Ventilation question for 2x2 Tent

I've done quite a bit of research on Google and I keep finding differences in opinion and could use some assistance.

I have a grow tent which is 2x2x4 and have a carbon filter + extractor fan inside the tent (above the light). The ducting goes from the fan, out the tent and close to a window in the room I'm growing in. There are two 'socks' at the bottom of the tent which I left open to allow passive intake, however the room has some clutter which I cannot currently move so the intake isn't as good as it could be.

I tested it out last night and the temperatures were getting up above 28°C which is obviously too hot so I was wondering what I can do to lower the temp? A lot of people have been saying to get an intake fan and some ducting while others say just to use ducting which brings in fresh air from outside.

Before I go spending more money on an intake fan can anyone recommend what the best solution for this overheating would be please?

Thanks in advance.

-Raggidy

Are you using an inline centrifugal fan



Or a duct booster fan



Also,how much and what kind of lighting and what is the ambient temperature (temp of the room your grow pulls it's fresh air intake from)?

This is the fan I am using: http://www.amazon.co.uk/Hydroponic-Grow-Room-Fan-Extractor/dp/B00E0ELQJ6/ref=sr_1_7?ie=UTF8&qid=1395421624&sr=8-7&keywords=grow+tent+fan
The ambient temp of the room is ~ 20C (about 70F)
Lighting is 250W HPS.

Another question, should the extractor fan & filter be outside the tent?

Thanks for the response, it's much appreciated

28°c is like 82.4°F while not too hot,it's not ideal either...try dropping the room temp down 2°F/C

you shouldn't need an intake fan bro. Just clear your vents

After some more reading and moving things around I discovered what the issue was. I was being pretty stupid and had the thermometer sitting in the light directly, so it's now covered and the temperatures are a little cooler.