If the wind in winter blows primarily from the north, put any vents placed on the north side down low. Winds aren't as strong at ground level. In North America, If you could put more windows on the south side that would add ventilation and help heat the coop by passive solar radiation, if you live in the southern hemisphere you'd want windows on the north side instead.Since both eaves already have vents where else should I put vents? Will a vent on the north side behind the roosts be ok if I have a flap that closes or is that a bad idea?