Indoor Keeping heat down?

[Think]

Should be.. the 4" intake I have is not very powerful hence the low price.. it just sucks in some of the cooler air from outside the tent.. 4" extract, more powerful than the intake, and carbon scrubber still working fine for air out.. so I would have thought a 5" extraction should cope with it ok.. how do your temps look now with cardboard over your thermometer??

I've always had the cardboard over the meter and it's reading high 20's 27-28 did go to 29 at one point. Okay Ill probably get one then! Cheers man