Wellllll, I don't know a darn thing about air exchangers or thermal envelopes and other such technical things, but what I can tell you is that if you don't insulate your coop, it's going to need to be small enough for 4 little chicken bodies to heat it up on their own - which is pretty small. And then, you're going to have to worry about your ventilation blowing cold air on your birds. And then you're going to have to clean it *a lot* because it's going to get stinky faster. And then, if it gets cold, or *snows* and you have to keep your chickens inside for a day or two or fourteen, then having a small space is an invitation for cabin fever and fighting.
Do you see where I'm going with this?
And don't think that running a heat lamp is going to save you money. It's not.
I just went through my first winter with my hens - and it was a long, cold, bitter winter here in MN - and I was extremely thankful for the insulation. There are many here who don't insulate, but I think those folks tend to have more than 4 birds. They do create body heat, but without the sheer numbers, it just isn't going to heat up their environment enough to guard against frostbite.
I was a disbeliever when it came to ventilation. I have fancy ridgecap/soffet vents and thought that would be enough. I didn't want to sacrifice the (hard to come by) heat for fresh, bitterly cold air. Pat was the one who convinced me - more like convinced my DH - that he was going to have to saw into his beautiful new coop for some more ventilation. We did it, grudgingly. And I'll tell you that on those bitter days when I closed up those new vents to try to keep the warm air inside, it got really stinky really fast. And it was darned cold, so you know most of that poop was FROZEN! Good ventilation is very very important, even at the loss of some of your heat. And honestly, the loss was barely noticeable when the vents were open vs. closed. But the smell inside was definitely noticeable.
Owning chickens is like owning any other kind of a pet - they cost money. If you aren't ready to spend the money/time it is going to take to provide for the animals in your care, then maybe it's best to wait. Those lucky folks in temperate climates don't have to worry much about weather and outdoor animals - but we do. Okay, I'm getting down off my soapbox now.
Do you see where I'm going with this?
And don't think that running a heat lamp is going to save you money. It's not.
I just went through my first winter with my hens - and it was a long, cold, bitter winter here in MN - and I was extremely thankful for the insulation. There are many here who don't insulate, but I think those folks tend to have more than 4 birds. They do create body heat, but without the sheer numbers, it just isn't going to heat up their environment enough to guard against frostbite.
I was a disbeliever when it came to ventilation. I have fancy ridgecap/soffet vents and thought that would be enough. I didn't want to sacrifice the (hard to come by) heat for fresh, bitterly cold air. Pat was the one who convinced me - more like convinced my DH - that he was going to have to saw into his beautiful new coop for some more ventilation. We did it, grudgingly. And I'll tell you that on those bitter days when I closed up those new vents to try to keep the warm air inside, it got really stinky really fast. And it was darned cold, so you know most of that poop was FROZEN! Good ventilation is very very important, even at the loss of some of your heat. And honestly, the loss was barely noticeable when the vents were open vs. closed. But the smell inside was definitely noticeable.
Owning chickens is like owning any other kind of a pet - they cost money. If you aren't ready to spend the money/time it is going to take to provide for the animals in your care, then maybe it's best to wait. Those lucky folks in temperate climates don't have to worry much about weather and outdoor animals - but we do. Okay, I'm getting down off my soapbox now.