Ducting help, High temps

Hope you can figure out my shitty pics.
Need some suggestions on my ducting set up as my temps keep hitting around 95 F. The pics are my current set up. All 6 inch ducting, have reducers on the 8 in inline and the 10 in centrifugal, I think my a/c is pushing hot air into my veg tent. Was wondering anyones thoughts on ducting the a/c through the cooltubes? or splitting the duct that goes to the 10 inch with a Y connector and have veg tent on it's own and duct the a/c and the cooltubes out the other?

The 10in runs while the flower tent is on (the 2 x 600W) for 12hrs straight then every half hour for the rest of the time.
The 8 in and 6 in run 18 hrs while vegging.
I just use the A/C when needed as it has to be turned on manually

With my little experience I would say move that 8inch fan to the other side of the lights so it is pulling the air over them instead of pushing for one. Though is that just a 8inch booster or centrifuge? From what I have read inline fans have a hard time moving air that is not already being pushed by either a HVAC system or a stronger fan.Ya and ducting your A/C to the lights would help alot. I plan to pull air from my A/C in the summer months for my 600w cooltube setup.

Do you not have any intake fans just for the garden to get some air in it when the a/c is not running?

Looks like your carbon filter has air being pushed through it instead of being pulled, is that correct?

Also looks like where the blue duct starts is 6 inch then going around a corner to a 10 inch if thats right you should be going to 10 right away even a short run of 6 inch ducting would cause constriction, slowing down airflow, I can't really see your set up but the fewer 90's you have in your system the better the airflow would be. One last thought is if you have 2-6 inch pipes running exhaust into a third the third has to be larger to accomodate the doubling of the previous 2 pipes, I do not believe you have to go to a 12 inch duct but it does have to be larger accomate the flow of the other 2 ducts leading into it.

the simple way, if you want any cool tube/hoods in between put them between your filter and ventilation or run them in a sealed string and run another for air/odor

first, your air conditioner is pumping out exhaust air under positive pressure. it's going to dominate the exhaust flow. second your 'y' pipes are causing a major 360 degree airflow from your flower room and a 270 degree airflow out of your grow room. your inline 6" fan isn't effective at all...it's just pumping the positive air pressure from the ac unit out to the roof.

what you should probably do is separate the exhaust from the ac unit and your grow rooms and feed them outside separately.
but at the very least do this:


the ac unit is still gonna dominate the exhaust flow, but you have much less airflow direction change going on. i'd put a 6" inline fan on each growroom exhaust before it hits the main 8" exhaust line to give yourself positive pressure out of your grow rooms.

another thing...if your venting directly into your attic, don't. the moist warm air will cause mold over time and create real problems, such as structural damage and sick air.