Reply To: Air circulation

[Alex-Arafat]

Welcome to growing! You don’t need an intake fan if your inline fan is creating enough negative pressure (walls sucking in slightly = good airflow). That said, I learned airflow the hard way—my first grow got as steamy as a granules for hot tub spillover because I skipped passive intake vents! Now I use the oscillating fan low near seedlings and keep my tent flaps slightly open at the bottom (like how you’d balance granules for hot tub pH—small adjustments matter). Watch those leaves; they’ll tell you if airflow’s off!