Air Systems is a building Research in the second tier of Plumbing. Their purpose is to create or remove different gasses from the environment. Items include: Carbon Skimmer - uses Water to filter Carbon Dioxide from the air. Electrolyzer - converts Water into Oxygen and Hydrogen Gas. Retrieved from "https://oxygennotincluded.fandom.com/wiki/Air_Systems?oldid=1648" Categories: Plumbing Research Add category Cancel Save Community content is available under CC-BY-SA unless otherwise noted.