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🔥 Keep your filament fresh, your prints flawless, and your 3D game ahead of the curve! 🎯
The SUNLU Official Filament Dryer S4 is a cutting-edge 3D printer filament dry box designed to handle 4 spools simultaneously. Featuring a powerful 350W PTC heater, it heats up 50% faster than typical dryers, while triple fans ensure uniform drying with precise temperature control within ±3℃. Its smart auto humidity system maintains optimal filament moisture levels, preventing print failures. Enhanced with triple safety protections, this sleek white storage box guarantees worry-free, professional-grade filament conditioning for millennial makers and managers who demand efficiency and reliability.








| Brand | SUNLU |
| Colour | White S4 |
| Compatible devices | Laptop, Desktop |
| Item weight | 4 Kilograms |
| Material | Plastic Filament |
| Product dimensions | 21.1D x 21W x 21.1H centimetres |
B**D
Good Dryer
I've had this for about 6 months. It drys filament very well and is very cheap on electricity (maybe 1p-2p and hour GBP). It take four reals and has ports where the filament can remain in the device, but can fees into my 3D printer.
K**N
The Sunlu S4 dryer is an impressive and budget-friendly option
The Sunlu S4 dryer is an impressive and budget-friendly option for both beginners and seasoned hobbyists. It offers a solid build quality, and a user-friendly interface. The setup is straightforward, and the quality is decent for the price, it provides excellent value for money, especially for those just starting with 3D printing or those looking for a reliable dryer holds 4 rolls
R**S
Works exactly as it should
Very pleased I bought this, had a few problems with damp filament, but this sorted it out. Easy to use, great price and you can dry 4 kg at the same time (4x 1kg reels)
D**H
Great with Bambu AMS
This has been really useful in conjunction with my Bambulabs A1. Its been simple enough to connect into the AMS, and you can print adaptors to mount the feeders on top of your machine. There is now a version which includes the feeders and spools in one bundle. This would be great if you use spools withe the Bambu rfid tags. If you don't use the rfid enabled spools then this is functionally similar so check which is cheaper.
D**D
Love it
To be honest it does the job and does it well and currently there’s nothing similar on the market really happy with my purchase
J**S
Does a great job
Overall, I have found this to be really good at drying filament that has been stored badly. Only using it as a stand alone dryer - not for feeding from. Very happy.
S**4
Not bad but the doors have gaps…
The over impression is positive however I underwood the unit is a sealed which it certainly is not. Most disappointing that the doors have 1-2mm gap. Why should you not seal the unit to reduce filament moisture contamination for as long as possible?
D**D
Muy buen producto cumple con creces
Gran producto estos Sunlu saben hacer productos buenos y económicos para lo que cuestan, la única pega es que si alimentas por la parte superior, no puedes acceder bien a las bobinas si no quieres estirar del filamento, por lo demás muy contento
M**N
Tolles Gerät, das mir das Drucken viel leichter macht
Ich benutze die SUNLU Filament Trockner Box S4 jetzt einige Zeit und bin richtig begeistert. Besonders praktisch finde ich, dass ich gleich bis zu vier Spulen gleichzeitig trocknen oder lagern kann – das spart mir viel Zeit und Stress. Das Gerät heizt super schnell auf und hält die Temperatur konstant, sodass mein Filament immer perfekt trocken bleibt. Die Feuchtigkeitskontrolle im Display gibt mir zudem viel Sicherheit, dass nichts schimmelt oder verdirbt. Klar, die Lüfter sind hörbar, aber für mich kein großes Problem. Wer viel 3D druckt, sollte sich diese Box definitiv anschauen – sie hat mir meine Druckqualität deutlich verbessert!
C**O
must have
ottimo prodotto, funzionale e ben costruito. Comodissimo e must have per chi stampa!
M**E
Très efficace
très efficace, je suis descendu au maximum d'humidité de 20%. De la place pour 4 bobines, pas contre, il n'est pas indiqué comment monter les axes rotatifs porte bobines, mais on trouve facilement. A voir dans la durée.
J**E
parfait
article acheté en seconde chance mais en parfait état et comme d'ecrit dans la description, fonctionne super bien et assez compact
Trustpilot
4 days ago
3 weeks ago