We are completing a 7x7 resin shed coop conversion and are having a debate about types of roof vents. I am leaning towards whirlybirds husband is thinking static that my plan is overkill. I have adequate venting for air intake with roof vent but not enough as a stand alone solution. I think that I need to pull air through not just let it drift out. Thoughts? I will be housing 10 girls, 8x8 attached run with Omlet auto door. We live just south of Chicago for reference. Roof is sloped front to back.