it. It seems to work fine and still does the necessary venting.

I have only about 3 23Watt bulbs in about 8 ft sq space and the vent is only 20mins every hour. I also have an oscillating fan made from a pusher prop for an rc aeroplane and a mini motor. My temps stay around 80f, which is maybe a bit hot compared to optimal but growing fine.

Good luck drewdp, dont sweat it too much, in my limited experience this stuff grows easily.Peace

[Mississippi Steve]

Hi all. I'm working out the details for a rubbermaid grow setup that is going to be 7.39 sq. feet. It's going to have 2 passive intake holes about 1 1/2 inches wide on one side, and 2 computer fans hooked up on the other side for active exhaust. I want to put 8 40 watt CFL's in it for a total of 21200 lumens.

My question is, am I going to have a major heat problem with this much lighting and this small of an exhaust? I don't want it to get over 85 degrees and I would prefer not to burn down my house. The room I will have it in is going to be pretty cool during winter - around 55-60 degrees F. If I am going to have a problem, should I go with fewer lights or a better exhaust?

dunno.... my cab is a 6 ft triangle thats 8ft high, has 10 23watt CFLs and and 10 4ft 2 tube T-12 flouro fixtures in it. the room temp runs between 70 and 75, the tops of the plant run around 80. The top of the cab is open and I have a 16 inch box fan blowing in from the bottom of the cab. I have been getting great results.