Ok, I have 4' x 4' dr grow tent, with a 4 inch carbon filter (can filter) set up ventilating the tent. I have a 8 inch sun system cool sun reflector with the glass, being cooled with an 8 inch can fan, seperate from the room exhaust. I am still having odor problems it stinks still like a dam skunk outside of the tent! Does any one know what the problem could be? what else can i do to properly nutrilize the odor consistently, with out having to spray deoderizers all the time? Any suggestions will be very appreciated.

i have my filter with the fan sucking it out and goin through a hose out the top. do u got urs blowing in or sucking out. donno if it matters but filter helped my problem alot

I have my fan sucking air from the carbon filter blowing out of the tent.sounds like the same way you have yours. thanks for the reply

Make sure your tent does not leak...some of the odor may not be making it through the filter and seeping out from your tent, causing your smell. Just a thought, hope it helps.

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Yeah make sure you don't have any leaks. What do you have as your intake? You want negative pressure so the filter can do its work.
The way I have mine set up is Filter > 2ft Ducting > Fan > Ducting to out
I have a passive intake but with a 6 inch vortex there really is no noticeable odor with a full flowering tent.

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I just realized that you said you have a 4" filter and 8" fan. Your filter probably has a cfm rating and your fan might be too strong. Just a thought.

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I'm going to guess you are exceeding the CFM limits of that carbon filter.

Filters have CFM limit - I bet that 8" is pulling too much air. Look up your filter and compare it to the CFMs of that fan.

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if the humidity is to high the carbon gets moist and doesnt work

Exactly what I was gonna say!

thanx for the reply.. NO. the 8 in. fan is cooling the reflector only. I have a seperate 4 in. inline fan for the carbon filter. it is the eco plus. but its 4 in.