Quote Originally Posted by MtnLionCO
bottom line is anybody can buy a co2 monitor and test it for themselves.

you could run co2 in your basement with a grow room upstairs as long as your house is closed up. doesnt have to be "sealed".

i know because i have tried many different things for myself so i know what i am talking about, that why i am making a post here in the first place. not following some manual for the first time.
Do you mean with an HVAC or air system circulating the CO2 through the house? Assuming you have an HVAC / Air system in your basement?