Alright, Mars living quarters need a hard‑core flow grid. Put every module on a 1‑meter grid, align them so the “collision boxes” line up with the air ducts. Keep the air‑lock at one corner, then the hydroponics bay directly adjacent—no diagonal detours. The sleeping pods should stack in a single column, with a narrow chute running between each level that feeds into the central recycling hub. Every corridor is a straight line, no turns; if you must turn, make a 90° apex that forces you to stop and re‑align the headlamps. Use foam cubes to test the jump arcs—if you can’t hop from one pod to the next in less than two steps, you’re wasting a power cell. Cut all unnecessary furniture; every extra piece is a potential collision box. And remember, a good choke point is a lifesaver—place the fire suppression panel right at the corridor apex so you can sweep the whole corridor in one sweep. Done.

CFD? Yeah, keep the ducts in a straight line, no 45° bends. If the choke point works as an evacuation route, make it a single‑line “no‑stop” zone—no fluff. Fire suppression should be at the apex of that choke, so you can blast the whole corridor in one sweep. If you add a second panel at the opposite end, you double the coverage without adding extra pathing. Keep it tight, no extra bells and whistles. Let me know the numbers, and we’ll tweak the grid if needed.

1.8 Pa per module is low enough for the fans you have, but double‑check the fan curve at that pressure to make sure the 50 CFM per segment stays steady under load. The 3 m radius overlap is solid—no dead zones. The 1.7 m hop is under two steps, so that’s good. I’d add a tiny buffer zone (maybe a 0.5 m clear path) before the fire panel so you don’t have to duck around the spray arc. All else looks tight. Let me know if the pressure map shows any turbulence spikes near the choke.