One last touch for the little chicken's coop was a small fan for ventilation. It's in a mostly shaded spot, except for a little sun in the morning. But Dan was concerned about helping keep the air fresh in the coop, so he added a ventilation fan.
The fan he used came from an old 12-volt travel cooler. He used these coolers when he was on over-the-road truck driver. While they aren't true refrigerators, they keep the cooler contents cool by forcing air over a small fan with aluminum fins. It won't actually cool the coop, but it will help keep a modest air flow going and that's the point. He just used what we had!