ismokebomb
Active Member
should i still have intake and exhaust holes in my growroom if i am running co2?
intake and exhaust holes if using co2?
- Thread starter ismokebomb
- Start date
ismokebomb
Active Member
so you do not need fresh air if you are running co2?
hwy420
Well-Known Member
The air we breathe has about 600PPMs of CO2. If you are trying to retain CO2 saturation in your room, a sealed room would be more efficient, and save on your CO2 injection costs. Fresh air is not required as long as your atmosphere has the right conditions. Most plants thrive with 1500PPMs.
ismokebomb
Active Member
thank you + rep for both of you
but you need fresh air if you are not injecting co2 right? why is that?
ismokebomb
Active Member
but fresh air doesnt increase weight or make more dense buds if you inject co2?
hwy420
Well-Known Member
Nah; as long as temp, humidity and CO2 levels are adequate.
Humans & animals use Oxygen which is produced by plants, plants use CO2 to breathe . If you had a 100% sealed room & no CO2 injection, your plants would slowly deplete the CO2 levels and the oxygen level would increase; and they wouldn't be able to breathe with low CO2 & high oxygen... That's why most people bring fresh air in a sealed room if they are not CO2 injecting.
fatman7574
New Member
Close. Typical CO2 levels in a ventilated room or outside unless in an industrilal area run a level of around 340 ppm. The average level in a house during the day are about 400 ppm. Plants use CO2 as part of photosynthesis (when lights areon). The create O2 but they also respre 24 hours per day and realease CO2 when they respire. Plants if at temperatures of over 65 degrees under intense lighting require more CO2 thancan sneek in through cracks in a closed up room so need ventilation for growth related to lighting and temp. Plants in rooms with high intensity lighting at temps over about 75 degrees will need more CO2 that is supplied by mere ventilation or there growth will slow and the plants will tend to strech out. Then you throw high humidity in to the situation and it gets worse because the high humidity slows both transporation and respiration which causes even more problems.
The problem with plants and CO2 lies in the fact that they produce CO2 day and night but no O2 at night. They use more CO2 during the day than they produce, but they also produce CO2 at night especially at warm temperatures. This means in some homes with a plant filled with a well growing SOG the CO2 levels at night in the Bedroom can become quite high. This means even in the winter cracking a window is a good idea if you do not ventilate to outdoors. It is not uncommon for the CO2 level in a closed up home to e rise to over 1000 ppm at night when there is no ventilation. And that is without any plants producing CO2 that is not being vented outside. If you feel hot and sweaty at night in a room that is not hot or humid it is very likely the CO2 levels are above 1000 or maybe even 2000 ppm.
The problem with plants and CO2 lies in the fact that they produce CO2 day and night but no O2 at night. They use more CO2 during the day than they produce, but they also produce CO2 at night especially at warm temperatures. This means in some homes with a plant filled with a well growing SOG the CO2 levels at night in the Bedroom can become quite high. This means even in the winter cracking a window is a good idea if you do not ventilate to outdoors. It is not uncommon for the CO2 level in a closed up home to e rise to over 1000 ppm at night when there is no ventilation. And that is without any plants producing CO2 that is not being vented outside. If you feel hot and sweaty at night in a room that is not hot or humid it is very likely the CO2 levels are above 1000 or maybe even 2000 ppm.
ismokebomb
Active Member
answered it is!I'd consider that question answered.
+ rep for everyone who contributed advice
maps84
Well-Known Member
+Rep for the Info but I have a few questions..
if little O2 is produced given even at night the plant is exhaling Co2, why would the latter deplete in a sealed environment? Under your premise it should rise to a point where exhausting would be necessary, or I did get your point wrong?