Oxygen Not Included Wiki

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Oxygen Not Included Wiki
This article has not been revised for the current version (U39-490405). It was last updated for LU-356355. It may contain inaccuracies.
This article has not been revised for the current version (U39-490405). It was last updated for LU-356355. It may contain inaccuracies.

Oxygen Diffuser is the first structure available for Oxygen production, it consumes Algae.


Oxygen Diffuser is mainly used to supply Oxygen to large rooms. It has a fast output, making it able to fill an entire room with Oxygen, allowing duplicants to breathe. Because of its fast output, it is also great for keeping off unwanted gasses where they are, or redirecting their flow by using the oxygen to push them.

Because oxygen flows slowly in tight corridors, the Oxygen Diffuser should not be used to supply many other rooms with oxygen other than the room it is in. By using multiple gas permeable tiles or an air ducting system, one can move oxygen to adjacent rooms more easily.

Oxygen Diffuser has a poor algae to Oxygen conversion ratio, and will quickly burn through your stock. When you are low on algae, it is a good idea to turn the Oxygen Diffuser off in order to let a more Algae-efficient method to take over oxygen production.


Oxygen Diffuser uses 550 g/s of Algae, it can hold up to 330 kg. When contents of a Oxygen Diffuser is lower than 132kg Algae, It generates Life Support Supply Errand to supply the difference between 330kg and current contents. Therefore It won't let duplicant supply over 200kg to Oxygen Diffuser.

Since It doesn't make same errand, It can make double errands by supplying insufficient amount and wait until sum of supplying amount and content is less then 132 kg.

Oxygen Diffuser stops functioning when the tiles it is on contain more than 1800 g of gas (this is Overpressure). This means that if the gas it is on is not Oxygen, it will not be able to pump out oxygen in order to push the gas away.

Germs on Algae are not destroyed by deoxidation. Algae taken from spots surrounded by Slime will likely be infected with Slimelung. The germs will not survive for long in pure oxygen.

Created oxygen has a temperature of 30 °C (or higher if the inputs are hotter). The THC difference in materials make it inherently heat multiplying, this effect will increases the farther the inputs temperature is from 30 °C.