Fresh air / co2 requirements?

[Threepac420]

I'm using an HPS, so air conditioning isn't needed so much. From there, some air comes through and other from the cracks of my door. I have my sliding closet doors that have electrical cords in the cracks. There doesn't seem to be much freshair, but the air being pushed in and out with the oscilating fan that moves air all around inside.

I was wondering if the home co2 yeast generator, a carbon scrubber or both could be effective for recycling air or giving the plant some decent stuff?

[ISTANDALONE]

a carbon scrubber is good for ridding your closet of odor. as far as the sugar-water/yeast co2 generator, i noticed a huge difference in growth speed after making two of them. for what it costs to maintain them, def worth it. it's really not good to recycle the air in a grow room. if you have a source of fresh air, then you shouldn't need co2. if you have to recycle the air, then go for a co2 generator.

[Threepac420]

Thanks, much appreciation ! I was thinkin about throwin the CO2 Generator away...guess I'll put it back up in use