Exhaust fan for grow room help please!

I was just thinking.. If my ambient temperature in the grow room with all fans on (So 2 fans and an exhaust fan and no light on) is 35 degrees celsius then even a cooled hood would not help lower the temperature (because my temperature is already way above the optimal temperature (28 degrees celsius) with no lights on) So i'm guessing its impossible to lower my grow room temperature without AC or bringing air from another room or something now.. right?

So a cooltube needs an exhaust.. I really am confused how it works.. I have an exhaust fan at the top of my tent, can I just attach it to the cooltube with duct and then will that cool both my tent and the bulb?

Purplehaze01 said:

So a cooltube needs an exhaust.. I really am confused how it works.. I have an exhaust fan at the top of my tent, can I just attach it to the cooltube with duct and then will that cool both my room and the bulb?

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That sounds about right at least you will be getting the heat out faster.

I have not used a light like that, but I think you'll need a two way or something to hook up tent exhaust and light exhaust.

How does the cooltube even work? Isint that the same as having no cooltube? just the extractor pulling hot air from the grow room out? Or do i actually have to put a fan pushing air onto the bulb with the cooltube? So confused.. Do I actually need a fan blowing through the cooltube to cool it down or could I just attach it to my extractor fan and that will pull all the heat out?

I would probably pull air through a filter then through the light and out of the room. At least that sounds like it would work. I don't know if it has to be on a complete separate fan exhaust system. The hood is enclosed and just needs air pulled through it and out of the room.

A filter? Like for smell? I don't really mind about that, not yet anyway. Yeah.. but I still don't understand the need for the cooltube then because doesn't my exhaust just pull the heat out of the room anyway?

Go to youtube, type in "air cooled hood". And there, absolutely every question you might have should be answered in the first few vids, but use a little discretion when reading the titles.

Air cooled hood would be too expensive for me so I need an alternative such as a cooltube perhaps but I can't find anywhere an answer to my idea which is why would I need one if my exhaust should pull the heat out of tent anyway? Will it actually reduce my temperatures even more if I duct the cooltube to my exhaust? Isin't that going to do the same as just exhausting the heat from the room without the cooltube? Do I need to buy another fan to blow air on the bulb? or will my exhaust be enough?

You can always just try without one. If your temps are too high then there you go.

I have tried without one and it's too high but will having a cooltube duct to my exhaust cool things more? (no fan blowing onto the bulb)

Yes cool tube/air-cooled hood will help alot

Thanks very much! I will get the cool tube

Awesome man it will help lots!!! Honestly, you should be able to find what you need for cheap on eBay. I've even found good deals on Craigslist. I've picked up a good deal or two myself.