[froggy]

if i had to make a choice, i would exhale the air out of my grow room to the outside. then u dotn get the smell inside the house. i would blow it out of the top of room b/c hot air rising and i would have open holes on the bottom of it b/c cool air is down there. this also gives u a circulation effect.

and really, it doesnt matter that much if u suck or blow. personally i prefer to get blown than to suck, but that is me. but trying to force air into a place makes things harder than sucking air out. hot or not hot air, it doesnt matter cuz equilibrium will always be taking place. even tho u cannot see it, air has mass.

how much C02 in ppm is in the air we exhale?

it depends on how fat u are, and if ur a man/woman. and if ur active or a lazy potato.

the ave man @ 150lbs at resting state puts out somewhere around 12g of co2/hr. if ur in there having sex(excersise factor = 1.7)? 2ppl x ur fat girlfriend cuz u dont have a job cuz u smoke way too much weed is 3x ur weight x ur 6minute holding power = 8.16g of co2/intercourse.

now, how much time does it take for a plant to breath in ur sex gas? that is gonna be a much longer formula. but if u need me to do that, i will need to know how many plants u have and size, weight and health. so u must rip out ur plant and weigh it, roots and all. let me know if i can be anymore help...