Oxygen Not Included Diffuser Not Working? Check Power, Algae and Pressure

Read the machine before adding another

The cited Oxygen Diffuser page lists 120 W power draw, 550 g/s Algae input and 500 g/s Oxygen output while operating. It also describes a local overpressure stop near 1.8 kg gas per tile. A diffuser labelled overpressured may be waiting because its tile is already full; building more beside it is not a solution to distant low oxygen.

Start with the building status panel and the gas overlay. The first question is whether the machine lacks an input, has intentionally stopped at pressure, or is producing gas that cannot travel where a Duplicant works.

1. Select the diffuser and read its current status. Record the exact message before changing the layout.
2. If it lacks power, trace the connected circuit back to generation and wiring. If it lacks Algae, verify stored supply and a reachable delivery errand.
3. If overpressured, inspect gas at the diffuser and the neighboring routes. Open a gas-permeable path before placing another unit.
4. If running, inspect oxygen where the Duplicants actually work and sleep; compare production, travel path and demand separately.
5. After one change, let the system run and recheck machine status plus the destination gas overlay.

References: Oxygen Not Included Wiki: Oxygen Diffuser · Oxygen Not Included Wiki: Oxygen

Separate production from distribution

The Wiki's baseline Duplicant entry lists about 100 g/s oxygen consumption. One nominal 500-g/s diffuser therefore exceeds the arithmetic demand of three ordinary Duplicants while active. This is not a guarantee that every corner is breathable: oxygen can move slowly through constricted corridors, and the diffuser can stop when its own tile reaches overpressure.

Do not infer that a low-oxygen alert in a distant room proves insufficient nominal output. Check an obstructed route, narrow passage or a sink of heavier gas before investing more Algae and power. Conversely, if the machine is continuously active and demand or losses exceed its real delivered output, another production source may eventually be justified.

References: Oxygen Not Included Wiki: Oxygen Diffuser · Oxygen Not Included Wiki: Duplicant · Oxygen Not Included Wiki: Oxygen

Worked example: an idle machine beside a breathless room

Illustrative diagnosis, not a played colony: a diffuser at the main base reports overpressure, while a remote sleeping area has low oxygen. Placing a second diffuser next to the first doubles potential input draw but may leave both locally blocked. The first useful action is to inspect the gas path between rooms and enable circulation; then observe whether the original diffuser restarts and the distant gas improves.

For a three-Duplicant baseline, the 500-versus-300 g/s comparison suggests nominal production is enough when the machine runs. It does not prove sufficient delivery, and traits such as Mouthbreather change demand. If the machine status says a different fault, resolve that actual fault first.

References: Oxygen Not Included Wiki: Oxygen Diffuser · Oxygen Not Included Wiki: Duplicant · Oxygen Not Included Wiki: Oxygen

Leave evidence for the next repair

Record the game build, diffuser status, Algae stock, power circuit, and gas overlay at both source and destination before and after one change. This tells you whether the repair addressed production, distribution or neither.

Game build / asteroid / relevant traits:
Diffuser status / powered? / Algae stock:
Gas at diffuser tile:
Gas at destination room:
One change made / result after time passes:

Before you play

• Exact diffuser status read before building another.
• Power and Algae delivery verified.
• Overpressure and gas route inspected.
• Oxygen checked where Duplicants breathe, not only at the machine.

Frequently asked questions

Sources & revision notes

Editorial revision: September 24, 2026. Source notes give the scope of each reference; the revision date is not a gameplay test date. Official documentation describes the publisher's system; community sources can contain errors. Use your installed game's own descriptions when they disagree.

1. Oxygen Not Included Wiki: Duplicant (Community)

   Community-edited baseline calorie and oxygen-use values checked September 24, 2026. Traits and game settings can change them.

2. Oxygen Not Included Wiki: Oxygen Diffuser (Community)

   Community-edited building page checked September 24, 2026 for algae, power, output and overpressure conditions; not a measured GamerWin experiment.

3. Oxygen Not Included Wiki: Oxygen (Community)

   Community-edited reference checked September 24, 2026 for baseline oxygen consumption and the distinction between production and breathability at the destination.