Exhaust fan or handful of vent covers??

[K0k0shka]

Correction. It’s actually 4x8 and they have 16feet of roost space. They have plenty. I forgot I put 8 foot 2X4 roosts in there.

So 7 birds in a coop for 8, that's better but they still need plentiful ventilation (more than a few holes). Roost space is irrelevant here.

 

[Baker1181]

So 7 birds in a coop for 8, that's better but they still need plentiful ventilation (more than a few holes). Roost space is irrelevant here.

There is plenty. The point of this thread is was to decide with my redesigning if I wanted a fan and get recommendations on brands like the person above gave. I utimately chose passive ventilation and put the correct amount needed. I appreciate your input.