Is that the only exhaust you are using? Do you have a fresh air inlet? cO2 gives off heat.They temps will increase as you administer cO2.You don't want to exhaust the cO2 just stablize the room temps to adjust. That's why I would agree with haze.When a plant flowers,it's roots stop growing.So not so sure about rootbound,unless they were rootbound before you flowered.I hope this rant was of some benefit to ya!

Ga Grown!