Any tips on dehumidifieing a tent?

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reddevil6

Active Member
Hey guys just couple questions about best way to use a dehumidifier for a tent.
So I got a 25litre per day dehumidifier I haven't tried to put it in my tent yet as I've read that won't work, so I've got it in the room the tent is in the room is at 45% rh and it doesnt feel like a swamp when I walk in the r e anymore but my tent is at 65% during lights off I'm assuming it will rise when lights are on an I water them cos it always did go to about 90% before the dehumidifier was in use. It's a 5x5 tent with passive intake and 200cfm exhaust plus 3 oscillating fans in the tent.
 
MICHI-CAN

MICHI-CAN

Well-Known Member
Inside the tent or a closed room is not the issue. You need to be in the tent if RH is generally high in your locale. Unless room is sealed pretty well. I run a mini in my tent in a partially sealed room vented outside. I must set my humidity 12-20% lower at unit level than my intended canopy level. Takes a pair of hygrometers and a few days to balance. Easy afterwards.
 
BBQtoast

BBQtoast

Well-Known Member
Is your humidity reader in the tent? Put it in the room for a more accurate figure since it's the room air you are changing.
 
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reddevil6

Active Member
BBQtoast said:
Is your humidity reader in the tent? Put it in the room for a more accurate figure since it's the room air you are changing.
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It is in the tent but I took it out and left in the room which seems to sit around 50% and in the tent was 65%. lights have been on for awhile now and they have been feed, humidity jumped to 80% and the room itself is still 50%
TrippleDip said:
If you're venting enough the humidity inside the tent should be exactly the humidity outside the tent... More airflow? Intake drier air, like from your heating systems outtake or outside?
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That's What I thought but my exhaust should be exchanging the tent every minute probaly a bit over a minute with the carbon filter attached. The room it intakes from is 50% Mabey I should drop it more.
 
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BeastLebanese

Well-Known Member
Maybe you can route some ducting right to the exhaust of the dehumidifier. Might need to rig it with a box and some tape, depending on the size. That way the only air coming into the tent would be dry stuff right from the dehumidifier.
 
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BeastLebanese

Well-Known Member
I don't know if this would really work well, or if it would draw in hot air from the dehumidifier running. Just thought I'd throw the idea out there...
 
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reddevil6

Active Member
BeastLebanese said:
I don't know if this would really work well, or if it would draw in hot air from the dehumidifier running. Just thought I'd throw the idea out there...
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Cheers this was going to be my next experiment to see if it helps, as putting it in the tent is going to be a bit of a squeeze to fit plus the air comes out the top so I probaly will need to try diffuse the output so it doesn't blow directly on the plants probaly causing wind burn
 
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reddevil6

Active Member
JoeBlow5823 said:
What do you have the dehumidifier set to? You need to get the room down to 20-30%
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It's set at 45% I think the lowest setting is 30% or just continues I'll have a crack at that too see if it helps.
BeastLebanese said:
A quick google search yielded these couple pics
View attachment 4776766View attachment 4776767

Hope this helps...
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Thanks that looks nice an easy too defently worth a shot, as old mate said just have to watch my temps see how much it rises them.
 
jondamon

jondamon

Well-Known Member
reddevil6 said:
It's set at 45% I think the lowest setting is 30% or just continues I'll have a crack at that too see if it helps.

Thanks that looks nice an easy too defently worth a shot, as old mate said just have to watch my temps see how much it rises them.
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Maybe a daft question but where is your exhaust for your tent dumping it’s air?
 
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reddevil6

Active Member
jondamon said:
Maybe a daft question but where is your exhaust for your tent dumping it’s air?
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I have the duct out the window. But I feel that Mabey not all of it gets out as there is a roller shutter on the other side about 6" away which is just cracked open a little bit so the slits of the shutter are opened. But the window itself is just open enough to fit the ducting through.
 
JoeBlow5823

JoeBlow5823

Well-Known Member
reddevil6 said:
I have the duct out the window. But I feel that Mabey not all of it gets out as there is a roller shutter on the other side about 6" away which is just cracked open a little bit so the slits of the shutter are opened. But the window itself is just open enough to fit the ducting through.
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Oh if your moving air outside that dehumidifier probably wont ever be able to keep it. You can try dropping it as low as it will go but pushing air outside means outside air/humidity is coming in somewhere.
 
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reddevil6

Active Member
JoeBlow5823 said:
Oh if your moving air outside that dehumidifier probably wont ever be able to keep it. You can try dropping it as low as it will go but pushing air outside means outside air/humidity is coming in somewhere.
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Do you recemended exhausting into the room the tent is in? If So correct me if I'm wrong but that would mean I would need to try vent the room regularly right as the plants will use up all the co2 in t he room eventually?
 
JoeBlow5823

JoeBlow5823

Well-Known Member
reddevil6 said:
Do you recemended exhausting into the room the tent is in? If So correct me if I'm wrong but that would mean I would need to try vent the room regularly right as the plants will use up all the co2 in t he room eventually?
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Is the room completely sealed? Or do you have central ac/furnace? Would the room get to hot if you exhaust the air into the room the tent is in? I exhaust the grow room to the basement..... Air comes back into the grow room up through the basement, main floor, back to grow room. Helps heat the whole house and keep the grow room side especially warm.
 
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reddevil6

Active Member
The room isn't completely sealed there's a gap under the door lol that about it oh and a duct in the roof for the a.c. but it's not central a.c. it may get warm but I'm not sure, having a basement would be good
 
JoeBlow5823

JoeBlow5823

Well-Known Member
reddevil6 said:
The room isn't completely sealed there's a gap under the door lol that about it oh and a duct in the roof for the a.c. but it's not central a.c. it may get warm but I'm not sure, having a basement would be good
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Sounds like you live in a really hot place?
 
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reddevil6

Active Member
It can get really hot here hasn't been to bad so far my tents stays between 19° and 26°c at the moment and that's with the dehumidifier running the the room it was couple degrees cooler before the dehumidifier.
 
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