Where it fits
- A compact single-spool starting point with a 55°C ceiling. Match that limit to your exact filament.
- Current upgraded version has a circulation fan.
- 1 temperature zone; material compatibility still depends on the selected setting.
Consider this model when its documented temperature range and capacity fit the material you already use. A higher maximum setting provides headroom for some materials; it is not a reason to expose a lower-temperature filament or reel to more heat. Plan the route from the box to the printer and leave the clearance required by the operating instructions.
Tradeoffs and checks
Official store gives 85mm maximum width; SUNLU wiki gives 89mm. Confirm exact revision before promising fit above 85mm. S1 Plus is distinct from older S1 listings. Its 55°C ceiling does not meet every PETG or TPU brand's drying instruction.
Measure your actual reel rather than relying on the printed filament weight. Include protruding rims, handles, or adapters in the fit check. If a dimension above is not established, confirm it with the seller or manufacturer before ordering. Maximum individual reel dimensions may depend on the loading arrangement in a multi-spool device.
Before your first session
Read the equipment instructions and the exact material’s datasheet together. Check power compatibility, placement, airflow clearances, and reel temperature limits. Record the material brand, grade, selected setting, and duration in your spool studio. Keep the result separate from guesses about what caused a print defect.
A display reports what its sensor can observe. An air-humidity reading does not directly measure moisture deep inside wound filament. Follow a documented drying cycle and compare a repeatable print before deciding whether the intervention helped.
Research and sources
These are researched buying notes by John Morris, reviewed September 5, 2026. We have not independently measured this model’s temperature uniformity, noise, or drying performance.
