Flowmos

Did you know that, since scrubbers only remove gasses that are not O₂/N₂ from the air and since you technically use up the O₂, eventually organic mobs will use up all of the oxygen in smaller rooms? It's true!

Enter Flowmos.

Flow-based atmospherics is simple: instead of doing the filtering within the scrubbers, all scrubbing takes place in atmos itself. While the latter may be familiar, the former requires two new atmos components: air inlets and air outlets. Air inlets release gas from distro into the room at standard pressure +5kPa, and air outlets take gas from the room at -5kPa. This leads to a constant flow of atmos from the inlet to the outlet throughout the room. There are a few side effects of this:

• Clearing a room of trace gasses is slower; use portable scrubbers if needed
• Panicking an air alarm through a scrubber is not possible; you'll have to pry/RCD plating to vent the room
• Placement is important, particularly in hallways, so as to create flow over distance; don't place inlets right next to outlets, but alternate every ten tiles or so

The plus side, however, is perpetual rounds without characters dying in small rooms after they breathe all the O₂. Also, your engis have more to do~