In *RimWorld: Odyssey*, **coolers can function in space** and serve as the primary in-game method for managing shipboard temperatures without mods. By positioning coolers with their **hot side facing the vacuum**, players can create a functional freezer on their GravShip, bypassing complex heat-venting systems required by older mods like Save Our Ship 2.

Cooler Mechanics in Space

Coolers Work in Vacuum

Despite the lack of atmosphere, the game treats outer space tiles as valid zones for heat dissipation. This allows coolers to vent heat directly into the vacuum, chilling the internal room without requiring:

• Separate exhaust rooms
• Heat-management mods
• Temperature caps (space absorbs heat infinitely)

Placement Rules

Coolers must be installed on **outer hull walls** facing space. Interior or non-vacuum-facing placements will fail.

Building a Shipboard Freezer

Step 1: Select an Outer Wall

Identify a GravShip wall segment adjacent to space for cooler placement.

Step 2: Construct the Freezer

• Use ship-grade walls and doors for a **sealed room** (3×3 to 4×4 recommended).
• Avoid vents or gaps to maintain temperature efficiency.

Step 3: Install the Cooler

Position the cooler with the **blue side inward** (freezer) and **red side outward** (space). Proper placement triggers immediate cooling.

Step 4: Provide Power

Coolers require energy sources compatible with space environments:

• Chemfuel generators
• RTGs (Radioisotope Thermoelectric Generators)
• Other compact power systems

*Note:* Solar panels and wind turbines are ineffective in space.

Food Preservation Tips

• Set coolers to **-2°C or lower** for frozen storage.
• Use shelves to accelerate hauling and prevent spoilage.

Integrating Freezers with Kitchens

• Separate freezer and kitchen areas to preserve efficiency.
• Connect rooms with **auto-doors** to minimize cold loss.
• Store raw ingredients in the freezer; move meals to the kitchen.

FAQ

Q: Can coolers vent heat into space?

Yes, if the red side faces a vacuum tile.

Q: Are heat-dump rooms necessary?

No—space replaces the need for auxiliary heat rooms.

Q: Can I use vents in a ship freezer?

No—vents or unsealed doors compromise cooling.

Q: Valid space power sources?

Chemfuel generators or RTGs. Solar/wind won’t work.

Q: Cooler troubleshooting?

Verify exterior-facing placement, power connections, and structural integrity.