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
SUNLU FilaDryer S4
Four-spool, multi-printer chamber with eight feed holes, automatic humidity control, and a documented 70°C maximum.
4 spoolsfeed-through documented
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. Capability data was checked 24 July 2026.