I am planning to place some chicken wire squares behind the three open vents for predator deterrence. What do you all think of the passive air ventilation set up so far? I am thinking this should work and keep the chickens happy?
Put in more if you can

Also hardware cloth is a much better option than the chicken wire... you can secure them in place with screws and fender washers or make a wood frame to go over it and sandwich the wire into place.