Return Air And Co2? Hvac Guys

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Canalchemist

Canalchemist

863
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I think at this point if it is a great expense maybe supplement with NG burner? I know it isn't the greatest source, but Texas kid will come up with the same if not similar calculations, math really is math no matter who is doing it.
 
Canalchemist

Canalchemist

863
143
CO2 Calculator
Result
Grow room area: 30000 cubic feet
Amount of CO2 required: 33.3 cubic feet
On time: 666 minutes
At this flow rate: 3 cuft per hour
If you are using a 20 pound CO2 bottle with a regulator, it will last 58.3 hours.
If you have a CO2 Generator a 5 gallon propane tank will last 180 hour

Random Calculator just searched and found from, https://www.hydroponics.net/learn/co2_calculator.asp
So I was off according to this calculator by about 10 hours LOL but its a rough guestimation, elevation above sea level does also affect air saturation, so if you are in the mountains you will need more versus in a valley where CO2 levels would be higher and the air would be denser by nature.
 
sixstring

sixstring

7,079
313
Yeah but that flow rate is too low for this size room.666mins is 11.5 hours so thats how long it would take to fill the room 1 time, the plants would use it faster than its filling.even a flow rate of 10 is too slow for this room imo, he should have 2 or more regulators going.plus with faster/higher flow rates you risk freeze ups on the regulator.
 
Canalchemist

Canalchemist

863
143
Ya your right, for some reason i input the run time as in lights on. Either way that's a load of co2 seems like a NG burner would be the way to go, but how does that affect the end product?
 
Slowitdown

Slowitdown

627
143
sixstring said:
Grow room area: 30000 cubic feet
Amount of CO2 required: 36 cubic feet
On time: 216 minutes

At this flow rate:10
If you are using a 20 pound CO2 bottle with a regulator, it will last 17.5 hours.
If you have a CO2 Generator a 5 gallon propane tank will last 54 hours.

that^^^^ was just done using a flow rate of 10 on the regulator,so its saying you will run out in 17.5 hours and i had it set to 1200ppm added.
heres the link to the calculator https://www.hydroponics.net/learn/co2_calculator.asp
Click to expand...

This makes SENSE! I had the flow rate at exactly 10 and it lasted saying 12-17 hours I am not sure of exact time yet. I have to run the tank and do a test to see what the ppm is at when the bottle runs out. So, I will run the tank out go back to the room the next day and do the test right away. If the tank is out the PPM in the room should be over 1000 ppm.
 
Slowitdown

Slowitdown

627
143
sixstring said:
basically i think your gunna need alot bigger bottles :) this is something i would talk to texas kid about,i seen he was using like 50# bottles all tied together.
Click to expand...

I have a 75 LB tank but it physically can not be hauled around without me breaking my back.
 
Slowitdown

Slowitdown

627
143
Canalchemist said:
I based my calculation on the fact that his 400 sqft room I am guessing is a 8 foot ceiling, guessing he setup up the CO2 the same as his other room
Click to expand...

CO2 is setup the same but the flow rate was doubled.
 
Slowitdown

Slowitdown

627
143
sixstring said:
Yeah but that flow rate is too low for this size room.666mins is 11.5 hours so thats how long it would take to fill the room 1 time, the plants would use it faster than its filling.even a flow rate of 10 is too slow for this room imo, he should have 2 or more regulators going.plus with faster/higher flow rates you risk freeze ups on the regulator.
Click to expand...

Lets say I get two 20# tanks going at a time. They both have regulators but only one has the controller. If the room reaches say its set point of 1200ppm the one with controller will turn off but the one without controller will keep going. My thing is I do not want to spend another 500 on another controller without knowing for sure whats going on.
 
sixstring

sixstring

7,079
313
You should be able to hook up both tanks to your controller as long as they both have regulators.maybe some type of splitter is required. @Texas Kid would prolly have these answers, maybe he will pop in now that I tagged him :)
 
Slowitdown

Slowitdown

627
143
sixstring said:
You should be able to hook up both tanks to your controller as long as they both have regulators.maybe some type of splitter is required. @Texas Kid would prolly have these answers, maybe he will pop in now that I tagged him :)
Click to expand...

Makes sense but I would need a splitter for sure. @Texas Kid lets get some of that expert advice sir!
 
