no exhaust grow room
- Thread starter l333t
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mr.smileyface
Well-Known Member
Mold!!!!!!!!!!! you need ventilation. If you dont your plants wont function properly. They wont transpire aswell. You dont need an intake but you really need an outtake
QuickGreen
Active Member
Prolly a dumb question, but will the outtake still function as well if it is located at the bottom of the grow area?
Hidden Agenda
Well-Known Member
They don't grow as well, but you can do small grows without much ventilation, as long as the room they are in is clean.
Vegetative growth will suffer quit a bit, and in turn so will flower growth. I just took almost two ounces (dry) off of a plant under a 150w light in a closet with no ventilation. That's not even .5g/watt, but ventilation wasn't the only factor in that, and 150w lights are difficult to get near 1g/w with.
Good luck, vent if you can. Every variable you neglect will have some sort of adverse effect.
If you have an AC plus co2, it's hard to say. The displaced air will have to go somewhere.
Vegetative growth will suffer quit a bit, and in turn so will flower growth. I just took almost two ounces (dry) off of a plant under a 150w light in a closet with no ventilation. That's not even .5g/watt, but ventilation wasn't the only factor in that, and 150w lights are difficult to get near 1g/w with.
Good luck, vent if you can. Every variable you neglect will have some sort of adverse effect.
If you have an AC plus co2, it's hard to say. The displaced air will have to go somewhere.
IAm5toned
Well-Known Member
portable a/c units vent to atmosphere anyway... theres an internal flap that diverts fresh air in/out. they have to, or else the temp differential would create an air pressure differential which would make it hard as hell to open or close the door to the room. co2 also needs mid to high 80's for optimum uptake. ive heard 86 is the perfect temp.
a few things to consider then- you will lose all your co2 using a window/portable ac unit, and the tmps wont be high enough for co2 uptake unless the air is off, which would kinda defeat the purpose, wouldnt it?
most growers that use co2 use closed loop (meaning air from outside, exhausts to outside) cooltubes to keep the temps low enough that an ac is not required... that way the co2 is not sucked out by vents and/or a/c supply returns.
a few things to consider then- you will lose all your co2 using a window/portable ac unit, and the tmps wont be high enough for co2 uptake unless the air is off, which would kinda defeat the purpose, wouldnt it?
most growers that use co2 use closed loop (meaning air from outside, exhausts to outside) cooltubes to keep the temps low enough that an ac is not required... that way the co2 is not sucked out by vents and/or a/c supply returns.
Hidden Agenda
Well-Known Member
You for sure do not want active venting of the room while co2 is being applied.
REDDFACTOR
Active Member
Yes u can do it without intake or outake ... In canada we do it ...and call it prefect room setup ... Put ac in room with co2 ... Not sure why people sayin it will have mold or wont grow ... Thats straight bullshit
indyman
Active Member
my grow room has one fan and work bitchin but the room is 10x13 and grow area of 4x4 and i run just my house ac on just the fan but my back sliding back door is 10ft away fresh air vent and just open windows in my house in in grow room and all that fresh air travels through the whole house and my ac unit pumps it in room through vent no c02 add to room and my plants thrive ,check out my flower album no prob here good luck bro!!
jeebuscheebus
Active Member
I agree 100%! Massive ingorance in this thread.
to anyone who say having exhaust is a must read this article i found http://www.cannabisculture.com/articles/3368.html
Closed Growing Environment (CGE)
Closed Growing Environment (CGE)
vertical much!
Member
closed growing enviroment or sealed room or perfect room whatever you want to call it it definately not a bad idea its about the opposite sealed rooms allow you to tinker with and perfect your plants growing environment. co2 level humidity and temp are much much easyer to correct in a sealed room. if you have no intake you have much less to worry about as far as bringing in pests or bacteria goes always a bonus.
look at evaporative coolers like swamp cooler and a seperate de humidifier, or if budget allows a nice water cooled a/c
good luck
chronictrucker
Member
Guys,
In a closed grow the room is sealed when the lights are on. A portable AC unit is used to control the temperature and a Co2 generator is used to keep the ppm at the optimal level. Plants exhale gases at night and do not require Co2 so venting the moist exhaust air is a must. I use a 4" inline fan through a Carbon filter for my exhaust so I don't have my neighbours smelling my products. Co2 can increase yeilds up to 30%.
In a closed grow the room is sealed when the lights are on. A portable AC unit is used to control the temperature and a Co2 generator is used to keep the ppm at the optimal level. Plants exhale gases at night and do not require Co2 so venting the moist exhaust air is a must. I use a 4" inline fan through a Carbon filter for my exhaust so I don't have my neighbours smelling my products. Co2 can increase yeilds up to 30%.
nathenking
Well-Known Member
Closed growing enviornments are the way to go.... with AC and Co2 you do not need to exchange any air...
Wolverine97
Well-Known Member
I can't believe how much bad advice is in this thread. A totally sealed room is the absolute best way to grow. Period. You still have to control temp, humidity, co2 etc, so it requires a bit more equipment up front, but by all means if you have the ability to do this, DO IT NOW.
Wolverine97
Well-Known Member
No, a closed grow is just that, closed at all times. You deal with humidity with AC and dehumidifiers, with drain lines routed out of the room. If you're venting at night, it's not a sealed environment. And if you're running your system as it sounds, not venting during the day but also not controlling the humidity during the day, you're asking for mold.
nathenking
Well-Known Member
Hey Wolv97, do you run a sealed room? Im in the process of designing one and could use some pointers
zelweeds
Member
There is plenty of natural Co2 in the atmosphere and to say that a closed area grow is better than an open area is an opinion not a fact. It is true however that a closed enviroment is easier to control. @ nathenking make sure you get plenty of light and plenty of ventilation, how big is you area and what kind of lights are you using?
Wolverine97
Well-Known Member
Sadly, no I don't.
zem
Well-Known Member
a sealed room maybe the best in yields, but on a scale smaller than 3kw lights, i don't think it's economical to run a 1kw A/C and expensive CO2 equipment and tanks. the cost would outweigh the extra grams, i'd rather add more light before getting CO2 if i am growing with a 600 or 1000.
