Oxygen Not Included Electrolyzer Setup Guide

In the challenging survival simulation Oxygen Not Included, managing your colony's atmosphere is a constant struggle for long-term survival. The electrolyzer serves as a cornerstone machine for mid-game progression, converting water into life-sustaining oxygen and usable hydrogen gas. Mastering this machine requires a careful understanding of gas dynamics, pressure regulation, and thermal management within your asteroid base.

Understanding the Basics of Gas Separation

An electrolyzer takes clean water inputs and outputs both oxygen and hydrogen simultaneously into the surrounding environment. Because hydrogen is lighter than oxygen, it naturally rises to the top of any enclosed chamber while oxygen sinks. Capitalizing on this physical behavior allows players to design natural separation chambers without relying heavily on power-hungry gas filters.

To maximize efficiency, you should construct a sealed room housing the electrolyzer with distinct collection points at the ceiling and floor. Placing a gas pump at the very top captures the rising hydrogen, which can then be directly routed to power generators. Meanwhile, pumps placed lower in the module will efficiently draw out the breathable air to distribute throughout your colony.

Managing Extreme Heat Output

One major hurdle when running an electrolysis system is that the resulting gases are emitted at a minimum temperature of 70 degrees Celsius. If left unchecked, pumping this hot air directly into your living quarters will quickly cook your crops and stress your duplicants. Implementing a dedicated cooling loop is necessary to drop the temperatures to a safe, sustainable level.

Many advanced players utilize a cold biome or thermo regulators to chill the oxygen pipes before the air vents into the main base areas. Running radiant gas pipes through a pool of cool liquid or using insulated tiles around the generation chamber will also prevent thermal bleeding. Keeping the heat contained ensures your agricultural zones remain productive while your colony breathes comfortably.

Achieving Self-Sustaining Automation

Building a Self-Powering Oxygen Module, commonly referred to by the community as a SPOM, is the ultimate goal for resource efficiency. By routing the collected hydrogen gas into a hydrogen generator, the setup can create enough electricity to power its own pumps and electrolyzers. This layout eliminates dependencies on external coal grids or manual labor once the initial kickoff loop is completed.

Integrating automation sensors like atmospheric pressure switches prevents the pumps from running continuously and wasting precious power. Setting the hydrogen pump to activate only when gas pressure is high ensures that no oxygen accidentally enters the fuel lines. This delicate balance of sensors transforms a simple machine into an automated, highly reliable life support system for your colony.