Humidity Part II

Rainbow Warrior

Rainbow Warrior

Well-Known Member
I'm back with more humidity questions....

Taken the advice from the Indoor gurus from the far flung corners of the universe and invested in a humidifier, albeit a cheap one.

Can’t seem to get the humidity above 45-50%, even though the thing is running 24 hours.
My girls are two weeks tomorrow, hence me wanting higher RH.

Last night I was wondering in a hazy state of mind whether turning off the exhaust fan would keep the humidity in. I figured that if you don’t suck the air out, the RH will rise...

:?:

RW
:peace:
 
Airflow is more important than the humidity levels you are dealing with imo.

I grew all winter. Little humidifier running nonstop. I was in th 30s and 40s RH. Everything was fine in every stage. Cannabis is a weed man. Don't over think it.
 
Antitheist said:
Airflow is more important than the humidity levels you are dealing with imo.

I grew all winter. Little humidifier running nonstop. I was in th 30s and 40s RH. Everything was fine in every stage. Cannabis is a weed man. Don't over think it.
Click to expand...

Thanks man!
Don’t they say that low Rh Leeds to smaller yield, or is this bullshit?
Before I turned the exhaust to 30 on 30 off rhythm, I got max 21 degrees; had light frost the last few days and 5 degree max in the daytime, do that hasn’t helped matters...
Now, with the humi going full time, and the 30/30 exhaust rhythmI average @ 26 Degrees / 53 % RH.

Would it be stupid to turn the exhaust off altogether and let the fan move the air around, hoping that the humidity would rise because the air doesn’t get sucked out? Or is the air exchange via the exhaust vital for my two week olds? I know it matters once they’re bigger....
Or should I just continue with everything running and the lower temps / Rh?

RW
:peace:
 
TintEastwood said:
Yes.
It would be better if you could control the fan speed, or use something like this inkbird to turn the fan on/off automatically.

https://www.amazon.com/Humidity-Con...bird+humidity&qid=1555160623&s=gateway&sr=8-1
Click to expand...
TintEastwood said:
Yes.
It would be better if you could control the fan speed, or use something like this inkbird to turn the fan on/off automatically.

https://www.amazon.com/Humidity-Con...bird+humidity&qid=1555160623&s=gateway&sr=8-1
Click to expand...

How does it work?
Does it shut off the exhaust when humidity to high or does it turn off the humidifier ?
 
Yes. When used with a fan, it turns the fan on if humidity higher than you set......until humidity is lowered, then it turns the fan off.

Connecting a dehumidifier is not recommended.
 
Imo get yourself an environmental controller. Set your desired temp and humidity. Hook up your humidifier to rh plug and exhaust fan to the cooling plug. It will operate them independently. There are smaller controllers that will only do rh or temp if ur looking to cut cost. But the bigger ones have night output plug and a C02 option. Since ive added one and followed a basic VPD chart ive had more vigourous veg runs and noticed yield and taste differences.
 
SNDBLOP said:
Imo get yourself an environmental controller. Set your desired temp and humidity. Hook up your humidifier to rh plug and exhaust fan to the cooling plug. It will operate them independently. There are smaller controllers that will only do rh or temp if ur looking to cut cost. But the bigger ones have night output plug and a C02 option. Since ive added one and followed a basic VPD chart ive had more vigourous veg runs and noticed yield and taste differences.
Click to expand...
How much we’re talking for an environmental controller?
 
If you want something super cheap and simple get an inkbird humidity controller.

The advantage of the autipilot, at least the one I have, is you can set it up so either heat or humidity can turn on the blower. Or you can split them and have the heat run an AC and humidity run the blower or heat can run an AC and humidity can run a dehu.
 
Rainbow Warrior said:
Jeez man, were they devised by NASA?

Joking aside, looks the business, do u use it?

RW
:peace:
Click to expand...
Lol! Good luck with your humidity. It gets tricky because your humidity can change rather quickly depending on the temps with heat and humidity outdoors even tho you grow indoors. Like my humidity went up to 80 degrees in my closet with my little humidifier on at the same level I had it run all week at 60 %(in retrospect I think was too high) it’s real humid and hot outside today. Not sure if you will ever have to worry about that where you live.
 
Rainbow Warrior said:
Don’t they say that low Rh Leeds to smaller yield, or is this bullshit?
Click to expand...
As to this, I don't think yield is effected very much. Before I added swamp coolers I had some pretty epic harvests with humidity in the low 20's. That said the plants drank a lot more. They were also stressed, my glue would toss a few late flower nanners, it doesn't anymore with the higher RH%.
 
Renfro said:
If you want something super cheap and simple get an inkbird humidity controller.

The advantage of the autipilot, at least the one I have, is you can set it up so either heat or humidity can turn on the blower. Or you can split them and have the heat run an AC and humidity run the blower or heat can run an AC and humidity can run a dehu.
Click to expand...

Renfro said:
Now if you want something truly NASA level check this puppy out:

https://hydrobuilder.com/grow-room-...MIgefLxoLY4QIVEcZkCh2l7Q7MEAQYCCABEgLHmvD_BwE
Click to expand...

I wonder if I could write a really polite letter to father Xmas, u never know...
 
Dr.Amber Trichome said:
Lol! Good luck with your humidity. It gets tricky because your humidity can change rather quickly depending on the temps with heat and humidity outdoors even tho you grow indoors. Like my humidity went up to 80 degrees in my closet with my little humidifier on at the same level I had it run all week at 60 %(in retrospect I think was too high) it’s real humid and hot outside today. Not sure if you will ever have to worry about that where you live.
Click to expand...

In uk the biggest worry is normally humidity, not heat; we average 1-2weeks of summer without rain;-)
 
If you intend to put a dehumidifier on a controller you need to make sure it restarts after a power outage. Just unplug it while it is running, wait a minute or so and plug it back in. If it comes back on and remembers it's settings then you are good to go with putting it on a controller.
 
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