co2 help with exaust fan

P

Paul Moore

Member
Hello im new to this thread and all around growing i am a medicinal patient looking for some advice, right now i have grow room that is 15*10 feet so 150sq ft im running 2 600watt HPS and 1 400watt MH with an extra 600watt HPS i can set up i have a 473cfm fan hooked up to a carbon filter which right now is running 24/7 to monitor humidity the temp is steady around 80 and humidity levels are between 40-50%, recently a bought a co2 set up with a ppm-2a controller a 20lb tank solenoid and hose to disperse i have the timer so the co2 only comes on during day light hours and im in the middle of sealing my room with silicon to make it air tight as well is a controller i can run a patch cable to shut off my fans when th co2 comes on my issues right now are how often should i be running my fans and advice for co2 and a good controller and mine is broke bought the co2 set up used and the controller wont calibrate so im looking for a new one one that i can shut off my fans auto when the co2 goes below 1200ppm and it kicks on any advice or comments would be great pics can be shown
 
J

Jonjon5555

Member
My only concern about co2 is the waiste it has if you don't have your room completely sealed off. You said you had a carbon filter running 24/7 to help with humidity where is that air pumping too cause I assume out of the room? Which is where the co2 will go too. If humidity is an issue in that case you'd need a dehumidifier. Your fans should be running constantly co2 is fine to push around the room just not pump out of the room. A lot of people will do close loop grows in this situation basically moving air from one grow room and back again intruding fresh air maybe once a day. Not a pro on co2 though don't think the benifits are worth the hair pulling and expense plus it's unatural in my opinion to intruduce massive amounts of co2 through tank. I just keep massive amounts of fresh air pumping from outdoors. And my nugs are beautiful enough for me.
 
P

Paul Moore

Member
well right now its running 24/7 because i dont have dehumidifer but i can get one if needed right now the typhoon and filter is hooked up to my stack were my wood stove use to be but again i can sell that off and just run the filter to clean the air or i have a green air controller that is suppose to shut of my fans while co2 is running or another option lol is to set my fan on a timer like every 2 hours for 30 mins or so just to move and change out the stale air and run the co2 every hour for 15 mins while the lights r on im not sure
 
J

Jonjon5555

Member
I think either way you'll need a dehumidifier down the road or you'll run into problems. As far as exhaust if your using co2 id exhaust all air out once or even twice in early morning then at night then keep co2 levels constant inbetween those times pump fresh in and run co2 again and repeat.
 
P

Paul Moore

Member
ok so what about this , IF i put my co2 on a timer during the day every hour for 10 mins, put in a dehumidifier to avoid fan use, every morning at 7am when the lights go off have a timer to run my exhaust for 3 hours leave my blower which isnt going out side and my osilating fans on 24/7 to keep air moving and the plants strong
 
J

Jonjon5555

Member
bottletoke said:
Your going to need something to keep your temps down.
Click to expand...
Well we were hoping that pumping fresh air twice a day and only running the co2 that 10 mins an hour with the fans would stabilize the temp that is if his lights are sealed and have air pumping through to a different room.
 
bottletoke

bottletoke

Well-Known Member
That's not going to work, need more then that....plus having a dehumidifier in there, its gonna be hot.

What kind of lights are in the room?
 
J

Jonjon5555

Member
bottletoke said:
That's not going to work, need more then that....plus having a dehumidifier in there, its gonna be hot.

What kind of lights are in the room?
Click to expand...
I think he said in his first post what kind of lights. I'm not the most educated on co2 but I'd assume if you used an ac there wouldn't be a point to use co2 because you would just be pumping it out of the room.
 
bottletoke

bottletoke

Well-Known Member
That's not how ac works.
Edit: just looked at the lights he's running and if he's wants co2 he needs a dehumidifier and ac.
 
J

Jonjon5555

Member
bottletoke said:
That's not how ac works.
Edit: just looked at the lights he's running and if he's wants co2 he needs a dehumidifier and ac.
Click to expand...
Depends on the ac? You can't just pump cold air into a room with no exhaust. A portable ac for example which is what I use pulls air from room blows it out cold and then pumps hot air outside through a hose. Therefore it would suck the co2 up cool the oxygen and blow it right out the exhaust. Home furnace? Blows cool air in through vent on the floor hot air back out through ceiling. There has to be exhaust for an ac. If new air is coming in there must be exhaust.
 
bottletoke

bottletoke

Well-Known Member
That's not how an ac works, it takes the ambient air from the room, blows it over the evaporator coil then goes back into the room cold. The outside air gets sucked inside trough one hose, goes through the condensor then back out. No ambient air is lost or exhausted.
Edit: sorry, just read your using a single hose. You wouldn't want a single hose for a grow.
 
bottletoke

bottletoke

Well-Known Member
Home furnace: evap coil inside the duct, condensor outside with compressor. Hooked up with a liquid suction line and and a gas line.
Compressor pushes refrigerant out which is hot and becomes a gas this point, it passes through the condensor which is outside. At this point the fans blow outside air over the coil which restores it back to liquid, that's where the heat comes from. The liquid(now cold)now goes to the evap coil inside the house where ambient air goes through it coming out cold. The refrigerant now returns to the recovery tank or back to the compressor.
 
J

Jonjon5555

Member
bottletoke said:
That's not how an ac works, it takes the ambient air from the room, blows it over the evaporator coil then goes back into the room cold. The outside air gets sucked inside trough one hose, goes through the condensor then back out. No ambient air is lost or exhausted.
Edit: sorry, just read your using a single hose. You wouldn't want a single hose for a grow.
Click to expand...
Yeah like I said depends on the air conditioner the one your speaking of recycles indoor air. Now that being said I did some further research and and came up with the solution. He's gotta have sealed hoods with air pulling coming from else where (different room, outside) and leaving through an exhaust. Cool the lights without using the air from inside the grow room. This alone with manage a lot of the temperature as far as humidity you need to stay below 60-70 when using co2 but catch this you WANT your temps above 85 but no higher then 95 so I would fire up the room for a day see where your rh and temp come out and that'll decide whether you need to use dehumidifier and ac.
 
bottletoke

bottletoke

Well-Known Member
85? ,60-70? You flower in 70rh your yield will be loaded with bud rot. Design the room so you can maintain 76 and 30%rh this way it won't struggle to cool a temp higher then 81 or lower the humidity to 40-45. I run at 77-78 sometimes higher dependant on strain but that is unusual.
 
You must log in or register to reply here.
Top