Out in nature, wind blows the plants around pretty hard sometimes and displaces the air captured near the leaves, bringing in a new supply of oxygen and co2 gases as well as cooling the plant from the sun and helping it expire water.
     In your Klozit, YOU are Brother/Sister Nature, and have to create all the environmental elements for your cannabis to do well. Now I realize this is a huge responsibility,

  but among other things, you must supply WIND. Without it, your children will languish, and your yield will be poor. Even if you do everything else right, without wind, the plants can't thrive. An oscillating fan is the best if you have the space, but if not, (as in the case of a 3x5x8 closet) a clip-on fan will do in a pinch. Just aim it along the long wall to get the air going in a circle. Bigger fans move much more air, and, so are more efficient wind makers! As it turns out, bigger is better.

     And, sorry to make your job as brother/sister nature any more difficult, but you should provide rain daily during the Vegetative cycle. Cannabis loves it if you mist them, and it also gives you the chance to apply a VERY weak fertilizer solution as a foliar spray. (dilute the regular fertilizer solution to 1/4 strength) The rain you provide also helps to wash the dust off the plants, and will discourage bugs, especially SPIDER MITES (shudder). They REALLY HATE a regular wetting down, and will move out.
     In nature, it's normal that the rain would have subsided and it gets hotter and dryer during the flowering season, so remember to take your lead from mother nature, and diminish raining on the plants when you go to 12/12. If you do mist, do it in the earliest part of the on cycle, or you will be risking the appearance of bud molds.