Pump That Air In
As crucial as it was to make sure there was a sump pump installed to make sure that water could be filtered through the soil, the most important addition was the air vents. You probably won’t be able to last very long underground without access to fresh air, so Wayne made sure to install two 12-inch air vents in the front and back of the bunker.
This is probably a good indicator that Wayne plans to spend a good amount of time in his bunker, but for what reason? It’s actually way more practical than you might think.