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co2 generator question= how do you like them?
- Thread starter rr14
- Start date
It depends on what PPM you need, how often you have to enrich the air, the size of the area, etc...
Here's the chart for Green Air Product's fuel consumption...
BTW, I've never seen a CO2 gen that costs $1700...if it truely does cost that much new, it's way overkill for someone asking questions like this. The CD36 from Green air provides enough CO2 for a 2000cu/ft grow to raise 1000ppm in 2.0 minutes and only runs about $600 new....
Here's the chart for Green Air Product's fuel consumption...
BTW, I've never seen a CO2 gen that costs $1700...if it truely does cost that much new, it's way overkill for someone asking questions like this. The CD36 from Green air provides enough CO2 for a 2000cu/ft grow to raise 1000ppm in 2.0 minutes and only runs about $600 new....
smokeyMcPOT
Member
Ya try EBAY for a Gen man. WAY CMEMORYER than 1700...lol.
A 20 lb (standard) CO2 tank will produce about 165 cubic feet of CO2.
Per the above chart, a CD-3 burner with a 5 gallon propane tank will put out 540 cubic feet of CO2.
So to answer your question: If you are using a CD-3 burner and a 5 gallon tank you will have to refill it every 4.9 weeks or 34.3 days.
Per the above chart, a CD-3 burner with a 5 gallon propane tank will put out 540 cubic feet of CO2.
So to answer your question: If you are using a CD-3 burner and a 5 gallon tank you will have to refill it every 4.9 weeks or 34.3 days.
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I
irie-i
that chart is malarky! i have a green air cd-6 my room is 1500ft3. i have a matador monitor and averaging 1300ppm i go through 30lb propane tank in 2 weeks! i did have my co2gen on a timer..theres a post from me explaining it somewhere and i seemed to use way less propane than now, but my yeild will be way higher this time.
as for co2 generators i would go with the blu-ox, it has a glow system rather than a pilot light like the greenairs. and if you get bigger than you need there will be less flame thus less heat.
as for co2 generators i would go with the blu-ox, it has a glow system rather than a pilot light like the greenairs. and if you get bigger than you need there will be less flame thus less heat.
irie-i said:
I'm pretty sure that chart presumes that the room is completely sealed. If you're venting the air then of course the consumption rates are going to go through the roof...which is why most folks either choose to keep an entirely sealed room with CO2 or a vented room without. If you're using a digital controller for the CO2 PPM's then it's going to run the burners ALOT to try to keep those ppms up at the chosen range while fighting air leaks and venting the whole time.
The ultimate issue is air quality. If you can provide enough fresh air to them then adding CO2 is not going to make a big improvement. By the same token, alot of commercial growers choose to keep a sealed environment so that they don't have to worry about exchanging massive amounts of hot air/possible odor and in that case adding CO2 is very beneficial since the plants will deplete the natural CO2 levels rather quickly.
senseless said:
The heat generated is directly correlated to the amount of propane consumed. A 5 burner will create 5/3 more heat, but it will only produce that amount of heat for 3/5 the time of a 3 burner...so there shouldn't be a difference in the total BTU output for a given ppm rise in CO2 levels.
Ideally you'll want the burner to bring the CO2 levels up fast enough to reduce the amount of time without elevated CO2 levels (5 minutes or less is considered optimal by alot of folks) but you don't want to oversize the unit too much or it will overshoot the desired ppm.
Check out http://www.genesisgarden.com/co2-generator.htm for some good info on selecting an appropriate CO2 generator.
In the long run propane is cheaper and easier to obtain since you can bet tanks swapped out at most gas stations, but the drawbacks are the heat and moisture that is produced, the space taken up by the burner and the initial setup costs. IMO, if you're running a smaller setup (1K or smaller) it's probably going to be easier to just use bottled CO2 unless you have a completely controlled environment via AC, dehumidifiers, & humidifiers.
I
irie-i
my room is sealed..well pretty sealed but certainly no exhaust. the burners are on alot which leads me to believe that i really need a bigger burner.
i would tend to disagree, ambient air is usually around 300-400ppm CO2 and marijuana thrives at 1500ppm
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G
Guest
i use a cd3 in a 16 x 16 x 8 room, no problems.
senseless
Active member
thanks Sandman thats exactly what i wanted to hear!
what do you guys think of CAP co2 generators?
http://www.discount-hydro.com/co2.asp
what do you guys think of CAP co2 generators?
http://www.discount-hydro.com/co2.asp
G
Guest
If it hasnt been said for a 10 by 10 room you'd want a CD-6 propane generator and cyclestat to control frequency and duration of burn,thats all you need.I use one in an 8 by 8 room a 20 gallon propane tank costs 15 bucks and lasts 15 days so its a buck a day.I keep my PPM around 1200 which I've found to be adequete
billbob
Member
Check out the plug'n'grow brand of generators. Very nice and no burning pilot light like the green air ones. A friend of mine has one and it seems to do what it is supposed to and is built solid. They have them at bghydro. Also, most generators come with the natural gas option. Then you just hook it to your gas line and no bottles to buy (ever!). gotta love that
Imo it also depends how bright your lights are. People using 400 watts or less arent going to notice much difference using co2 because 400w is about the limit where you can consume more co2 than you can refresh. If you are burning 1000w or more without co2 then effectively you are wasting light watts.
N
Neptune
bump
Anyone recently bought a CO2 Generator that can tell me what their room Temperature increased to?
How hot are these units? Is it like running an extra 1000w worth of light?
What was the Temperature F rise?
I'm looking at getting a Blue Ox or a Gen-1e from CAP.
What is the proper control for Generators? What device is best? I'm looking at the CAP fuzzy logic controllers.
How do I hook up natural gas to this device? I have to pipe it from someplace?? where is my NG line??
Anyone recently bought a CO2 Generator that can tell me what their room Temperature increased to?
How hot are these units? Is it like running an extra 1000w worth of light?
What was the Temperature F rise?
I'm looking at getting a Blue Ox or a Gen-1e from CAP.
What is the proper control for Generators? What device is best? I'm looking at the CAP fuzzy logic controllers.
How do I hook up natural gas to this device? I have to pipe it from someplace?? where is my NG line??
G
Guest
Man there are some severely undersized green air units on this thread.A cd-3 is made for 300 cu ft. a cd-6 for 600 cu ft cd-12 1200 cu ft etc,burn times should be between 5 and 10 minutes and shouldnt exceed 10 minutes.How you use a cd-3 in a room larger than mine and get the PPMs up in less than 10 minutes is way beyond me
