Ceiling is not uniformity
Reaching a displayed maximum does not prove that a loaded spool is heated evenly throughout the chamber.
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Dryer capability reference
Polymaker PolyDryer
Single-spool drying and modular storage system. Polymaker reports a highest internal range of 68–73°C rather than one uniform chamber temperature.
1 spoolfeed-through documentedstorage mode
From drying to modular storage
- Dry one spool
Use the dock and the filament maker's supported cycle.
- Seal the box
Move the box into storage after drying; storage preserves dryness rather than recovering a wet spool.
- Plan the feed path
Check outlet routing, spool rotation, and the printer connection before a long job.
For the cited 60°C Polymaker PETG cycle, this model's reported temperature range clears the requirement on paper. A 70°C target falls within its 68–73°C range, so the highest measured point is not enough to establish the full cycle.
Compare dryers for the 60°C PETG reference →Temperature-ceiling screen
Family references this model can reach on paper
The spool also has a limit
Do not expose a spool to more heat than its maker permits. Respooling may be required for higher-temperature drying.
Exact product data wins
Formulation-specific instructions override this family-level screen. Confirm the exact model and current regional product specification.