Newbie with a lot of knowledge
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iwltfum
New Member
Not sure what your asking. Can you be more specific?
Lol I second this
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I have a 2 x2 x4 ft. Grow box home made it has a shelf at 8 inches from top to house electrics ect. Suspended below this I have a 8 inch dia carbon filter with inline fan Sat on top and ducted to outside of box Below shelf I have a suspended system for lights with 4 x 55 w cfl @ 6000 k 3000 lum. And 2 x 24 w cfl @ 2400k 1700 lum. Below this I have a scrog screen at bottom of box I have 4 x 2 inch dia passive intake holes
The problem is that the temperature inside is 130 deg. It is so hot that the metal base of carbon filter is to hot to touch. How can I cool this set up down
The problem is that the temperature inside is 130 deg. It is so hot that the metal base of carbon filter is to hot to touch. How can I cool this set up down
8" inline for that small of a space is ALOT. But that also means it should be evacuating a lot of the heat. You do have an intake hole/fan to bring in fresh air right? And your tent is inside?
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iwltfum
New Member
That's exactly what your problem is. An 8" inch filter needs to be used with an 8" fan and preferably with 8" ducting. A 4" inch fan might be enough for your room, but the 8" filter is what's throwing off your output abilities, which is probably making it so the passive intake isn't really working properly. If the box is closed and the scrubber fan is on, can you feel air being sucked into the room through the passive intake hole?
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iwltfum
New Member
I'm not familiar with cfl's for growing purposes so I'm not sure if those are what's causing your heat. Do you have any open air fans in there?
Depending on the porosity of your filter, you will loose a good percentage of your cfm's if you are pulling through a filter that's too big.
EDIT: It might actually work better if you were pushing air through the filter in this case, instead of pulling. Usually, you want to always pull air with inline fans, but the build up of pressure from pushing might actually help to get the air through the filter. I'm just spitballing with that idea. It definitely isn't good for your fan motor.
Depending on the porosity of your filter, you will loose a good percentage of your cfm's if you are pulling through a filter that's too big.
EDIT: It might actually work better if you were pushing air through the filter in this case, instead of pulling. Usually, you want to always pull air with inline fans, but the build up of pressure from pushing might actually help to get the air through the filter. I'm just spitballing with that idea. It definitely isn't good for your fan motor.
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iwltfum
New Member
Yeah, You would have to put the filter outside the box. The more I think about it though, the more it sounds like a bad idea.
rhetorrikz
Well-Known Member
Post up a photo so we can see the setup bud. Try taking the filter off for the day and monitoring temps
iwltfum
New Member
Brilliance
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rhetorrikz
Well-Known Member
Hard to see but it looks like you did well with the cfl's 
is there much space above the lights to allow heat to rise ? Then a fan up high that removes the heat?
is there much space above the lights to allow heat to rise ? Then a fan up high that removes the heat?- Thread starter
- #20
Yes the fan is inside top shelf with filter hanging below it the light bar has hole as photo so it can go up down ect
I was told that the filter might be too big for the fan so not drawing the hot hot hot air out
I was told that the filter might be too big for the fan so not drawing the hot hot hot air out
