Will C02 escape through passive intakes of grow tent?

I have a grow tent set up inside of a bedroom. 2 600w lights are close circuit cooled. I have air actively coming into the bedroom when the tent is exhausted. When the tent exhausts out of the house, the air comes is sucked passively from the room into the tent through the precut vents at the bottom of the tent.

Will the passive intake flaps provide enough cover to keep the c02 in the tent long enough for the plants to utilize it ?

Thanks for the help!

type of tent
http://www.yescomusa.com/product.php?productid=851&cat=77&page=1