Spacebase DF-9 Wiki
Oxygen Recycler
Version Introduced Alpha 1
Required Zone Life Support
Size 1x1
Footprint 3x3
Cost 150 Matter
Demolish 112 Matter
Produces luscious breathable air and recycles stale air. Each unit allows 3 people to breathe comfortably aboard your base. - In-game description

Each Oxygen Recycler can support enough oxygen for up to three citizens.

Note: Rooms far away from an Oxygen Recycler may have low oxygen levels. To alleviate this problem in large bases, spread your Oxygen Recyclers around the base.