Mcmc631
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Sweet I have an autopilot controller that I’ll be using, there’s just so many mixed reviews on venting and not venting the grow rooom after lights out. I heard running a small slight stream of fresh air is also most beneficial.. calling it a hybrid sealed room? Defeats the purpose if you ask me. I just finished with my vapor barrier boards on wall oneMain purpose to seal a grow room is to control effectively your co2 level without loosing content. You need a titan co2 controller, it controls output with lights on and shuts it off with lights out.
I have used this controller effectively for years.
There is no need for fresh air intake during lights out. I have never had any issues.
Main thing is controlling your temperature when the lights are out and obviously when lights are on.
Humidity is exactly the reason I'm adding exhaust back into my room. Are you in a generally dry climate? Reason I ask is my room is a similar size, but my dehumidifier is not and I'll take any opportunity I can for it to run less. What size is that dehu?I run a sealed flower room also and usually start my co2 around 1200 ppm's when I first flip to flower then increase to 1500 ppm's by the end of the week or during the second week of flower. As far as the Co2 spiking and needing to vent or add fresh air throughout the night if you have an exhaust fan then there is no need IMO. I know you said you have a scrubber in there, but does it exhaust or do you have an exhaust fan setup in the room? If not I would definitely think about adding one or instead of just scrubbing the air I would use that as an exhaust fan/scrubber instead. In my opinion the only reason you would need a scrubber is to help keep the smell down which I also use, but I use it along with having my exhaust fan hooked up inside the tent and I run the scrubber outside as an extra precaution. I personally use a Trolmaster Hydro-X which controls EVERYTHING, but basically I keep co2 on up until the lights kick off then after 30 mins of the lights being off I kick on my exhaust fan for 5 mins and then for 3-5 mins every hour or you could even do 5 mins every other hour if you wanted. This will not only suck out the co2 and humidity once the lights kick off so it doesn't spike, but it will help you maintain your target VPD and environment since it is sucking out the stale/humid air every hour or so. This has always worked great for me, just a suggestion though. Here is a pic of my flower room, it's a 10x10 fully sealed...
Humidity is exactly the reason I'm adding exhaust back into my room. Are you in a generally dry climate? Reason I ask is my room is a similar size, but my dehumidifier is not and I'll take any opportunity I can for it to run less. What size is that dehu?
I have 2 4'x10' tables in a 10'x10' space that I sealed about 3 years ago, shortly after going LED. I have a 50ppd, and a 135ppd and they couldn't cut it. It was a struggle to get into even the high 50%'s. So I ponied up when I saw a good deal on 205, only now I'm figuring out everywhere I can save some energy and I ain't even thinking about flowering in July or August now. I'm building a chiller loop to take advantage of the cold Maine weather and not have to step up to a 3 ton AC. Saved $2k and still got the full 5 yr warranty. I guess whoever bought it first time didn't like finding a dent in a new $4k dehu, but I love it, too bad there wasn't 2 dentsView attachment 1273246View attachment 1273247I'm in Northern Cali to give you an idea of the climate and I run a 50 pint dehu in my flower tent... But like I was saying during the evening use that exhaust fan to keep everything in check, but as far as lights on all you can do is let your dehu do it's thing
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