Auto Coop Door Heater

[PuffinStuff]

This is a simple design auto coop door and heater I see many people are using so I built one for myself and love it.

 

[FarmPrincess]

Oh this is a great idea.... I've been trying to come up with an economical plan. Is there anyway you would give me more info on how you built/rigged it? It looks pretty simple, but just in case. Did you have any kinks you had to work out etc?