SUNLU FilaDryer S4 3D Printer Filament Dryer Box


In stock



The SUNLU FilaDryer S4 is the FIRST filament dryer to fit FOUR filaments at once!


  • Holds up to 4 rolls of 1kg filament
  • Eight filament holes for multiple filament drying and concurrent printing
  • PTC heating element and 3 fans for quick heating to 70°C
  • PTC heater power: 330W, 6.9 times stronger than S2
  • Pre-configured temperature settings for PLA, ABS, PETG, TPU, PA, and PC available
  • Adjustable temperature and heating time
  • Auto humidity control function
  • Two-level temperature control safety switch
  • Soft gel layer on roller prevents issues from high temperature
  • Compatible with 1.75mm, 2.85mm, 3.0mm diameter filaments
  • Compatible with all models of 3D Printers
  • Touchscreen control


SUNLU FilaDryer S4 comes with a design size of 458mm*218mm*312mm. It contains up to 4 rolls of 1kg filament. Plus, it is equipped with eight filament holes, and PTFE tubes, which meets the users' demands for drying multiple filaments and for concurrent printing while drying with multiple printers.

SUNLU FilaDryer S4 is equipped with the PTC (Positive Temperature Coefficient) heating element and a triple-fan configuration and therefore it demonstrates enhanced heating efficiency by being able to heat up to 70°C in a shorter amount of time. The PTC heater boasts a heating power of 330W, 6.9 times more powerful than SUNLU FilaDryer S2. The 3 well-positioned fans also ensure even heating and drying.

SUNLU FilaDryer S4 comes with pre-configured temperature settings of commonly used filaments such as PLA, ABS, PETG, as well as TPU, PA and PC. These configurations are based on testing data, providing optimal drying time and temperature. By expanding options while reducing setup complexities, we aim to improve your experience.

With the auto humidity control function, when the humidity in the box reaches the set value (30%-50%) it will automatically start until the humidity drops to 25%, and then stop, to better meet the humidity needs of different types of filaments.

Integrating the PTC heating element and a two-level temperature control safety switch design provides a dual-safeguard system. Moreover, a soft gel layer is applied to the roller to prevent issues caused by prolonged high-temperature exposure, effectively offsetting the risk of minor spool deformation that could rise rotational disruptions. 

SUNLU FilaDryer S4 supports all models of 3D printers connected to use; supporting 4 printers in drying filaments during printing. Compatible with filaments of diameter 1.75mm, 2.85mm, 3.0mm.


  • Model: SUNLU FilaDryer S4
  • Heating Temperature: 70°C
  • Filament Capacity: 1KG x 4
  • Applicable Filaments Types: PLA, ABS, PETG, TPU, PA, PC etc
  • Compatible Filament Diameters: 1.75mm, 2.85mm, 3.0mm
  • Heater: PTC with 3 Fans
  • Heat Time (25°C to 50°C): 30mins
  • Heat Time (25°C to 70°C): 50mins
  • Interior Temperature Balance: ± 3°C
  • Humidity Regulation Mode: Auto-drying when humid
  • Desiccant: Yes
  • Touch Screen: Yes
  • LED Status Display: Yes
  • Filament Holes: 8 (PTFE available)
  • Power Input: AC 110V~240V 50Hz/60Hz 330W
  • Product Size: 458*218*312mm (including the height of the tripod)
  • Inner Size: 450*210*211mm
  • Net Weight: 4.8KG
  • Packaging Size: 516*278*350mm
  • Gross Weight: 5.5KG
  • QTY/BOX: 1pc
  • Colour: Black
  • Plug: SG/UK


Packing List

  • 1 x S4 drying box
  • 1 x power adapter (SG/UK Plug)
  • 1 x user manual
  • 2 x Teflon tubes (100cm)
  • 4 x Teflon tubes (8cm)


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