Ways to deal with high humidity in sealed room with co2

Bob Smith said:

No.

If you have a sealed room, it's a sealed room.

No air in, no air out.............if he's running a filter, he's scrubbing the air and it's recirculating in the room.


Not sure how so many people are failing to grasp the concept of a sealed room.

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Thats how I do it, this post^^^ is right.. Your plants munch on the Co2 in turn they produce brand new fresh oxygen! Scrubber running 24/7 = what ever stale air exists in the room gets scrubbed and cleaned.

Just curious how the odors are with a sealed room (just outside the room)? Do the odors permeate out of the room?

AdvancedNewbie said:

Just curious how the odors are with a sealed room (just outside the room)? Do the odors permeate out of the room?

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Only when you open the door. But if you're also running a scrubber in the room, it's minimal.

AdvancedNewbie said:

Just curious how the odors are with a sealed room (just outside the room)? Do the odors permeate out of the room?

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They did with mine (so clearly it wasn't as sealed as it could've been - first to admit, I'm not carpenter).

Forced me to change to the hybrid system I have now.

AdvancedNewbie said:

Just curious how the odors are with a sealed room (just outside the room)? Do the odors permeate out of the room?

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I ran a real stinky strain once that got so bad even with a scrubber and an ozone gen that I could smell it outside when I drove up. Pulled it 2 weeks early it got so bad. I have never experienced any high odor strains since and don't smell anything when I walk into the room. Once I move things around a bit watering etc... it gets smelly. So I can definately tell if someone has been in there.

@Bob, Kite, others-
I can't speak for others, but personally I don't fully comprehend the concept becuase all of the books gloss over the CO2 and ventiliation without outlining the specifics and everyone on the forums seems to have a different opinion and setup. Trying to get it; have a heart guys, not all of us are Pros.

I'm here trying to learn.

Sorry man, didn't mean to come across as a dick.

A sealed room is just what the name implies; no air in, no air out. Since plants need CO2 for photosynthesis, it must be supplemented in a sealed room.

This hobby of ours has evolved. when people first started using co2, it was to supplement a vented room. Turn off the fans and drizzle co2 from a hose above the plants keeping it there as long as the temps or humidity stayed under control. Once the enviroment becomes to hot or humid, the co2 is turned off and the ventalation system is engaged. This technique is still used by many with great success. CAP makes a few controllers that are made to do this for you automatically.

Some people will seal things up and run co2 with an airconditioner and then vent out the humidity once it crosses over a threshold. And then there are those of us that are completely sealed and have mechanical means to control all of the environment.

The best way to do it is what works for your situation. Believe me it is hard to pay for AC when there's snow on the ground, so you have to decide your own level of commitment. But there is no need to vent if you have a true CEA system.

I hope this helps clear it up.

Jersey'sFinest said:

@Bob, Kite, others-
I can't speak for others, but personally I don't fully comprehend the concept becuase all of the books gloss over the CO2 and ventiliation without outlining the specifics and everyone on the forums seems to have a different opinion and setup. Trying to get it; have a heart guys, not all of us are Pros.

I'm here trying to learn.

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Now a days growers run something called " C.E.A " which means Controlled Environment Agriculture. With modern technology and the upgrades to AC units you dont have to bring any fresh air in. Your plants and your AC unit are providing the new air for your garden, its basically that simple, also a scrubber running 24/7 is cleaning the rest of the old air.

hellraizer30 said:

I think you got it rong! Its a revolving circle co2 machine provides co2 that plant uptake, then discharge oxygen!
with good air movment and co2 you should never do a air sxchange!

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is this how you truely feel? disregarding comment you where commenting on. i like to refresh with fresh air 5x a day and all night, for several reasons but the key ones being a night fresh air will lower temps and prevent a build up of co2 overnight that might go out of optimum range with my morning injection(i dont have a montor/ controler i used to seal 100% and do leak test with the little glass tester, depending on the size of the room and amount of plants would change the times that co2 that was injected) the other reason is because of the high humidity, even with fresh air exchange i still use a dehu and my fan for my lights get tons of condensation(i actually put a plant with perlite underneath, DIY drip lol) my3rd and most important reason is it makes the plants harier making for denser faster maturing bud(?Etheline? gas(hormone) will build up without the exchange of air slowing down ripening time but increasing yeild, in addition to the effects of co2)

so ever rethink air exchange? i had some deep thoughts on 100% sealed when i had the money to buy a controller, so i ran my room 80% sealed since thenwith better results.(well maybe not better but differ in ways that i like, such as faster harvest times, not havint to tube my airpumps out of the tent, not worring about co2 overdose, well a lot of things envormentally, but if i was going for straight Yeild, like big ass pop can stalk plants, i would do 100% sealed but it takes SOOOOOOO long to ripen when they get that big and are in a 100% sealed room. just my exp and input on that..

back to dealing with humidity. i run my fan to cool my lights from a source of cold air this builds up condensation on the ducting and has a dehumidifying effect.

Damp rid works but has a short lived life, best for those corners where you are worried about mold.

putting the wall of your tent up against another wall outside of the tent it will cause condensation to build up on the wall and it can be wiped off.

Would you fellas please suggest your favorite/preferred Environmental Controllers and CO2 Generators? Thanks...

I use the Sentinel CHHC-1 (same as the CHHC-4, just a different colored light on the monitor) and a Marey tankless hot water heater (same as a Hydrogen watercooled CO2 generator).

I'm using a Marey 5l water heater as well. co2 is controlled by a dual beam industrial telaire unit with a digigro brand. Temp is controlled by the window shaker AC internal thermostat and humidity is set on the dehuey to come on at night. I have an environmental controller built into my powerpanel. I purchased this from digigrow as well. It interfaces with my co2 controller. I can switch four 20 amp outlets based on time, temp, humidity, co2 an open door etc.. It sends emails, has a webserver built in and can be controlled over the web. Only problem is the temp and humidity sensors are not very accurate and it's a bitch to program if you don't do very often. i actually received a refund on it but was allowed to keep it. I understand they only built a handul of them. I currently use it to monitor things on my iphone and as a really killer timer/power center with high temp cutoff.

umm lowes timers? lol. no i would go with a sentinel.

Budley, I like the cut of your jib

Don't have control over any of my functions remotely, but I can certainly see them (only temp and RH):

I actually don't use the remote funtions since it requires an internet connection. i just have it plugged into a wifi router so I can access all of the goodies from my iphone when I'm in the building.

It's a nice setup. I made something similar with the arduino and vb.net; just check out my sig. How much are those digigrows?

AdvancedNewbie said:

It's a nice setup. I made something similar with the arduino and vb.net; just check out my sig. How much are those digigrows?

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I originally paid 800 dollars or it including 70 feet of 6/4 entertainment grade cable. I wasn't happy with it in the beginning and had lots of little problems. when I asked for my money back, they gave it back and let me keep it. I understand they only sold a few. So with the refund I bought their rebranded telaire 2 beam sensor. It is also my power panel/ light controller. It has 60 amps of 220 going into it.

Damn those things are expensive. Atleast they were cool about it.

the cable would have cost me almost 300 dollars by itself.