SUNLU Filament Dryer S2, Black, 70C Max, Large Screen Control, For TPU PLA PETG ABS Review (2026)

Core heating and drying design

The S2 heats across a range up to 70C using dual heating plates positioned above and below the filament spool along with a circulation fan, a design SUNLU describes as surrounding the roll with heat from multiple directions rather than blowing air from a single point. That kind of layout is meant to dry filament more evenly across the width of the spool than a simpler single fan design might, reducing the chance of one side of the roll staying damper than the other after a drying cycle. Drying time is adjustable across a wide range of hours, letting different filament types and starting moisture levels get an appropriately long or short cycle.

Touch screen and controls

A touch screen display several inches across shows temperature, remaining time, humidity, and the selected filament type all at once, and SUNLU includes one press recommended settings for common filament types so users do not need to look up ideal drying temperature and time for every material from scratch. The screen also lets users toggle between Celsius and Fahrenheit. This kind of at a glance display is a meaningful convenience over dryers with a small numeric readout or physical dials, since it is easy to confirm a cycle is progressing correctly without opening the lid or guessing at settings.

Single spool capacity and physical size

This model holds one spool at a time, with a stated maximum spool size the chamber can accommodate, which keeps its footprint smaller than two spool or multi roll dryers but also means it cannot dry a backup roll while another is actively printing from the same unit. For anyone who only ever runs one filament at a time, that single spool design is not a limitation in practice. For multi material or multi color printer owners juggling several rolls, a single spool dryer like this one means either drying rolls one after another or investing in a second unit or a larger multi spool dryer instead.

Filament compatibility and temperature ceiling

SUNLU lists support for PLA, PETG, ABS, and TPU among other common materials, and the dryer accepts the three standard filament diameters used across most desktop printers. Its 70C maximum temperature sits in line with what these commonly used filaments generally need for effective moisture removal. Filaments that call for notably higher and more sustained drying temperatures than 70C, which can include some nylon and polycarbonate blends, are not going to dry as thoroughly in this unit, so buyers whose primary material needs sit outside the commonly listed filaments should confirm their specific filament's recommended drying temperature against this dryer's ceiling before relying on it.

Who this dryer fits

This is a solid pick for anyone running a single filament roll at a time through PLA, PETG, ABS, or TPU, who wants clear at a glance control over temperature, time, and humidity without digging through a manual or guessing at settings. Its compact single spool footprint also suits smaller desks or print setups where a large multi roll dryer would not fit comfortably. It is a weaker match for anyone regularly juggling multiple spools who would benefit from a two roll or larger capacity dryer, or for anyone whose filament choices regularly demand drying temperatures above what this unit's 70C ceiling can deliver.

Frequently asked questions