Advice on Air Exchange in 4x4

Chefman86

Member
I have a 4x4x80 tent setup with (2) 1000watt phlizon cree cob LED lights. AC infinity T6 that is pulling air out of my tent. I have a carbon filter, but I am not attaching it until I hit flower. At the other side of my tent at the bottom (opposite my exhaust fan) I have a HEPA shop vac air filter with a ducting convertor that goes from 4" to 6". Then a piece of 6" ducitng that is going into the bottom porthole of my tent for intake. I don't have a intake fan as I thought the T6 would be sufficient enough to pull in air from the bottom. I am running the AC infinity in Auto Mode and have the fan speed set at 7.
My temp hovers at 81-83 degrees and RH is 55%.
I am concerned bc I don't have the lights on full power, just the one veg setting switch on and not the cree cobs on both lights.
Where I am keeping the tent is in the basement and the ambient temperature is 75-79F.
Am I doing something wrong as I am getting alot of negative pressure in my tent. Is that just the T6 doing its job? I don't have any portholes or vents open as I wanted to filter everything through the HEPA filter intake.
Here are some pictures of my setup. Any advice is greatly appreciated.
View attachment 4638133
 

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