Canalchemist

Canalchemist

863
143
I think you need this.

http://ico2.com/CARBOCOUPLER.htm

Or a tank cart for your big tank, welding gas supply should be able to set you up with a manifold system or point you in the right direction, or if you don't mind having a truck show up look into a mini bulk system, prolly be cheaper in the long run and you wouldn't have to run around all over the place.
 
fishwhistle

fishwhistle

4,686
263
I still dont think a 20lb bottle a day in a 2000 sg ft room is bad and i may be wrong on this but a 20lb bottle of co2 is like 175 cubic ft so if your burning through 33 cu ft an hour just do the math its not that many hours.Remember also when it first comes on its got to run a long time just to bring the ppms up to the set point before it starts cycling.
I dont think you can run two bottles off 1 controller because at the other side of the grow it will be totally different,how many lights are you burning in 2k sq ft?50+?and your worried about adding another $500 controller?
BTW i think most people with large rooms use 50lb tanks,their still heavy though.
 
Slowitdown

Slowitdown

627
143
Canalchemist said:
I think you need this.

http://ico2.com/CARBOCOUPLER.htm

Or a tank cart for your big tank, welding gas supply should be able to set you up with a manifold system or point you in the right direction, or if you don't mind having a truck show up look into a mini bulk system, prolly be cheaper in the long run and you wouldn't have to run around all over the place.
Click to expand...

Damn thats a bad ass connector. That might work!
 
Slowitdown

Slowitdown

627
143
fishwhistle said:
I still dont think a 20lb bottle a day in a 2000 sg ft room is bad and i may be wrong on this but a 20lb bottle of co2 is like 175 cubic ft so if your burning through 33 cu ft an hour just do the math its not that many hours.Remember also when it first comes on its got to run a long time just to bring the ppms up to the set point before it starts cycling.
I dont think you can run two bottles off 1 controller because at the other side of the grow it will be totally different,how many lights are you burning in 2k sq ft?50+?and your worried about adding another $500 controller?
BTW i think most people with large rooms use 50lb tanks,their still heavy though.
Click to expand...

That particular room has 40 lights. And I am guessing you are asking me about the $500 dollars considering the size of the room meaning I have money :)
This project was already over what our initial budget was set at but I am not going to get into $ or numbers. I do not want to spend the $500 + regulator (another $100-120) for a few reasons right now. Is this room just wasting the CO2 as stated in the beginning of the thread my initial issue was if my AC units are sucking the co2 out and dumping outside. Second, can I connect two tanks to one controller? Also, like I stated before I had a 75 pound tank but one person can not move it alone.
 
Slowitdown

Slowitdown

627
143
Canalchemist said:
I think you need this.

http://ico2.com/CARBOCOUPLER.htm

Or a tank cart for your big tank, welding gas supply should be able to set you up with a manifold system or point you in the right direction, or if you don't mind having a truck show up look into a mini bulk system, prolly be cheaper in the long run and you wouldn't have to run around all over the place.
Click to expand...

That is also a concern of mine. I do not want to keep moving, loading and unloading these tanks.
 
Texas Kid

Texas Kid

Some guy with a light
4,159
263
I run (12) 250 gallon tanks into a manifold and then a single regulator on the outbound side to feed the individual controllers in each space...on a 2 or 3 tank setup you can easily daisy chain your tanks with a pressure "T" or a 2 or 3 nib manifold. I would look in the automotive side of things for a cheap manifold with AN fitting configurations either for a fuel system regulator like used on dual carbs or NOS setups, usually real cheap and easy to find.

Earls or Aeroqip fuel distribution blocks will make it easy and you can probably daisy chain a few tanks for about $30 bucks





http://www.jegs.com/i/Magnafuel/665...kesBDh-stk7T8TYuz_E16bNmwIOkj2qKwgaAhff8P8HAQ
 
AT100171ERL
665 MP 7600 04
Slowitdown

Slowitdown

627
143
Texas Kid said:
I run (12) 250 gallon tanks into a manifold and then a single regulator on the outbound side to feed the individual controllers in each space...on a 2 or 3 tank setup you can easily daisy chain your tanks with a pressure "T" or a 2 or 3 nib manifold. I would look in the automotive side of things for a cheap manifold with AN fitting configurations either for a fuel system regulator like used on dual carbs or NOS setups, usually real cheap and easy to find.

Earls or Aeroqip fuel distribution blocks will make it easy and you can probably daisy chain a few tanks for about $30 bucks





http://www.jegs.com/i/Magnafuel/665...kesBDh-stk7T8TYuz_E16bNmwIOkj2qKwgaAhff8P8HAQ
Click to expand...

Very nice sir!
 
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