How We Heat Our Small Coop WITHOUT Electricity [CC]

We searched high and low for a heat source for our small coop during the winter that didn't use electricity or any burning medium, and we came up with a brilliant idea this past week that works!! Watch this video to find out how we did it.

NOTE: We live in Zone 6b and don't have extremely cold sub-zero (Fahrenheit) winters, but it does get down into the teens and low 20ºs (F) most winter nights.