I agree if u got it use it mate.. Especially this time of year with the rot being rife and big autopot plants! Don't wanna be wasting any of our precious budz do we lolI recently added an active intake as my tent was a bit crowded, I’ve found that on bad days where RH used to sit low/mid 60s it now generally stays below 60. Not a massive difference but if you’ve got a spare fan then well worth doing in my opinion.