how often to vent seald room?

[black_thumb]

i dont have any co2 so how often should i vent the room? the room is 10 x 10 x 8 feet.

outside temps get over 100 F in summer so i have to cool with A/C.

 

[odium33]

you shouldnt have a sealed room if you dont have co2.... so as often as possible, they need co2 from outside. sealed room, you provide the co2 via bottle or generator, then you dont need to vent at all...

 

[lokes]

Yah, if you sealed it to prevent smell, then you need the co2 like odium said. I would be interested to hear from the community on one thing though.

I read and interesting post on venting that stated they believe venting the room in under 3min may cause stress on plants. I believe they were speaking about negative pressure.

Can anyone pipe in on this?

 

[black_thumb]

how much co2 would i need?

 

[lokes]

Uh, that's a pretty vague statement. Do a search, there's tons of useful information on here regarding CO2 and PPM's.

 

[johnipedestran]

negative pressure is a fine thing. it is what my room has all the time. meaning air is constantly being sucked out of my room. through a carbon filter and out into the rest of my space. no smell, ever


peace
jip

 

[black_thumb]

100 F with 80-90% humidty it bud rot and have to toss them out.

 

[Japanfreakier]

how much co2 would i need?

nothing vague about this question at all. Most growers seem to keep is around 1200~1500 ppm, but I in some grow books it claims over 1400 doesn't really matter.

 

[The Phoenix]

Here are some CO2 levels and how they affect plant growth.
Below 200 ppm (Plant Growth Slows)
350-430 ppm (Outdoor Air)
600-1500 ppm (Optimal For Marijuana)
Above 2000 ppm (Toxic For Marijuana)

Carbon Dioxide (CO2): Marijuana plants consume carbon dioxide (and expel oxygen) in the daytime hours. During the dark period at night they consume oxygen (and expel carbon dioxide).
When the light is on in a grow room, plants will consume CO2. In a room with little or no replacement carbon dioxide, plants can consume all the available carbon dioxide in an hour or less.
When CO2 levels fall, plant growth slows. Letting in air through a window, door, or other means (and keeping it circulating around the leaves with a fan) will be necessary.