Oxygen Not Included Vent Temperature Comparison (C)
Compare 14 Oxygen Not Included vent output temps in C, from Cool Slush minus 10 to Steam Vent 500. Klei geyser heat scale with linked converter and tables.
Visual comparison
All values
Click any row to load it as Entry A.
| Name | Value | Context | Source |
|---|---|---|---|
| Cool Steam Vent Avg 1.5 kg/s steam. Needs heat to run a turbine. | 110 degrees celsius | Marsh geyser, renewable water as steam | ONI Wiki Cool Steam Vent page: Average 1.5kg/s at 110 C; ONI-DB geyser calculator: Cool Steam Vent 110 C |
| Steam Vent Avg 0.75 kg/s steam. Second highest heat output. | 500 degrees celsius | Hot steam geyser, power taming target | ONI Wiki Geyser page: Steam Vent Steam 500 C; ONI-DB geyser calculator: Steam Vent 500 C |
| Water Geyser Avg 3 kg/s water. Ready to pipe at spawn. | 95 degrees celsius | Clean water geyser, base game staple | 5gamers ONI geyser list: Water Geyser Water average 3 kg/s at 95 C; Geyser guide PDF: Water Geyser 95 C |
| Polluted Water Vent Avg 3 kg/s. Sieve it to clean water. | 30 degrees celsius | Polluted water vent with food poisoning germs | Geyser guide PDF table: Polluted Water Vent 30 C; ONI Wiki Geyser list: Polluted Water Vent |
| Cool Slush Geyser Avg 1.5 kg/s at minus 10 C. Free cooling. | -10 degrees celsius | Freezing polluted water geyser | 5gamers ONI geyser list: Cool Slush Geyser Polluted Water average 1.5 kg/s at minus 10 C; Geyser guide PDF: minus 10 C |
| Salt Water Geyser Avg 3 kg/s. Desalinator takes the salt out. | 95 degrees celsius | Salt water geyser, needs desalinating | Geyser guide PDF table: Salt Water Geyser Salt Water 95 C |
| Natural Gas Geyser Avg 105 g/s gas. Generator fuel at spawn temp. | 150 degrees celsius | Power gas geyser for generators | ONI Wiki Guide Geyser and Vent Taming: Natural Gas comes out at 150 C; Geyser guide PDF: Natural Gas Geyser 150 C |
| Hydrogen Vent Avg 105 g/s at 500 C. Pre-cool before pumps. | 500 degrees celsius | Power gas vent, hot hydrogen fuel | ONI Wiki Hydrogen Vent page: Hydrogen Average 105 g/s at 500 C; ONI-DB geyser calculator: Hydrogen Vent 500 C |
| Hot Polluted Oxygen Vent Avg 105 g/s at 500 C. Same heat as hydrogen. | 500 degrees celsius | Hot breathable after deodorizing | ONI Wiki Geyser page: Hot Polluted Oxygen Vent Polluted Oxygen 500 C; Geyser guide PDF: 500 C |
| Infectious Polluted Oxygen Vent Avg 105 g/s at 60 C with Slimelung. | 60 degrees celsius | Germy oxygen vent, mild output | 5gamers ONI geyser list: Infectious Polluted Oxygen Vent average 105 g/s at 60 C; Geyser guide PDF: 60 C |
| Chlorine Gas Vent Avg 105 g/s at 60 C. Cool below 50 C for plants. | 60 degrees celsius | Green gas vent for salt vines | ONI Wiki Geyser page: Chlorine Gas Vent 60 C; 5gamers list: Chlorine average 105 g/s at 60 C |
| Cool Chlorine Gas Vent Avg 105 g/s at 5 C. Direct Dasha feed. | 5 degrees celsius | Cold chlorine vent, refrigeration ready | ONI Wiki Geyser page: Cool Chlorine Gas Vent Chlorine Gas 5 C; 5gamers list: 105 g/s at 5 C |
| Carbon Dioxide Vent Avg 105 g/s at 500 C. Sinks fast when cool. | 500 degrees celsius | Hot carbon dioxide vent | ONI Wiki Geyser page: Carbon Dioxide Vent 500 C; Geyser guide PDF: Carbon Dioxide Vent 500 C |
| Liquid Sulfur Geyser Avg 1.5 kg/s liquid sulfur. Solidifies when cool. | 165.2 degrees celsius | Molten sulfur geyser, hot liquid | 5gamers ONI geyser list: Liquid Sulfur Geyser Liquid Sulfur average 1.5 kg/s at 165.2 C |
