c02 question

i was thinking about buying a c02 system and was wondering about this.. my growroom is in a full siez bedroom with the light and plants in the closet i have a great working ventilation system bringing in constant fresh air and fans circulating it around the entire room so the room says nice and cool i was wondering if i use c02 isnt it just going to blow around the room and vent out or is the plant going to be able to use it?? any advise would be good

Will do like you said, you need to have the fans on a timer so they turn off dering CO2 treatments. There is a thread in here called "questions about CO2" or something like that that will give you a good idea of the set up.
Adieu