dehumidifier didnt help me at all :(

[charlesweedmore]

i bought a 20L dehumidifier and i have a split AC unit .i use AC at DRY mode. dehumidifier also works consistently .although that,RH dont down at all. Humidity is between 55-65 % and i am 5. week of flowering .

i have a grow tent ( 120cm X 120cm X200cm ) with an active intake and a exhaust .i use 600W hps.exhaust fan extract the air from inside of tent to outside of my house .

i put the dehuey in another room because it produce heat and as i said there is a split AC unit in same room .intake fan pulls treated air from this room.

DEhumidifier work well because i pour water tank of dehuey ( it is 5 Litre ) 2 or 3 times in a day but RH still dont decrease

 

[pontiac]

That's just weird... I suggest you get another RH meter to make sure your current one isn't screwy.

 

[charlesweedmore]

i tried but the result was same. i dont know what the porblem is .

 

[sparkjumper]

Are you pulling gallons of water out of your dehumidifier daily?If not somethings wrong

 

[NOYB]

i have a grow tent ( 120cm X 120cm X200cm ) with an active intake and a exhaust .i use 600W hps.exhaust fan extract the air from inside of tent to outside of my house .

i put the dehuey in another room because it produce heat and as i said there is a split AC unit in same room .intake fan pulls treated air from this room.

DEhumidifier work well because i pour water tank of dehuey ( it is 5 Litre ) 2 or 3 times in a day but RH still dont decrease

If I'm understanding your setup correctly you're trying to dehumidify flowing air because you have an open system and that dehumidifier will do nothing for RH. Only way it will work is if you run a dehumidifier in a closed system or in an open system lights off and turn off your ventilation. Only things important to control lights off is humidity and temps.

 

[charlesweedmore]

i am pulling 10 litre water in a day from dehuey.
And yes, it is an open system .
1 ) i have a grow tent with 1 extractor and 1 active intake fan
2 ) the tent in a room.

i cannot put dehuey in the tent because of heat and space problems.

 

[NOYB]

Well...going back to your thread title I answered why it's not working. I think you should just unplug it and save electricity. Humidity issues can come from inadequate ventilation through a space but sounds like you're in good shape with an intake and exhaust fan. You'd probably need to have an air exchange well under a minute though to alleviate any humidity issues within a confined space like a tent if the RH is higher than the incoming air.

 

[charlesweedmore]

no bro, outside humidity is very high ,too. outsideRH is over 80% .
i dont want to turn off ventilation fans at nights because i dont want any fungus,mildew and budrot.

cant i use the dehuey in my open system ? i dont know why it doesnt work, because its air capacity is 200m3/h and air capacity of the intake fan is 300m3 / h. there is not too much difference.

it doesnt work properly although it pulls 15 litre water daily .

 

[McChris421]

maybe try a large carbon scrubber that recirculates air in the room that houses the tent. just a thought...good luck


-McChris-

 

[Dank Sinatra]

How many cubic feet is the total ventilated area, not just the tent but the lung too. maybe its so big that while your dehumidfier is taking water out, its a relatively low amount.

Is the room the tent is in open to the rest of the house? what is the RH in the rest of the house? I know you said the RH is 80% outside......

 

[Dank Sinatra]

maybe try a large carbon scrubber that recirculates air in the room that houses the tent. just a thought...good luck


-McChris-

I know i am going to sound like a dick, But, could you explain you logic on how this will reduce Humidity?


Did you see any drop in % of RH at all after the addition of the dehumidifier

 

[charlesweedmore]

How many cubic feet is the total ventilated area, not just the tent but the lung too. maybe its so big that while your dehumidfier is taking water out, its a relatively low amount.

Is the room the tent is in open to the rest of the house? what is the RH in the rest of the house? I know you said the RH is 80% outside......

my tent is in a 50m2 room. in fact , i seal the room at nights, but i keep a window open . but it is not a real sealed room, because the exhaust fan extracts the air outside of the house.

RH is lower than outside in my house, it is around 60- 70 % at nights .

 

[Lazyman]

maybe try a large carbon scrubber that recirculates air in the room that houses the tent. just a thought...good luck


-McChris-

Sadly, all this would do is probably ruin a perfectly good carbon filter. They only work well when RH is below 50%, above that and you're slowly killing them with water.

