Did my humidity increase because the plant grew ?

Star Dog

Star Dog

Well-Known Member
I've found constant extraction to be the best all round solution to heat and humidity, the UK rh% is usually between 70/85% so trying to get below that at light out without heating and something removing moisture is near impossible.
I think a dehum is a must have for any UK grower due to our ave rh%, but it also adds heat to the tent my 5x5 at light out is 52/56% 19/21c using a 160w dehum with the extraction fan idling at around 10/12%
 
Trickyticky

Trickyticky

Well-Known Member
Stoned Whale said:
How long do these things last before just being full of water?
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Would depend on the moisture in the air really but these will probs last a while , they been in 2 weeks and very little water in bottom . I'll put a pic of both tonight when light comes on . They help keep humidity between 45-60% at all times :)
 
Dontjudgeme

Dontjudgeme

Well-Known Member
Jettman1 said:
Hello,
I need some guidance. I suddenly have a humidity problem 11 days into flower... what changed?
is it because it got bigger?
Also, it’s been like that for 2 days, I got exhaust fans sucking air like crazy but it won’t go down, do I need more fans inside the tent swirling the air around inside?
I tried raising the heat in the room the tent is in, but the humidity didn’t go down.
Why’s this happening... what can I do?
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If your exhaust is running at night and bringing humid air inside of an already humid tent, good luck with controlling humidity. With your lights off it’s natural for the humidity to rise, and should be expected, this is where a dehuey will come into play. If your exhaust is set up to a controller, once the temps drop down, the exhaust should shut off at the temp you set it at, and now the dehuey is working the air in the tent. A dehuey inside a tent with the exhaust on is just dehumidifying the room the tent is in, not exactly what you’re trying to do, unless the dehuey is big enough to control a room, at that point the dehuey being in the tent is pointless. A 2.5x2.5 tent is relatively easy to control. Just get yourself a dehuey and you’ll be ok.
 
J

Jettman1

Active Member
Dontjudgeme said:
If your exhaust is running at night and bringing humid air inside of an already humid tent, good luck with controlling humidity. With your lights off it’s natural for the humidity to rise, and should be expected, this is where a dehuey will come into play. If your exhaust is set up to a controller, once the temps drop down, the exhaust should shut off at the temp you set it at, and now the dehuey is working the air in the tent. A dehuey inside a tent with the exhaust on is just dehumidifying the room the tent is in, not exactly what you’re trying to do, unless the dehuey is big enough to control a room, at that point the dehuey being in the tent is pointless. A 2.5x2.5 tent is relatively easy to control. Just get yourself a dehuey and you’ll be ok.
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Ok.. so, Run the huey with the exhaust off.
Do I kept the intake fan running?
Also, there’s two 6” fans inside the tent pointed upwards blowing the heat away from plant, keep these running too ?
 
Star Dog

Star Dog

Well-Known Member
Jettman1 said:
I have two 6 inch clip on fans blowing air upward away from plant on 24/7 as well as one intake fan.
the fans are not oscillating.
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Are you pulling air through the tent with an extraction fan?
Ideally you want to keep air moving through the tent, even better with a dehumidifier or heater rh% isn't a fight your going to win in the UK without one.
 
J

Jettman1

Active Member
Star Dog said:
Are you pulling air through the tent with an extraction fan?
Ideally you want to keep air moving through the tent, even better with a dehumidifier or heater rh% isn't a fight your going to win in the UK without one.
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Using an exhaust fan as an intake Fan at bottom of tent.
 
J

Jettman1

Active Member
ThewBerg said:
Are you sure the inline fans are sucking the air out of your tent properly? Make sure the tent has negative pressure when shut.
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When I reduce the speed of the intake fan the walls of the tent suck in, so I assume it’s sucking air, I can feel the air blowing out.
 
Star Dog

Star Dog

Well-Known Member
Jettman1 said:
Using an exhaust fan as an intake Fan at bottom of tent.
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Sorry I'm not with you, an exhaust as an intake?
Is it blowing air in or sucking air out, you need to extract air out of the tent.

The small dehum will help there's 2 different types, 1 has a compreser like a mini fridge they work great the one I use is only 160w
There's another type that use a condenser plate they're normally around 10w but aren't anything as good as the compreser type, the compreser type also gives of heat my £50 dehum from bq heats and dehumidifies my 5x5.
 
J

Jettman1

Active Member
Star Dog said:
Sorry I'm not with you, an exhaust as an intake?
Is it blowing air in or sucking air out, you need to extract air out of the tent.

The small dehum will help there's 2 different types, 1 has a compreser like a mini fridge they work great the one I use is only 160w
There's another type that use a condenser plate they're normally around 10w but aren't anything as good as the compreser type, the compreser type also gives of heat my £50 dehum from bq heats and dehumidifies my 5x5.
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What brand is the dehumidifier that you like, or what specs does it have that I find it online.
All the dehumidifiers I see are either too big for a tent or they are small like the tiny one in the picture.
 

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J

Jettman1

Active Member
Star Dog said:
Sorry I'm not with you, an exhaust as an intake?
Is it blowing air in or sucking air out, you need to extract air out of the tent.

The small dehum will help there's 2 different types, 1 has a compreser like a mini fridge they work great the one I use is only 160w
There's another type that use a condenser plate they're normally around 10w but aren't anything as good as the compreser type, the compreser type also gives of heat my £50 dehum from bq heats and dehumidifies my 5x5.
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Sorry if I wasn’t clear.
I have two 4inch inline fans and one Booster fan. With two regular fans circulating air inside tent.
1 inline fan is blowing air into the tent, at bottom.
1 inline fan at top extracting air.
1 inline booster fan at top also extracting air.
(When I starter having humidity issues I added the booster fan as a second extraction fan.)
Both extraction fans are connected to carbon filters.
 
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