Oxygen is a key element on most ships. All crew members require oxygen to prevent suffocation, except crew and boarding drones and Lanius.
Overview[]
- Functioning Oxygen system replenishes the ship's oxygen (O2) supply.
- The color of the room indicates the current O2 level: white - maximum, pink/red - lower, red lines across the room - 5% or less O2.
- The "O2 LOW!" warning appears when the total O2 percentage on the ship drops below 25%.
- A room's O2 level decreases when: the room has fires (0.96% O2 every second per fire in the room); there is a breach or a Lanius in the room (both have the same O2 draining rate); a door to another room with lower O2 level is open; the Oxygen system is unpowered or hacked; there is an open airlock in a connected room with opened door (an airlock instantly drains the O2 in the room it is opened in, and quickly drains the O2 from the connected rooms with opened doors; more airlocks drain the O2 from farther rooms quicker; the drain speed surpasses that of several Lanius and breaches); the Oxygen system is unpowered.
- If the Oxygen system is unpowered, the ship's O2 level drops by 1.2% every second in every room.
- A functioning level 1 Oxygen system replenishes the O2 at 1.2% rate every second in every room.
- Crew suffocation occurs at 5% or less O2 in the room. Suffocating crewmembers take 6.4 HP damage per second.
- A functioning level 1 Medbay negates the suffocation damage in an airless Medbay. Level 2 Medbay will slowly heal the crew.
- Boarders and your mind-controlled crew will attempt to move out of O2-deprived rooms to reach rooms with 10% or more O2.
- Emergency Respirators (Advanced Edition content) augmentation halves the suffocation damage of your crew; also works when boarding the enemy ships.
- The Crystal race takes half of the suffocation damage. With Emergency Respirators they take only 25% of the suffocation damage.
- The Lanius race doesn't need O2, nor suffers from suffocation - they drain the O2 instead (at the rate of a breach).
- Fires begin to die out when a room has less than 10% O2. (see details)
- If a room is totally vented, opening a nearby room with some oxygen will speed up the O2 recovery; more opened rooms with higher O2 levels connected to the vented room will speed up the O2 recovery even more; a long pathway of rooms with O2 connected to the vented room has the biggest impact on the O2 recovery (the longer the pathway of consecutively connected opened-doors rooms with O2, the bigger the impact).
- When a room has a breach (or a Lanius), the O2 level drop in the room can be slowed down by opening doors of adjacent rooms with O2. Opening multiple rooms with O2 slows down the O2 level drop in the breached room more, at the expense of lowering their O2 levels. A long pathway of consecutively connected opened-doors rooms with O2 slows down the O2 level drop in the breached room the most (the longer, the better).
- During an FTL Jump:
- The oxygen level is not affected by the Oxygen system status (i.e. whether it is on or off) and the O2 level is not equalized between the rooms (in terms of refilling).
- Opened airlocks, breaches, Lanius, and fires drain O2 during an FTL Jump. The ship O2 level, if affected by any of these factors, will be updated upon un-pausing the game after the Jump.
- Fires can die out due to low O2 level in a room (and can also spread naturally).
- Upgrading the system increases the O2 refill rate.
- The refill multipliers for level-2 and level-3 Oxygen system in the ship upgrade menu are incorrect: Oxygen-2 refills O2 4x faster than Oxygen-1, and Oxygen-3 refills 7x faster.
- Oxygen-2 can counter the O2 loss due to a breach (or one Lanius) if enough adjacent rooms with O2 are opened or if there is a long enough pathway of consecutively connected opened-doors rooms with O2.
- Oxygen-2 refills the O2 level fast enough to counter the O2 drain even from Hacking-3 disruption pulse.
- Oxygen-2 prevents fires from dying out. (the O2 refill rate surpasses the O2 loss caused even by 4 fires)
- Oxygen-3 refill rate exceeds the O2 loss from a breach (or one Lanius) without requiring the room's doors being opened (although it might take a while to refill a fully-vented room).
- Upgraded Oxygen system can be used as a blue option in some events.
- Can be upgraded in Federation terraforming team C12 and Specialty work on your ship events.