Ventilation Question

Newbie here –

Setting up a 4x2x5. I’m wondering about ventilation intervals and duration.

For reference, I’m running 3x autoflowers. I have a 440 CFM inline fan, 2x 300W LEDs, 1x 150W LED, 1x carbon filter, 1x fan silencer. I also have an intake fan that I have connected running simultaneous with the inline fan. How often should I run the inline fan? And for how long? The things I’ve read are all over the place. Can anyone offer insights? Much appreciated!

My fan runs 24/7 for temp and humidity control. That’s in a 2x2x4 and a 4x4x7.

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