Will this fan http://www.htgsupply.com/viewproduct...roductID=46447 cool this cooltube http://www.htgsupply.com/viewproduct...roductID=48137

I understand that it is a booster fan but it has 160+ CFM free flow. So will it work?

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And also i noticed alot of people have ducting coming from both sides of their cooltubes... why? Cant u just setup a fan with some ducting connected to the cooltube to suck the heat of the bulb and leave the other side of cooltube open? Why do i need ducting on both sides? This is a pic of what i mean.

Attached Images

Pic_s_CoolTube_Install-08-08-14_1_017.jpg (51.4 KB, 47 views)

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Anyone Feedback?

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the pik u showed... i think the persons hooked it up so that it succks in cool air directly from outside the grow area instead of maybe warm air inside the area. this way cool air keeps the light cool....

oh thanks.. anyone else have any ideas? +reps

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That fan will/might be enough. What size/type lamp? (but I wouldn't use it. Any bends in the duct is gonna kill the effective flow)

The ducting isn't *needed* on both ends, but it does/can help.
You can use colder air to cool the lamp. Using room air, which is a higher temp then outside air, will give less cooling. Radiated heat from the light is unavoidable. IR will pass right through the cool air passing by the bulb (the sun does a good job of getting its heat to the earth's surface)

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The Temporary Relief Assistant Trailer Park Supervisor. Carmelisous Jornl :: ElecUsageCostsCalc (now with carbon footprint) :: FloroTubeCompendium ::

There are two reasons I've noticed people have ducting on both sides. They're either running a loop in and out of the room to make sure the air is cool. Or they're using a carbon scrubber on one side, and exhausting it out of the room on the other.

I have used those same small fans to work with a 400w when I was in a crunch. Obviously you'd be better to get a higher CFM fan, but I'd say you could use this with a 400 and get away with moderate temperatures assuming your conditions arn't atrocious. I was using it in a room with ac on 78 and it kept my canopy around 80-85.

Thanks guys +reps!

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oh, you can get those fans at lowes or Home Cheapo too. One on each end in a push-pull should work well enough for a 400 hood/tube with no filter/scrubber.

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The Temporary Relief Assistant Trailer Park Supervisor. Carmelisous Jornl :: ElecUsageCostsCalc (now with carbon footprint) :: FloroTubeCompendium ::

good luck using those fans. Axial fans like the one you linked to have very little ability to push against static pressure. What I mean is it will flow almost nothing once you put more than a few feet of ducting on there. I bought a 4inch to use as an intake fan blows great until you put a duct on it. It blows almost nothing through anything more than 3-4 feet of ducting.