Was up in my loft today and thought, damn it's hot up here. Loft is empty right now but we'll be storing hay up there soon. Livestock live down bottom year round. It's a 30x60 pole barn with one copula and soffits. Should I put an exhaust fan up there? South or North side? Is there a way to seal it up in the winter? Although we keep the door below the area I was thinking open all winter, so I suppose it doesn't matter if it's sealed up or not.