Growbig420420
Active Member
Quick question. Do dehumidifiers work better when in line with the actual bush of the plant? I had a humidity issue and got 2 dehumidifiers placed on the floor but they're doing practically nothing.
Dehumidifier
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Growbig420420
Active Member
Cannabinoidcarson33
Member
Same here, I had to return the small one I originally bought and had to get a 50pint. I got the Vermi 50pint and it kicks ass in my 4x4. The only thing is, it does vent out WARM air, so either be ready for a temp increase or do what I did and vent it out. I made a box that attaches to the exhaust of the dehumidifier with 6 inch ducting and it vents into a 6 inch carbon filter. Works great, but it was like 300$. Worth it, but a bit expensive if you're on a tight budget. Good luck!
Cannabinoidcarson33
Member
You can see the dehumidifier and the box with the ducting I made to vent out. This pic is a bit old, and since I got a 6inch carbon filter and connected it on the outside. If you don't use a a second filter for the dehumidifier and vent out, it WILL STINK, and make your first filter useless. This thing DOES keep the humidity down though.
My humidity was at 70-85% regularly and now I can keep it at anywhere from 35% and up if needed. Hope it helped!
Here is a pic of my garden TODAY..
PJ Diaz
Well-Known Member
A 50-pint uses what, around 600watts? It shouldn't be a surprise to see increased heat with increased wattage. 1watt = 3.41 btu's.
That dehumidifier you have is a joke, return it if you can and get something decent. I personally put my dehuey outside of my tent, as I have a "lung room" for my tent.
PJ Diaz
Well-Known Member
I don't understand. If you vent out from the dehuey, aren't you just sending all of your dehumidified air away?
Cannabinoidcarson33
Member
It's absolutely no surprise about the heat, that's how most of them work, I believe...
But anyways, lol, yeah it pulls 570watts . My lights are only 480w so that seems pretty crazy now that I think about it but I guess it's the price I pay to play God and control the environment in the grow tent...
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Cannabinoidcarson33
Member
I have a Vermi, but yeah, Its sucking all the humid air out of the tent and the dehumidified warm air is vented out into the room where the intake eventually sucks it back in after it has cooled off a bit... I tried having it in the tent and couldn't keep the temps down. I also tried it fully outside the tent and the humidity just wouldn't get below 58%, so I put it in and vented out and undoubtedly got the best outcome for my setup.
I don't know if its the best setup, but I do know it works WELL, so I do it
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PJ Diaz
Well-Known Member
Yeah, mine pulls about the same wattage, but it's not running constantly either. I use mine outside of the tent, and generally set it for 5 to 10 RH lower than my max target RH (ie: if I want 50rh max in the tent, I set the dehuey for 40 rh). In that situation, my dehuey will run at max wattage until it gets down to 40rh, then it will go into idle mode until it hits 45rh and turn back on again, so the average wattage is much lower than peak wattage.
I also often don't use my dehumidifier until later in flower, as the plants love high rh during the first half of the flower cycle.
How high does your heat get? Since you are growing with LEDs high heat can some times be a good thing compared to HPS lighting.
What's wrong with 58% humidity?
PJ Diaz
Well-Known Member
In late flower, it could be riding the razor's edge towards botrytis.
kingromano
Well-Known Member
with good air circulation you shuldnt get botrytis at 58% RH
but its not optimal in late flower
but its not optimal in late flower
PJ Diaz
Well-Known Member
Like I said, you're walking the razor's edge. I've done full runs with no dehumidification; it's possible, but I wouldn't suggest it.
kingromano
Well-Known Member
yes i prefer 40%. better result with dryier air end bloom too
I can't get my humidity that low in my sealed room when it's choking and nearly ready. Gets down to 60 - 65% and I rarely get Botrytis. Yields would be nowhere near what they are if my humidity was down at 40%.
I do get what you are saying though, but with good airflow most strains should be fine at 58 - 60%.