About this converter
Every geyser in Oxygen Not Included erupts at a fixed output temperature, and that number sets the whole taming plan. This table ranks 14 Klei vent and geyser outputs on one scale, from Cool Slush Geyser at minus 10 C up to Steam Vent at 500 C. Cold rows: Cool Slush Geyser minus 10 C, Cool Chlorine Gas Vent 5 C, Polluted Water Vent 30 C. Mild rows: Infectious Polluted Oxygen Vent 60 C, Chlorine Gas Vent 60 C, Water Geyser 95 C, Salt Water Geyser 95 C, Cool Steam Vent 110 C. Hot rows: Natural Gas Geyser 150 C, Liquid Sulfur Geyser 165.2 C, Steam Vent 500 C, Hydrogen Vent 500 C, Hot Polluted Oxygen Vent 500 C, Carbon Dioxide Vent 500 C. Steam Turbines need steam above 125 C, so only vents at or above that line can feed one direct.
How to use it
Pick two vents and a unit in the top row, for example Steam Vent and Cool Steam Vent with degrees C. The three boxes below stay linked, so editing any number updates the other two. One box holds counts of the first vent temperature, one holds matching counts of the second, one holds the total in the chosen unit. Try 1 Steam Vent against Cool Slush Geyser to compare 500 C heat with minus 10 C cold. Click any row to load it as Entry A with amount 1.
Temperatures are eruption outputs before cooling, not pipe contents after taming. Steam at 110 C from a Cool Steam Vent must be heated past 125 C or condensed to water near 95 C, since the turbine will not start below its threshold. Metal volcanoes run far hotter, from Aluminum at 1726.85 C to Tungsten at 3726.85 C, and sit outside this vent table for a clean cold to hot read. Cool Salt Slush at minus 10 C and Carbon Dioxide Geyser liquid at minus 55.15 C are sister cold sources left out to hold the list at 14. Overpressure limits also shape use: 5 kg for gas vents, 500 kg for water geysers.
FAQ
Which vents erupt hottest here?
Steam Vent, Hydrogen Vent, Hot Polluted Oxygen Vent, and Carbon Dioxide Vent, each at 500 C.
Which vent erupts coldest here?
Cool Slush Geyser at minus 10 C, then Cool Chlorine Gas Vent at 5 C.
Can a Cool Steam Vent feed a Steam Turbine direct?
No. Turbines need steam above 125 C, so 110 C steam must gain heat first or be condensed to water instead.
Where do these numbers come from?
ONI Wiki Geyser and vent pages, ONI-DB geyser calculator and taming guides, and the 5gamers geyser output list, cross checked with the community geyser guide table.
Sources
- ONI Wiki Cool Steam Vent page: Average 1.5kg/s at 110 C
- ONI Wiki Hydrogen Vent page: Hydrogen Average 105 g/s at 500 C
- ONI Wiki Geyser page: Steam Vent 500 C, Hot Polluted Oxygen Vent 500 C, Chlorine Gas Vent 60 C, Carbon Dioxide Vent 500 C, Cool Chlorine Gas Vent 5 C
- ONI Wiki Guide Geyser and Vent Taming: Natural Gas 150 C, Copper Volcano 2226.85 C, Gold Volcano 2626.85 C
- ONI-DB geyser calculator and taming guides: per vent temperature and yield rows
- 5gamers ONI geyser list: Water 95 C, Cool Slush minus 10 C, Salt Water 95 C, Liquid Sulfur 165.2 C, Infectious 60 C
- Community geyser guide PDF table: full vent temperature column from minus 55.15 C to 500 C
- Oxygen Not Included by Klei: in game geyser output temperature readouts
Last verified: 2026-10-15 · 14 entries
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