I'm in the beginning stages of planning a coop for 4 hens and maybe a bantam. I plan on making the coop 6x7 ft. Giving each bird 8.2sqft. The climate where I live in cold with 120" of snow per year. My previous hens were raised in Oregon so I'm used to building hen houses for very mild climates. I've been reading the stories guide and they talk about making the chicken house pretty small to conserve heat and making the roof 2' over the perch. My question is, if the perch is 2ft off the ground and the roof is 2ft over the perch, how can I achieve proper ventilation without having a draft blowing around the chickens head? Also if you live in a climate similar to mine and wouldn't mind posting pics of your coops that would be great. I've attached the temps for my town so you guys can see how cold I need to build for.