Outside to inside hens feeder

I bought 2 hens at the beginning of summer so I had to built them a nice place to live! I started building a little henshouse that have to be isolated for winter. Cause I would like my hens to stay warm and confortable in their living place, I worried about creating big openings to be able to feed them with grains & water. So I decided to design this "outside to inside hens feeder"; an assembly of abs ducts, that will minimize temp fluctuation in the henshouse.

- 07/10/2017: As requested in comments, I add a lid to the assembly, to close the top and avoid rain going inside. (I did'nt need it on my side, cause my henshouse have a cantilever rooftop...)