exhaust problem

I have a 4 x 5 x 8 home made tent with 1000 watt light 6 inch 435 cfm exhaust fan I also have a window ac

how long and how often do I have exhaust the room
if I leave the fan on all the time it pulls out of the cold air from the ac the temperature runs 90 degrees with the exhaust fan and ac on all the time if I turn off the fan it runs around 80 to 85 I want to make sure I have enough ventilation so I don't get mold or powder mildew

do you have an intake fan?
also if you post pics we can give better recamendations..

make sure ur getting the hot air out of the room.it made a huge differnce in my tent.

The easiest solution is to invest in a temp/humidity controller, set your temp and fan speeds and boom, your running, it will run your fans till temp and humidity is at your desired level then cutoff. eliminates manual checking. Good luck.

If I run the exhaust fan it seems to get hotter cuz it pulls he cool air from the ac out do I have to run the fan at. all times

Nope, with an Ac you will only need to ventilate like once an hour for maybe 5 mins… More than sufficient for an air exchange in a 4 x 5 x 8 tent…
Happy Growing!