Hey guys my room is 3x3x5' and i built a diy cool tube with a 230 cfm inline fan. Im not sure what temp would be w/out the cool tube but with the tube my temp reaches 105. I coordinated exaust cyles to run when temps get too high but soon as I stop exausting temps go right back to 105. Im injectin co2 so this is no good . I really need to know if my cool tube is functioning properly. My light is 600 w. What are your room temps if you dont exaust. How hot does it get directly under your light. What size fan do you use? What diameter tube do you have? What diameter fan and exaust duct do you use. I will be adding an electrical enclosure A/C unit so I can cool without exausting any co2 from the room but I want to maximize the cool tube and I dont think I am right now. Any ideas are greatly appreciated and will get +rep.

Thanks

I am gonna take a stab at this.

What I believe you are doing is only having the cooltube hooked up with the exhaust going out of the box.

I would suggest not to do this.

I would hook up both ends of the cooltube.

Have room air fed into the cooltube from outside of the cab you are using. the vent that same air outside the cab.

See a pic of my setup.

You would then need a separate exhaust fan on the top with holes on the bottom to vent the cab.

That is what I would do, and hopefully will help you

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