exhaust air at night in Sealed Room?

[diseasedmind]

does a sealed room with minisplit need air exchange at night?

plants stop producing oxygen at night right?


how do you guys handle this?

 

[Snype]

My sealed rooms stay sealed. No need to exhaust.

 

[hush]

There is literally NO need to exhaust or exchange air in a properly sealed grow room. It would completely nullify the concept of sealed.

 

[moses wellfleet]

Advantages of a sealed room https://www.icmag.com/ic/showthread.php?t=260794

 

[diseasedmind]

I understand you don't want to exhaust, but how do you get around the lack of oxygen at night? do the roots still need o2 at night? Is there enough o2 left in the room from being produced during lights on? 12 hours a day seems like a long time for roots to go without o2if it is needed during that period.

there is some talk about it here, but no real right or wrong on what should be done and why.

https://www.icmag.com/ic/showthread.php?t=175521&page=2

 

[diseasedmind]

#2 Snake Plant a.k.a. Mother-In-Law’s Tongue: Of all the different oxygen producing plants, this one is unique since it converts a lot of CO2 (carbon dioxide) to O2 (oxygen) at night, making it ideal to have several in your bedroom. 6-8 waist high plants are needed per person to survive if there is no air flow (meaning you could live in a completely air sealed room if you had these plants and the Areca Palms present). The snake plant also removes formaldehyde from the air.

 

[hush]

There will never be a lack of oxygen unless you are growing in a hermetically sealed vacuum chamber. But yes, the plants produce plenty of oxygen from photosynthesis anyway, and there will always be plenty of O2 in there if your plants are healthy. If your plants' roots are suffocating from lack of oxygen it has nothing at all to do with the room not having oxygen, and indicates a problem with the media you are using (and/or overwatering).

 

[Heusinomics]

It's not a bad Q.
But you are seriously overthinking it, there is no need to worry!
There is still plenty of "oxygen" left in the rooms air for the roots.
Oxy is jst a small portion of the "air" we breath and we can get by on much less than is commonly avail... Same w plants.

 

[Snype]

I understand you don't want to exhaust, but how do you get around the lack of oxygen at night? do the roots still need o2 at night? Is there enough o2 left in the room from being produced during lights on? 12 hours a day seems like a long time for roots to go without o2if it is needed during that period.

there is some talk about it here, but no real right or wrong on what should be done and why.

https://www.icmag.com/ic/showthread.php?t=175521&page=2

Go into your bedroom and close the door and windows for a few days. Are you going to die from lack of o2?

 

[diseasedmind]

Go into your bedroom and close the door and windows for a few days. Are you going to die from lack of o2?

I would not die, but I probably wouldn't feel as good as if I had good air circulation. I just want to get as close to optimal conditions as possible.

what do people do that run hydro in a sealed room? put the air pump outside the room? what would happen if it was inside the sealed room at night?

I am just having a hard time believing that the o2 produced during the lights on hours is going to last a full 12 hours.

obviously it works if you guys are doing it that way, But is it the best way?

 

[hush]

what do people do that run hydro in a sealed room? put the air pump outside the room?

Not typically.

what would happen if it was inside the sealed room at night?

It would oxygenate your nutrient solution like it's supposed to.

I am just having a hard time believing that the o2 produced during the lights on hours is going to last a full 12 hours.

LOL, yes that seems evident.

obviously it works if you guys are doing it that way, But is it the best way?

Yes, it is. I can empathize with your overthinking ways, because I too am an overthinker... but you should know that you are overthinking this.

 

[jd4083]

So you want to...unseal your sealed room for half of the day? That's not a sealed room, friend. You might want to look into other methods if that is your plan.

 

[realistic troll]

its not like we r in a space ship ,and w'ell run out of o2 lol
but i ventilate during lites out for humity reasons
i dont have a dehue in my flower room
twice a day i do evacute as well,is it needed ?no
i just have my control set that way and dosnt cost extra, a 20 lb tank last me roughly 3 weeks ,runnin 1100 -1200 ppm

 

[realistic troll]

i can leave my door open all i want and my co2 levels stay the same ,tank goes quicker though,so if my levels dont change its still sealed corrct?

 

[BakedBandit]

Plenty of people vent at night instead of running heavy dehumidification. Depends a lot on temps etc...where you're at. Sealed during the day for c02 makes sense, but you're not losing much at night not having it sealed I you can still maintain the temp and humidity you want by venting.

 

[Snype]

I would not die, but I probably wouldn't feel as good as if I had good air circulation. I just want to get as close to optimal conditions as possible.

what do people do that run hydro in a sealed room? put the air pump outside the room? what would happen if it was inside the sealed room at night?

I am just having a hard time believing that the o2 produced during the lights on hours is going to last a full 12 hours.

obviously it works if you guys are doing it that way, But is it the best way?

You're over thinking things. I've been growing in sealed rooms for over 20 years. My pumps are in the same rooms with 1,000 PPM of CO2. Plants were being flushed in this picture. The room contains 4,000 watts of HPS light. You could also say how are your roots going to get good oxygen if we are pumping 1,000+ of CO2 in the room. The point is that plants don't require high PPM of O2 to flourish.

 

[diseasedmind]

So you want to...unseal your sealed room for half of the day? That's not a sealed room, friend. You might want to look into other methods if that is your plan.

lol, no I would prefer not to do that, but I would like to do what's best for the plants. I was basically hoping you guys would tell me exactly what you have been, There is no need to exchange air at night. This saves me time and money not having to set up fans, timers and ducting. just wanted to make sure I wasn't leaving out an important part of my sealed room

thanks for the input everyone

 

[diseasedmind]

The point is that plants don't require high PPM of O2 to flourish

they don't require it, but would they flourish more with higher levels?

like co2 they don't require high levels to flourish if you are just exchanging air, but flourish way more with elevated levels.

 

[TheArchitect]

FYI,

Fresh outside air has 200,000+ ppm of 02, and 350-450ppm co2. Adding 600-800ppm co2 is not even really making a dent in total 02.

And for every co2 molecule used in photosynthesis a molecule of o2 is produced.

If you set up your system right you can have the co2 go off a little while before the lights that way you drain down residual co2 levels before lights out.

 

[diseasedmind]

lights on plants produce O2, and use co2 so you provide Co2

lights off, they use O2 and make Co2, so you provide O2

Plants dont produce enough Co2 at night to cover daytime needs, so they probably dont produce enough O2 during the day to cover night time needs. Yes I guess thats what they believe. Me personally I have never vented at night.

found this on another site

does anyone have experience with trying both ways in a sealed room?