I know that there are tons of "cold weather coop" threads on here, but a lot of the ones I see in the search go back many years and it seems that there has been a shift in ideaology regarding insulation and heating coops. I live in Alaska where we get freezing temps (day or night) for about 7-8 months of the year. I am designing a coop right now and do not plan on adding any insulation nor do I plan on having a heat lamp in there. The coop is planned to be an indoor/outdoor coop, like most are, with a fully enclosed area opening to a run. I rent my house and my landlord is only allowing 3 hens. I do plan on expanding in the future but when the time comes, I will be building a whole new coop, so room for expansion is not necessary for this coop. The thing I keep scratching my head about is the inside dimensions of the coop. Common sense tells me that a snug inside will stay warmer since the chickens will be heating it with their body heat, but at the same time, I imagine they will also not be inclined to go outside when it is -15F... so the other side of common sense tells me that more indoor space is important. So, the base of my question is, how much indoor space is required? I would like to keep the coop as small as possible knowing I will only be using it for a couple of years before I move and build a bigger coop. So, what are the indoor space requirements for an Alaskan coop with only 3 hens in it? I also plan on having Wyandottes or Orpingtons as they are very cold hardy breeds. Thanks!