 

[greaserchrist]

i live in a dry state so i use a humidifier, is that not good, i also run fans in & out of grow room, what's the ave. % humidity i should want, it seems like there taken 4ever 2 grow

 

[Guest 18340]

Either I'm fucked up over here (and I am) or the problem here is pretty obvious.
Correct me if I'm wrong; You have a tent and in that tent is a split ac unit, a 600w light being cooled by a fan that sucks the air from the tent, thru the light and out a vent.
And you have an active intake as well, meaning a fan is blowing air into the tent? And an active exhaust? Or just the air being sucked from the tent thru your light? Either way, you're constantly exchanging the air in your tent, not giving the ac enough time to pull moisture from the air. I have a 900btu split unit in a 8x5 room and I dont even need to put it on dry mode to keep rh in check.
The dehuey you have is not bringing the rh down enough in the other room and your moving it in/out of the tent before the dry mode can be effective.
Seal your tent.
Cool your light by using flex tube from the intake to the lamp, from lamp to fan and out. Then your ac will cool your tent and keep rh down no prob.

 

[NOYB]

no bro, outside humidity is very high ,too. outsideRH is over 80% .
i dont want to turn off ventilation fans at nights because i dont want any fungus,mildew and budrot.

Usually the RH inside a house is less than outside in conditions like that if you have the house sealed off and are running an AC in summer or heater in winter. I had one room where it would be pouring down rain and foggy outside yet the humidity in my open system with an air exchange about every 60 seconds or less and it never went over 55%. My intakes were pulling in air direct from outside also. There were a few reasons why my RH was that low compared to the outside but does not apply to your setup.

Check the RH of the air before it enters the tent just to know what the story is there. I'm talking inside house air. Check it before it hits the room with the dehuey in it and in the room with the tent before it enters the tent.

If you shut ventilation fans off at 'night' and use the dehuey it will reduce RH, if properly sized, and basically eliminate any rot issues. My experience with PM is it's more RH dependent and not air exchange dependent. You said you don't have enough room in your tent anyway so not an option.

wont i use the dehuey in my open system ? i dont know why it doesnt work, because its air capacity is 200m3/h and air capacity of the intake fan is 300m3 / h. there is not too much difference.

it doesnt work properly although it pulls 15 litre water daily .

A dehuey in an open system plain and simply does not work unless used like I said. They are effective in a closed environment. If you are constantly bringing in humid air it will not keep up. You can't look at the air capacity thing here the way you compared it cause not really relevant. If you want to, for starters, the intake fan is pulling in 50% more air than the dehuey can circulate...and that's one of the things that makes a dehuey effective is because it RECIRCULATES the air and is not designed to be used as an inline or single pass system like your trying. The other thing you are not considering in your comparison is the amount of water your dehuey can collect per hour compared to how much water is in the air you are pulling through your space per hour.

If your dehuey is sitting in the room next to the room that actually has the grow tent you have a lot of air passing through the space that will never come in contact with the dehuey. Sure it will pull moisture from the air but it's impact on the RH of the air that passes through your grow tent will be negligible at best. Put the dehuey outside and it will fill up yet will do nothing to the RH outside...lol...you're basically trying to do the same thing.

Hopefully a little light will go off in your head now...

 

[McChris421]

I know i am going to sound like a dick, But, could you explain you logic on how this will reduce Humidity?

i have always heard that when you add scrubers it lowers humidity....mine seemed to lower the humidity by about 20 % from 60 to 40. maybe something else did this and i just credited the carbon scrubber. sorry if the advice is bad.

-McChris-

 

[Pirate]

I've had my RH as low as 35% and still got a shit load of PM in a seal room.
.
.

 

[charlesweedmore]

hey again guys ,

i sealed the room where the tent in it and i am extracting to same room . i have been doing this just for 2 hours but humidity dropped to 40 % while being over 75 outside

i have heat issues now but i have no other option .
i will turn off the dehuey at daytime and i'll open all windows during lights are on. i will only run the dehuey at nights.

i think i did it !

however, i read that " extract to same room is not good idea " so i was extracting to outside of building .but while doing this, treated ( dehumidified ) air went to outside of house as well .


can i extract same room ,where the grow tent is in , unless there are high humidity and excessive heat problems ? that may cause powdered mildew or budrot , as pirate said above ?

 

[charlesweedmore]

but night time humidity is lower than daytime ,is it a problem ?