So my understanding is that im veg state i want a humidity around 50%.
Im wondering if this is too high and how to drop it if necessary.
Normally it stays around 49-51, but with all the rain we’ve had lately it harder to maintain that level.
We have a little Vivosun dehumidifier in the grow room (not the box), but these #s still arent going down at all.
Suggestions, or is this acceptable?
As a matter of fact, all these #s seem a bit off - dont they?
morning growmie… those numbers are just fine for home growers…
It is fine for veg. You’ll want it a bit lower if in flowering.
Increasing airflow will help mitigate mold risk.
Okay awesome. Thank you!
(Im still learning. Theres alot to take in.)
we all are…
We have an exhaust fan set for speed 10 on constant, an intake that will kick on for 15 mins every hour at speed 3, and a couple circular fans that stay on all day and night.
I thought it was too much airflow 
When i open the tent its pretty windy in there.
“Airflow” (measured in cubic feet per minute, or CFM) is what your exhaust and intake fans provide. It refers to how quickly air flows through your tent. Your circular fans provide “circulation,” i.e., they circulate the air inside the tent.
You can reduce the tent’s humidity by increasing its temperature. Reducing the speed of your airflow fans and/or increasing your light’s intensity setting will accomplish that.
I offer that info only for future reference – I’m not contradicting the judgement of @Retiredoldguy or @MidwestGuy.
I knocked the intake down to speed 1, every 15 mins on the hour to see what it does.
I know its going to be a real challenge to keep it down during the next phase.
We have high humidity at my lat/long year round. I bought a 44 pint dehumidifier and have it sitting so it can drain into a big receptacle (old storage drawer from a fridge). This thing will deposit about gallons of water in the receptacle every 24 hours. You can feel the difference in the house when you walk in. It drops the RH about 6 points. It’s so dry in here both the wife and I get dried eye boogers when we wake.
The tent RH stays around 50 on days approaching another feeding and just after a feeding when the soil is wet, RH will jump to 55-56. Still where I want it
Is there a reason you want the intake fan turning on and off at a specific time interval? At speed 1, it won’t make a big difference, but in general, having things turn on and off without regard for the atmospheric conditions in the tent makes those conditions fluctuate unnecessarily.
If it was me, I’d use your controller to have the exhaust and intake fans turn on when the temperature reaches an upper limit – say, 87°. I’d also try a lower speed for the exhaust.
I assume you know that tapping on any of the readings in your controller’s main display will bring up graphs that show how temperature, etc. have varied over time. I like to see graphs that have very small excursions up or down, which means conditions in the tent are very stable.
Increasing your circulation fans’ speed would improve stability, too, by constantly mixing the air and reducing stratification.
meant to say “deposit 3 gallons of water in 24 hours”
I had the intake running at constant to keep fresh air coming into the tent at all times.
Should i have it running on an automatic setting?
Im making adjustments right now - the exhaust running at 1 standby and 5 when it hits the highs and lows.
Its such a delicate balance.
I do ALL my environment controlling with lung room anymore. No intake fan. Just exhaust with intake passive. Your environment numbers are spot on for us home growers. We are limited in what we can actually control in non sealed environment. Rock on.
Sorry – I didn’t mean to suggest that you need to change anything (although that’s what I did). More expert folks have said your numbers are fine as they are.
I meant only to describe how to make better use of your controller’s capabilities to maintain a stable environment in your tent.
