Negative pressure creating smaller grow space....

So....as a couple of you may know ive been struggling with lights off and lights on temps, both being around 2 degrees c to high (24c lights off & 30.0c lights on), Now I've come across an issue...yeah another one.....becusee of the heat of the room with the sun hitting it for a few hours a day, it raises the room temps which in exchange raises my grow tent temps with a knock on effect making my extractor run harder, Now when it fully kicks in to keep the temps in range which it's struggling to do for some reason as it was the best fan in the shop (6inch rhino Thermostatic adjustable extractor), but I've noticed it sucks my tent right in on all 4 sides, ive measured it and worked out im losing more than half a meter from my grow space and my grow space is only 1.2meters x 1.2 x 2.0meters.....so I'm growing in less than half my grow space when temps raise to high, Would this affect the airflow coming in? Rather than it coming in filling the tent with coolish air and then exiting thru the exhaust......is the extractor just tugging away directly at the fresh air? With it being so small i couldn't see if filling the tent correctly? I am considering side support bars to stop it sucking in but the point to this thread is......could this problem be contributing to my heat problems with the growing space going from.1.2 meters squared to say half that? So 600mm of growing space? My head is all over with this I cannot put my finger in enough pies to figure this out as a newbie grower!!! Driving me crazy!!!

 

Hey man, no I don't as when lights off its light here my timing is 6pm till 12pm the following day so 18 hours on 6 hours off, so I can't leave any vents open to cool it or it'll let light in, real shit situation, I can't move the tent anywhere else, I can't extract air in from anywhere else nor can I vent out anywhere other than the attick which it's already venting to there, I'm trying some frozen bottles in the intake ducting inside to keep things cooler on the inside, if it works then great but I'm just curious to wether the shrinking of my tent could be helping to keep it warmer

 

These aren't autos these bro there photoperiod so light getting in on a dark period as far as I'm aware is a massive no no...


As for the tent walls sucking in they all do that with powerful fans but as I said will it make the room hotter with it being half the size adding to the temps rising? If so ill get some side support bars to stop it sucking in, thus in affect should suck more fresh air thru the existing intake ducting which is mounted To my window wufjin directly from outside so fresh air is getting in there

 

Lighting bounces up and down aliuminum ducting lol lit my garden up like a Christmas tree at night because of that so had to improvise and make a vent so it dampened the light coming out of the ducting, so I presume if it can bounce out it'll bounce in won't it? Light I mean?

 

I really hope so man, it is doable I'm just trying to figure it out without it costing me an arm n a leg to fix, as I say the temps only rise for an hour before lights on and for an hour after when the lights come on, as soon as the sun gets off my room everything runs more than perfect, I just need to fix those few hours of harsh temp rises before I get into bud!! As I want this the best as possible as it's for me and for me only

 

There already is fresh air mate, it's connected directly to an opening on my window, it's because its hot outside it's potentially sucking warm fresh air from outside whilst the sun is on the window, that's my issue haha

 

Well this is my temps right now, out is in the tent, and in is in the bedroom where it all is, i l just got back and my lights off temps was fuckin sky high at nearly 26 degrees c!!!! So I put s frozen bottle of water inside the duct on the inside of the tent to cool air, and moved my vent from my window to just at the side of my bed away from the window and I have managed to drop it to 24c, my fan is set to 21 degrees c now and has been since 12pm this afternoon, I'll turn it back up to 28.5 when lights come on in a couple hours, if I made my intake duct bigger to like 8inch or 10ich would this help to cool the lights off temps? As it's nearly 4pm here now, Would also the side support bars help increase airflow with the space being bigger inside the tent? As when my fan kicks in proper I lose half a meter of growing space in a tent that's only 1.2 meters square, I'm losing my mind!!!

 

I think bigger intake ducting to 10inch will help pull more fresh air in than it already is, that'll help with the negative pressure being so hard I think, I have just moved the intake end of the vent for the intake away from the window and sat it on a unit at the side of my bed and it has sorta declined to my room temp with is 24 degrees c right now with the help of a frozen bottle of water down the duct on the inside of the tent to cool the air even more, that's the best I can do now until payday tomorrow lol, on my list is get side support bars to stop it sucking in so much, some 10inch ducting for the intake to bring a bigger load of air into the tent, and see where that gets me, If that doesn't work it'll have to be an air cooler or air conditioner which doesn't help my pocket any more

 

Because the exhaust out and fan is only 6inch, but I was told the fan alone would be overkill for my size tent which was a good thing to have on the side, I have a 6inch exhaust and extractor fan (6inch rhino Thermostatic extractor fan), have 6inch ducting running from my tent to my window to pull in air? So there the same size? Should I increase my intake ducting to 10inch?

I have just moved my vent that I built to be stealthy and sit to my window and moved it to in the room just aside my bedside unit, that's dropped the temps to the room temp which is 24 degrees c? So it has helped I suppose if I had an air cooler in my bedroom near the tip of the intake would that help? Or should I place it in my tent?