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Carbon Dioxide

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This article is considered accurate for the current version (Launch Update).

Carbon Dioxide
(CO2) Carbon Dioxide is an atomically heavy chemical compound in a Gaseous state.
It tends to sink below other gases.
Chemical Symbol
Melting point
Condensation point
-48.15 °C  → Liquid Carbon Dioxide
Freezing point
Vaporization point
0 (Very Soft)
Specific Heat Capacity
0.846 (DTU/g)/°C
Thermal Conductivity
0.015 (DTU/(m*s))/°C
Light Absorption
10 %
Gas, Unbreathable Gas
Overheat Temperature

Carbon Dioxide is a common gas resource. It is exhaled by Duplicants and occurs naturally in all Biomes. It is heavier than other known gasses and will sink to the lowest elevation if lighter gasses are present.

Usage[edit | edit source]

Carbon Dioxide clouds
  • Carbon Dioxide is considered sterile and in large concentrations will prevent food rot (completely, unlike Refrigerator). Due to ease of handling (tendency to pool in pits) and acquisition (funnel-shaped bases will have a large pool of it at the bottom), it is perfect for food storage.
  • Dusk Caps and Oxyferns require Carbon Dioxide atmosphere to grow.

Production[edit | edit source]

  • Duplicants breathe out 2 g/s of Carbon Dioxide, or 1.2 kg/cycle.
  • Polymer Presses produce Carbon Dioxide at rate of 8.33 g/s, or 5 kg/cycle.
  • Carbon-burning generators output Carbon Dioxide as a by-product:
Power / CO2 Mass
Coal Generator 20.0 12.0 30.00
Natural Gas Generator 22.5 13.5 35.56
Wood Burner 170.0 102.0 1.76
Petroleum Generator 500.0 300.0 4.00
  • There are two types of Geysers that produce Carbon Dioxide with varying rates:
    • Carbon Dioxide Vents
    • Liquid Carbon Dioxide Geysers

Tips[edit | edit source]

  • If cooled below condensation temperature, it can safely be stored away as a liquid or solid.
  • Despite creating sterile environment, Carbon Dioxide does not prevent Compost from working and is perfectly safe for plants. The tendency to pool at the bottom can help to ensure adequate air pressure.
  • In early game, to prevent CO2 buildups, many players build 'Carbon pits', where they pool carbon dioxide until they are able to get rid of it with Carbon Skimmers.