I have a tent 60x60x140 cm, and in output a carbon filter (and made refilled, could I filled to much?) inside the tent and outside an axial in-line fan VENTS 100 VKO1k turbo, Maximum capacity - 137 m3/h. A friend say me that probably is not enough.
0.6x0.6x1.4=0.5m3
0.5x30=15m3 that clears air every 2 mins.
15x2=30m3 that allows for heat off light.
30x1.5=45m3 that allows for bends and carbon filter.
Minimum air flow to clear the air in the tent every 2 mins is 45m3/hr.
Minimum air flow to clear tent every minute is 90m3/hr.
Minimum air flow to clear tent every 30 sec is 180m3/hr.
Your fan is probably just about right at 137m3/hr to learn the air every 45 seconds.
As it was said. You don't need 2 intakes running. Y ppl use an intake + exhaust is to only take pressure off your exhaust.
If you just run a bit of ducting or leaf a vent window half open you will have good air intake while holding a N seal..
Good luck
that fan is enough for a 60x60 tent. you dont need an intake fan at all imo. i use a similar capacity fan in 2 60x60 on a single extraction line. 1 fan for 2 tents.
It should be enough. The other fan i would have at the intake sock sucking air into the tent. So long as the input fan isn't as fast as your extraction fan you should still be able keep negative pressure.