It doesn't deplete it, it displaces it and yes, CO2 is heavier that oxygen so it sinks.

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Good health is merely the slowest possible rate at which one can die.

thanks for catching this

yeah, technically speaking, CO2 displaces oxygen first then depletes remaining oxygen through dilution

when i was a fireman we were not allowed to enter a room where the CO2 system had gone off, we had to first ventilate it well and have our breathers on prior to entering the room

that is actually some good solid info to know... non toxic way to get rid of mites.... veddy veddy intalestink

You are confusing Carbon Monoxide (CO) with Carbon Dioxide (CO2). I am a retired firefighter and CO2 is not poisonous. It does displace Oxygen which can kill you. Carbon Monoxide is poisonous and will kill you quickly. You are thinking of CO monitors. CO is a product of combustion and can cause harm to humans with concentrations as little as 15 ppm. Carbon dioxide is a product of combustion as well but is also a waste byproduct of respiration of animals.

i never said carbon monoxide nor am i confusing it with CO2 and i never said CO2 is poisonous.

what i said was, "CO2 depletes oxygen. depending on the amount, it might not b a good idea to use CO2 or store CO2 in a living space, especially where u sleep or in a basement. if i'm not mistaken CO2 also sinks.

again, depending on the amount, hoping the plants will use up the available CO2 would also not b a good idea

it's not uncommon in a CO2 environment to cause death -- i do not know the amount to make it lethal"

i would suggest to error on the side of caution because some growers use CO2 with their grows .

peace,

see the reference below --

"The health effects associated with exposure to carbon dioxide are paradoxical. At the minimum design concentration (34 percent) for its use as a total flooding fire suppressant, carbon dioxide is lethal."
reference: http://www.epa.gov/Ozone/snap/fire/co2/co2report.html

"At concentrations greater than 17 percent, such as those encountered during carbon dioxide fire suppressant use, loss of controlled and purposeful activity, unconsciousness, convulsions, coma, and death occur within 1 minute of initial inhalation of carbon dioxide (OSHA 1989, CCOHS 1990, Dalgaard et al. 1972, CATAMA 1953, Lambertsen 1971)."

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journal organic grow
http://www.rollitup.org/grow-journal...or-lights.html

I read about a guy who died in a dry ice freezer over night from carbon monoxide poisoning

Again, dry ice is Carbon dioxide not Carbon Monoxide. Carbon Dioxide causes death by displacing oxygen. CO2 is not poisonous but that doesn't mean it's not dangerous. You can't die from Carbon Monoxide poison in a dry ice freezer because Carbon Monoxide isn't present in concentrations high enough to kill you. What happened was the guy suphocated because the Oxygen in the air was displaced by the Carbon dioxide.

Sorry. I thought you were talking about CO monitors not CO2 suppression systems. We weren't allowed to overhaul without SCBA until CO concentrations had fallen below 15 ppm. That's what I thought you were talking about. My bad.

Here is a little info on CO2 and CO.

http://www.ilpi.com/msds/ref/carbondioxide.html

no biggie, doc

sometimes the growers in here concern me when they use CO2 tanks or have wires going all over the place or do things haphazardly etc, don't want anyone getting hurt

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journal organic grow
http://www.rollitup.org/grow-journal...or-lights.html