How Much CO2 Does Dry Ice Produce? +Rep for Intelligent Answers!

So for the last couple days we've had a mini-heat wave. On Wed it's suppose to cool down a bit. The temp has soared to the high 80's in my grow room. I don't have the money to purchase an A/C unit right now, plus summer is nearing it's end anywho. So I've been using solid CO2 (AKA Dry Ice) to help keep temps down. It hasn't lowered the temp enough, so I am hoping the CO2 from the melted dry ice will make it okay. But honestly I have no idea how much CO2 is released from the melting of dry ice. Also I still have vent fans running, so I am sure I am nowhere near 1500 PPM but any bit of extra co2 helps I suppose. Does anyone know how much co2 is released from 1lb of dry ice? Thanks in advance for the help ladies and gents.

Exactly 1lbs of dry ice will produce approximately 1lbs of CO2 (Dry ice = CO2's solid form)

your trying to cool a grow room with 1lb of dry ice?

The density of dry ice varies, but usually ranges between about 1.4 and 1.6g/cm^3 which translates to about 87-100lbs/ft^3. Because of the inherent variance, its best to describe CO2 output via dry ice sublimation in terms of volume versus terms of weight. 1lb could have significantly more or less CO2 than another sample because of how extreme the density variance can be. If you have a good eye, you can ballpark how much you have (how many cubic feet) and figure out how many grams of CO2 you're actually getting.

i would use bowls or regular ice instead of dry ice. much cheaper. im not sure what co2 levels will be put out but dry ice is not a very efficient way for co2 supplement. the only way is the co2 generator or tanks. other ways will add co2, but not enough to really make a difference. also to help with heat make sure you have a good exhaust system.

skiweeds said:

i would use bowls or regular ice instead of dry ice. much cheaper. im not sure what co2 levels will be put out but dry ice is not a very efficient way for co2 supplement. the only way is the co2 generator or tanks. other ways will add co2, but not enough to really make a difference. also to help with heat make sure you have a good exhaust system.

Click to expand...

Regular ice is made from H2O, not CO2. So melting normal ice would do nothing for your CO2 levels. H2O ice just melts into liquid H2O. Dry ice IS CO2 in it's solid form and melts into the air as gas CO2.

Dry ice would definitely increase the CO2 in a tent as well as cool it. The question still is...how much dry ice does it take to raise the CO2 levels above atmosphere's 300ppm, closer to the optimal 1500ppm that the plants crave?

The complete sublimation of 1 pound of dry ice produces 8.8 cubic feet of carbon dioxide. That's 1,000,000 ppm.
In an 8x10 room with 8 foot ceilings:
640 cubic feet, you'd need 3 quarters of a pound every hour with no ventilation to keep levels at 1500 ppm. If you're cycling your ventilation fans every 15 minutes you'd need 3 pounds an hour.

Kevin the Great said:

The complete sublimation of 1 pound of dry ice produces 8.8 cubic feet of carbon dioxide. That's 1,000,000 ppm.
In an 8x10 room with 8 foot ceilings:
640 cubic feet, you'd need 3 quarters of a pound every hour with no ventilation to keep levels at 1500 ppm. If you're cycling your ventilation fans every 15 minutes you'd need 3 pounds an hour.

Click to expand...

So in a pinch if you just wanted to give your plants a boost after a tragedy stunts there growth, dry ice would be perfect. But as a CO2 supplement throughout veg and flower... Not very economical...

Im so glad u said that... He sounded so damn dumb bro.. Wtf do these dudes be tryna do to people on here lying PURPOSELY.. like seriously.