My coop is 3' wide x 5.5' long x 4' tall (interior space), fully insulated, and built with standard 2x4 framing, and it's built inside the back of my garage.
With an insulated coop that small, the chickens body heat will keep things plenty warm.
No need to waste money on a fancy heating system
With an insulated coop that small, the chickens body heat will keep things plenty warm.
No need to waste money on a fancy heating system