Gas Filter
A sealed charcoal filter. Screw it into the gas mask you wear for about half an hour of foul air.
Using it
Section titled “Using it”Fitting it takes 4 s.
How to get it
Section titled “How to get it”Crafting
Section titled “Crafting”| Where | Takes | Time | Makes | Learned from |
|---|---|---|---|---|
| Chem bench | 2 ×  Charcoal, 2 ×  Cloth,  Scrap Metal |
10 s | 1 | A blueprint ( Blueprint: Filters), or 15 practice points |
Found in
Section titled “Found in”| Where | How often | How many |
|---|---|---|
| Industrial material piles | rare | 1 |
| Industrial tool racks | rare | 1–2 |
| Bunker gear lockers | rare | 1–2 |
| Intel caches | uncommon | 1 |
| Riot gear racks | common | 1–2 |
| Hospital medicine shelves | uncommon | 1 |
| Lab supply crates | common | 1–2 |
| Lab medical cabinets | uncommon | 1 |
| Lab specimen crates | common | 1–2 |
| Containment crates | uncommon | 1–3 |
| Turbine hall tool racks | uncommon | 1 |
| Turbine hall stores crates | common | 1–2 |
| Power plant medical cabinets | common | 1–3 |
| Reactor crates | common | 1–3 |
Sold by
Section titled “Sold by”Generated on 2026-11-13 from the game at commit b8361f1, rebuilt with every release (a release's name ends in its commit, e.g. build-…-b8361f1).
Every number on this wiki is read from the game's data files, and every icon is the game's own pixel art.
Credits: who made the game, and every creator whose sounds it uses.