Air Vent Regulator

I searched for a Air Vent Regulator for my shed, to regulate the air manually. Instead of doing something complicated, i saw this blastgate and remixed it. The result is a manual Air Vent Regulator :) I printed it in PLA, and it works like a charm. My vent holes didn't fit the Air Vent Regulator (i call it a Air Vent Regulator, but i do not know if that's correct). I placed a piece of plywood in between.