Humidity Problem. Please Help ASAP

[LandscapeEscape]

My rH is 74% and my temp is 78*. My mylar is sweating, and my girls are getting very soft and floppy.

12x11 room. I have a 14,000 BTU AC running at 75*. I have four 1k lights with a 6in pushing air through and out. The room right now is 98% sealed. Very little leaks. I woke up this morning and the outside temperature was in the high 20's and low 30's. I turned the AC off so i didn't ruin it, and cut power to 2 of the lights to try to manage the heat. Set the thermostat to 65. Came back from work at 9 (8.5 hours later), my temp was 85 and humidity was almost 80. The connecting hallway and kitchen were just as humid. The local temp has been pretty consistently at 35* and no other factors really occurred to make this change. A humidifier is at the top of my "to buy" list but unfortunately i don't have one right now and all the stores are closed.

Can anyone suggest the best way to lower the rH? I want to turn the other lights back on, but it's going to spike the temp, which will probably raise the humidity.

 

[TribalSeeds]

What do you mean very little leaks? In the room itself or in your duct work? Are you cooling all those lights with 1 6" fan? I wouldn't do a single 1k with 6". Did you say the fan is pushing and not sucking? What's your reason for doing it that way?
Also, are you going between celcius and fahrenheit? If not, you have a much bigger problem than RH.
Its not a humidifier you want. You're gonna need a dehumidifier. If your room is 75% RH, the dehuey is gonna be blowing out air that's 100+ degrees.
Fix your light cooling problem and get yourself an electrition to wire in a thermostat to shut off the lights if it ever gets too hot.
Cheers

 

[LandscapeEscape]

I mean the room itself has very little leaks. it's a sealed room that gets fed C02 through a tank. The duct work is sealed. And yes i'm cooling all the lights with one 6" fan. Once i get more funds i will be upgrading that but it's the best i can do right now :/ I am pushing air (i know it's less efficient) because of odor issues. i don't want to suck dirty air out, as well as lose C02. (nosy neighbors)

i'm not going between celcius and fahrenheit. I am speaking strictly in F. I live in a cold climate so the outside temp is bouncing right above freezing right now.

I apologize, i meant to type Dehumidifier.

I'm aware that my fans desperately need an upgrade, and i will consider the thermostat, but what i'm more concerned with right now is why my rH went sky high all of a sudden. All of this week this room has been running at 50% rH, 75* and 1500pm PERFECTLY. I have a sentinel chhc-1 controlling this. I can't figure out what i changed to spike the rH so radically. I know this is my fault, i just dont know what i did. fahk.

 

[TribalSeeds]

I've had RH spikes when I moved my lights and had leaks in my ducts. Sometimes they get pulled and come lose. Your co2 stays 1500at perfect though..
If you stick a dehuey in there its gonna get so hot your plants will die.

 

[LandscapeEscape]

Thanks Tribal, i really appreciate the feedback. I'll start with the vents and see where they take me.

 

[crisscross]

I live in a dry hot climate where humidity is rarely a problem. I have a hygrometer and I've noticed that the only time I have had spikes in humidity is when I spill some liquid on the floor. What I've read is that in order for an a/c unit to work the humidity must be removed. That's why pipes sweat outside or the box a/c unit drips into a tray often. Turn the light and fans on and open the doors and do a complete air exchange.

 

[jammie]

i don't think you have a humidity problem, just a temperature and air circulation problem. condensation occurs because of a drop in temp ( cooler air hold less moisture) and poor air circulation. check out my favorite site for proper temp/humidity:http://www.autogrow.com/1_information/1_vpd/info_vpd.html

 

[HUGE]

If you really want to run 4k sealed you are going I need to spend atleast 1,000 on a dehuy. A fully running 4k setup will dehumidify somewhere between 5 and 10 gallons of water a day. And to cool those lights you will need atleast 1600-2000 cfm. Anything less I aking for crop failure.

 

[HUGE]

Also you will need much more AC capacity when summer hits.

 

[MIway]

best way is to open up the sealed room... exchage the air out... will make a noticeable difference right away.

next thing, if keeping it closed... fire all the lights & add a space heater to force your a/c to cycle continuously... it removes a lot of water during normal operation, so force it to run constantly. bump the temps to 80-82F as well... will hold more water in the air at higher temps, so the rh drops... and it will help force the a/c to cycle.

 

[LandscapeEscape]

Changed the air out and that helped a lot. I've spotted the problem in regards to what Jamie said about drops in temp. My RH only jumps around when I turn the AC off and on. Its a problem I'm gonna have to deal with but at least its not constant. Humidifier is comming in today and this will definitely help keep things in check.

Decided against the thermostat, I don't want to risk upsetting my light cycles, and seeing as my RH peaks when the AC and lights kick off, this may prove counterproductive.

Miway, I definitely see what your saying and this would certainly solve the RH but my temps need to stay as close to 75 as possible. The girls that I'm running love the cool air, so I'm going to try to balance the RH with a smaller dehumidifier, as well as exchanging air when its necessary to turn the AC off. Ill spend a little more on CO2 but that's the least of my worries lol

 

[LandscapeEscape]

Things are back to normal, my rH finally dropped below 60. Rock solid at 50%. Ended up grabbing a second dehuey and thanks to the warmer weather i no longer have to turn the AC off. Set the timers to 12/12 today so the girls are flipped. Some of the strains i'm running i have yet to try, so saying im excited to see the bloom is a huge understatement haha