How often to run exhaust fan in grow tent with led?

24/7. Need it for flow and vpd control

if it has a 0-100% or 10-100 power control, then just run it low the entire time.... a little negative pressure can avoid smell leaks, combined with carbon filter. Figure it keeps the atmosphere the same as outside the tent relative to rate of transpiration. no ebb and flow of co2 that way. probably doesn't need much at all.. 10-25%? if yo udon't have an "EC" motor, then the intermittent option might be better as those can't go below 75% power.

Hola !!!! Si no tienes problemas de temperatura ni humedad lo puedes poner con una frecuencia de 15 minutos por hora. Suerte