Temperature issues....

So after months of planning and hundreds spent I finally got my first grow underway, 1 SSH, 1 LSD, and 1 Trainwreck. All three beans popped without issue (two in soil and one in rockwool for hydro) and so I put them in my grow tent (78"X78"X78") under my 600W MH set at 50% power. I know I need to invest in some CFLs for vegging, but I didn't want to wait to get growing and decided to simply use my HID for my first grow.

The problem arose three hours after putting them in there when I realized inside the damn grow tent is scalding hot (83-88F depending on which one of the tent's three thermometers I am reading). I did have plans on getting an inline duct fan before flowering (I knew heat was going to be an issue) and I needed to use all 600W of my light (which has a 6" cooling tube), but clearly something needs to be done sooner. I have all the vents and doors open of my tent (I'm not worrying about lost lumens at this point) and I do have a strong floor fan in there, but it only helps so much.

What should I do? Go out and buy some CFLs? Or should I try and address this issue before flowering? How effective are inline duct fans at removing heat from grow tents, I remember reading somewhere (probably here) that 240cfm should be sufficient for a tent my size, would something like this work?
http://www.ebay.com/itm/VenTech-4-6-8-Inch-Duct-Booster-Inline-Blower-Fan-/181241936549?pt=US_Hydroponics&var=&hash=item2a32dc7aa5

I should also mention that my grow tent is in a room that is only slightly larger than the tent itself (I didn't realize how big the damn thing was, it was a nightmare putting it up in such a small space), will this matter while trying to cool this bitch down?

Any help would be greatly appreciated.



T.

those inline tube fans from ebay are junk, they are so noisy you wont handle them for the first few minutes. get a actual exhaust fan from a grow store or something. http://www.amazon.com/Hydrofarm-Active-Air-inch-In-Line/dp/B002JQ14F8/ref=sr_1_40?ie=UTF8&qid=1400369223&sr=8-40&keywords=hydrofarm something like this.

It is 400 cfm which is more than enough to control temps if you buy the fan controller separate and dial in the speed that pulls the perfect amount to cool it down.

Those fans are really that bad? Is it just the noise (unless it sounds like a damn lawnmower, noise won't be an issue), or are they simply inefficient? Deep down I know I should be looking at proper exhaust fans, it's just I've already got a lot tied up in this and funds are low at the moment. With that said, I will definitely look more into them. Thanks for the input.

EDIT: Damn, I didn't notice the 68dB on the fan page...that certainly is noisy, but not horrible. About as loud as a vacuum cleaner, I'm guessing.

I put in a window fan in the room and it's pretty chilly outside (57F) so that made a huge difference, temps in the tent are down to 72-75F and I'll expect they'll drop lower as time goes on. Perhaps I should consider changing my light schedule so that it is off during the hottest part of the day and let it run more into the night...

i used one at my old work, it starts off a little noisy but few weeks down the line of constant use it got louder and was moving around a lot more it eventually moved so much the blade went through the housing and it locked up lol. they can be dangerous so many sold because they are so cheap and work better for intermittent use.

Duct booster fans IMO should never be used to exhaust.

Powered intake they work ok but as soon as you start restricting the flow with ducting or a carbon filter then they turn to shit.

A good inline exhaust fan is a paramount piece of kit and spent wisely on a reputable brand with good warranty then they can last you a good few years.

Make sure when you do invest in one (because you should!) that you familiarise yourself with how it comes apart for cleaning.



J