Unlocking the Cold Room introduces a strict environmental hazard modifier: the Cold Constraint. Leaving temperature-sensitive parcels in standard mailroom zones or out on the sunny boat dock during the day phase will cause ambient heat damage, resulting in severe score deductions on your shift summary sheet.
The Cold Room Protocol: Daily Operational Steps
To completely eliminate temperature-related damage penalties, follow this exact sequence at the start of every shift:
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Purge the Cold Debris Pile: Immediately interact with the frozen junk pile inside the Cold Room to clear space.
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Scan for Hidden Cold Constraints: Run all extracted junk boxes through the conveyor scanner. Parcels pulled from the backroom are not guaranteed to be standard stock; many spawn with the Cold Constraint active.
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Inspect Visual Texture Overlays: Check the surface mesh of your parcels. Cold-sensitive boxes often display subtle frost or ice particle effects on their cardboard faces.
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Isolate Instantly: Move any parcel flagged with the Cold icon directly into the Cold Room.
Stacking Rules for Multi-Trait Hazards
Parcels can stack multiple hazardous traits at once (e.g., Cold + Heavy or Cold + Fragile). Use the table below to determine the exact structural placement inside the Cold Room:
| Parcel Blueprint Type | Threat Combination | Required Storage Strategy | Risk of Violation |
| Raw Fish Delivery (e.g., Aerys E.) | Cold + High Spoilage | Place inside the Cold Room immediately. Do not mix with regular shelf stock. | Immediate total package ruin and zero payout. |
| Heavy Frozen Box (e.g., Caesar L.) | Cold + Heavy Modifier | Must touch the Cold Room floor grid or the absolute bottom layer of a cold shelf. | Crushes any lower parcels overnight, causing hidden structural damage. |
| Fragile Chilled Box | Cold + Fragile Modifier | Must occupy the absolute highest layer of a cold shelf with completely open vertical air space above it. | Any item placed on top will instantly trigger a crushed mesh penalty. |
| Standard Cold Box | Cold Constraint Only | Can be stacked safely on mid-level cold shelves. Can also act as a base for lightweight items. | Ambient heat damage if left outside for more than a few minutes. |
The Sunset Loading Trick: Managing Boat Deliveries
A major point of failure for postmasters is loading cold parcels onto the Captain’s boat too early. Because the outside dock is an uncooled zone, cold parcels will expire under the sun if they sit on the boat deck during the daytime phase.
Follow this strict timeline to deliver cold shipments safely:
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Step 1 (Day Phase): Process all incoming counter queues. If a customer hands you an outgoing cold package (such as a blue Port Wendy or green Sunny Shores cold parcel), apply the stamps and store it inside the Cold Room immediately. Do not place it on the dock.
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Step 2 (Dusk Phase): Wait until the Captain physically arrives at the dock and you have served the final walk-in customer of the day.
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Step 3 (The Interception): Before touching the departure bell or completing the final shift interaction, run into the Cold Room and collect all outgoing cold parcels.
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Step 4 (Final Packing): Rapidly transfer the cold boxes directly from the Cold Room to the boat deck grid, adhering to the heavy/fragile stacking rules.
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Step 5 (Instant Departure): Ring the departure bell immediately. This minimizes the parcel’s exposure to warm outside air and guarantees a flawless transit score.
Troubleshooting FAQ
Q: Can I store standard, non-cold parcels inside the Cold Room to save space?
A: Yes. The Cold Room functions as a safe universal storage zone. Standard parcels destined for Port Wendy or Sunny Shores will not sustain any damage or score penalties from being stored in the freezing temperature overnight. Only the reverse scenario (leaving Cold parcels in the warm room) triggers a penalty.
Q: Why was my cold parcel marked as “Chilled/Damaged” even though I kept it in the freezer all day?
A: This happens if you accidentally closed your daily shift while holding the parcel in your hands, or if you left it sitting on the counter table while sorting other items at the very end of the day. Always return cold items to the physical freezer mesh before ending the shift.
More Guides:
- Cat Mail Co.: Multi-Route Boat Stacking and Physics Controls
- Cat Mail Co.: Advanced Resident Clues Guide
- Cat Mail Co.: Begginers’ Guide (New Postmaster Foundation)
