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Oxygen Filters are a replaceable component of every oxygen generator and play a crucial role in the game. Restoring atmosphere to an area will both decrease the Infection Rate and allow West to traverse the area without the need for oxygen canisters.

To craft a new Oxygen Filter, Albert West must first perform research on a Broken Oxygen Filter or level 1 oxygen filter using the Bio Research System. This will make the blueprint for an intact filter available for production at the Bio Combine System. Broken filters can sometimes be found in crates near Oxygen Generators, and are always found installed inside the Mars station's many non-functioning Oxygen Generators.

Once installed, a manufactured Oxygen Filter will never break, but further research will lead to the production of improved versions that inhibit the infection's spread.

List of Oxygen FiltersEdit

Picture Name Weight Effects Research Chip Level Needed to make
Oxygen filter trans
Oxygen Filter 1.00 Kg None 1
Oxygen filter MK II trans
Oxygen Filter MK II 1.00 Kg Infection Suppression 1
Oxygen filter MK III trans
Oxygen Filter MK III 1.00 Kg Infection Suppression + 2
Purification Filter 1.00 Kg Purification 3

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