Bert’s coop works so well. It’s –20F outside tonight with a wind chill of –40F but...

Bert’s coop works so well. It’s –20F outside tonight with a wind chill of –40F but the coop is 35F and the nests are 45F, with NO external heat supply. Just heat from the Chickens. with a tiny exhaust fan to keep the humidity down to 50%. By morning it would be a bit colder so just for overnight Ace put in a 80watt hair curler to supplement heat just for tonight. Today it was –5F, but the solar powered aviary was 65F and 100+ in the sun, which warms up the coop too... All for free. In Summer the coop stays 4 degrees cooler than the outside temp. These are some lucky Chickens.