Dupes with deeper diver's lungs should be able to hold their breath twice as long.

[Ambaire]

Right now, a regular dupe and a Divers Lungs dupe will both consume breath capacity at 0.9% per second.

 

I suggest that dupes with Diver's or Deeper Diver's Lungs traits have a lowered breath capacity consumption rate. Diver's lungs, 0.675% per second, Deep Diver's Lungs, 0.45% per second. In my opinion, this is how it should have been to start with. This would let a dupe with Deep Diver's Lungs do stuff in unbreathable atmospheres for over a minute instead of the current 33 seconds.