Astroneer Oxygen Filter Guide: Recipe, Use, and Limits

Oxygen management is one of Astroneer's first survival lessons. The backpack has a built-in supply, but wandering too far from a base, shelter, or tether line can turn a nice resource trip into a blue-gauge panic. Oxygen Filters help cover those gaps.

What an Oxygen Filter Does

An Oxygen Filter is a consumable storage item that temporarily supplies oxygen to the Astroneer carrying it. Attach it to the backpack and it begins working immediately. While it has oxygen left, the Astroneer's normal oxygen meter will not drain.

A single Oxygen Filter can refill seven oxygen canisters worth of oxygen. When active, its blue ring lights up, making it easy to tell that the filter is currently feeding oxygen.

The filter does not keep running in every situation. It temporarily deactivates when the player connects to another oxygen source, including a Tether, Oxygenator, or Field Shelter. It also shuts off when removed from the backpack.

Oxygen Filter Crafting Recipe

The Oxygen Filter recipe is unlocked from the start of the game. Open the Backpack Printer and craft one with:

• 1x Resin

That low cost makes filters useful early on, especially before a reliable tether network is in place.

How to Use Oxygen Filters Safely

The backpack's built-in oxygen tank lasts up to 72 seconds while walking. Sprinting cuts that down to about 45 seconds. An Oxygen Filter extends that window, but because it is consumed after use, it is better treated as emergency breathing room rather than a permanent exploration system.

For routine travel, Tethers are still the cheaper option. Their recipe is also available immediately, and each bundle costs 1x Compound from the Backpack Printer. On PC, press T by default to place a tether. If another tether post or oxygen source is close enough, a line connects automatically.

If oxygen reaches zero, the Astroneer begins to suffocate, then takes damage over time. If the problem is not fixed quickly, the result is death. Space is rude like that.

One extra note: before patch 1.0.7, the in-game Astropedia listed oxygen as an atmospheric resource, which caused some confusion about how oxygen supply worked.