SUNLU Filament Dryer S1 Plus with Filament Holder - Reliable Filament

In this review the SUNLU Filament Dryer S1 Plus stands out as a straightforward solution for makers and small workshops that need to prevent failed prints caused by moist filament. The unit's ability to heat up to 55C and its tight-seal chamber make it particularly useful for PLA and PETG users who want cleaner extrusion and fewer clogs. The real-time 2-in LCD display and two-button controls keep operation simple, and the included filament holder helps keep spools organized while drying or in storage.

Key Features

• Drying range: Adjustable temperature from 35C to 55C allows tailored drying for PLA, PETG, ABS, Nylon and other materials.
• Tight-seal design: The secure enclosure prevents ambient moisture from rehydrating spools so prints remain consistent between sessions.
• Real-time display: The 2-in LCD shows drying time, temperature and humidity so users can monitor the process without guessing.
• Built-in fan and circulation: An internal circulation fan distributes heat evenly across the 210 x 89 mm chamber for uniform drying.
• Filament holder included: A dedicated spool holder keeps spare spools tidy and ready to feed or store after drying.
• Low-noise operation: The quieter fan makes long drying cycles less intrusive in a home or small studio environment.

Who It's For

The S1 Plus is ideal for hobbyists, educators and small business users who print regularly and need to reduce failures like clogging, stringing and poor layer adhesion. It is especially handy for those working with PLA and PETG who value a compact, easy-to-use unit that monitors temperature and humidity.

Users who require industrial-scale capacity or automated multi-spool drying will want to look elsewhere; similarly, those expecting touchscreen controls or an extremely high top temperature above 55C should consider different models. For most desktop 3D printing needs, though, this unit balances size, simplicity and control.

Pros & Cons

Pros

• Effectively reduces moisture-related print failures by heating filament up to 55C.
• Clear 2-in LCD with time, temperature and humidity readout makes monitoring simple.
• Good compatibility and chamber size for 1.75mm, 2.85mm and 3.00mm spools; includes filament holder for neat storage.
• Low-noise design suitable for long drying sessions in shared spaces.

Cons

• Temperature control is basic two-button operation and may feel limited to users wanting more advanced controls.
• The chamber fits common spool sizes but is not intended for high-volume industrial drying tasks.

Specifications

Brand	SUNLU
Model	S1 Plus
Temperature range	35C to 55C
Chamber size	210 x 89 mm (H)
Filament diameters	1.75mm, 2.85mm, 3.00mm
Display	2-in LCD with time, temperature and humidity
Included accessory	Filament holder

Our Verdict

The SUNLU S1 Plus is a practical, value-oriented filament dryer that delivers reliable moisture control for desktop 3D printing. It is best for hobbyists and small shops that want an easy-to-use drying box with clear monitoring and a compact footprint; while not a professional industrial dryer, it meaningfully reduces clogging and stringing for everyday printing needs.

Frequently Asked Questions

Can it dry different filament types?
Yes, the 35C-55C range covers common materials such as PLA, PETG, TPU, ABS and Nylon with adjustable time and temperature.

What spool sizes fit inside?
The chamber accommodates 1.75mm, 2.85mm and 3.00mm filament spools within its 210 x 89 mm interior dimensions.

Is it noisy during operation?
The dryer is designed for low-noise operation and is suitable for use during long drying cycles in home or studio spaces.