will it smell outside the room?

if i have a sealed room with window a/c do i need to worry about smell outside the room? and if i had to run a carbon filter what happens when i turn it off to inject co2? would the smell then escape?

as long as your room is sealed up tight then turning off carbon scrubber for the brief time you would need to inject the c02 the smell shouldnt escape. but if u run the carbon filter and the ac you will be pretty much wasting money since the ac will be sucked right out. try using a passive air intake system if you dont really need the ac.