Chinese 3D printer manufacturer Creality has expanded its ecosystem of 3D printing accessories with the launch of the SpacePi X4 Filament Dry Box, a high-capacity dryer designed to meet the needs of professional and engineering-grade users.
Featuring dual independent drying chambers capable of holding up to four spools and reaching temperatures of up to 85°C, the SpacePi X4 targets multi-material workflows and high-performance filaments such as PAHT, PC, and carbon-fiber-reinforced nylons. In this review, we explore the key features of the SpacePi X4, assess its usability, and share the results of our filament drying tests across several moisture-sensitive materials.
While the SpacePi X4 offers a high degree of control for experienced users, its preset-driven workflow and clear interface make it accessible to beginners. This balance of automation and flexibility positions it as a versatile tool for both casual makers and professional print farms.
Available directly from Creality’s official store, the SpacePi X4 Filament Dry Box is priced at $199.
Why filament drying matters
Many 3D printing filaments are hygroscopic, meaning they absorb moisture from the air over time. This is particularly true for engineering-grade materials such as nylon, polycarbonate, and PETG, which can take on enough water in just hours to compromise print quality.
Moisture in filament turns to steam in the hotend, leading to stringing, rough or cloudy surfaces, dimensional inaccuracies, and weaker layer adhesion. Drying these materials before printing helps restore consistent extrusion, improve surface finish, and ensure parts meet their intended mechanical performance.
High-capacity filament drying for pro workflows
The Creality SpacePi X4 is built to handle demanding 3D printing environments, offering features that target both high-volume production and the specific needs of engineering filaments. Its dual independent drying chambers each accommodate up to two spools, allowing combinations such as four 1 kg spools, two 2 kg spools, or a mix of sizes. This capacity makes the SpacePi X4 well-suited for multi-material workflows where uninterrupted drying is essential.
With a maximum drying temperature of 85°C, the unit supports high-performance materials including PAHT, PC, and PA-CF. A 360° heated air circulation system ensures even heat distribution across all spools, while an active dehumidification system continuously removes moisture and regenerates the internal desiccant without the need for manual replacement.
Noise levels are kept between 46–48 dB, making it unobtrusive in workshop or office settings. The 3.2-inch color touchscreen provides quick access to built-in drying presets for common materials such as PLA, ABS, PETG, and nylon, alongside three user-defined profiles. Independent temperature and time controls for each chamber allow different materials to be processed simultaneously without compromising heat-sensitive spools.
Safety features include multiple thermal sensors, NTC temperature monitoring, and PTC thermal fuse protection, enabling automatic shutdown in the event of overheating. Additional convenient features, such as an internal LED light, sliding chamber lock, and audible completion alert, round out the package. For extended prints, the “Dry and Print” passthrough ports allow filament to be fed directly to a printer while maintaining low humidity inside the chamber.
Is the Creality SpacePi X4 Filament Dryer user-friendly?
Operating the Creality SpacePi X4 is straightforward, thanks to its touchscreen and logically organized menu system. Material-specific presets cover a range of common and engineering-grade filaments, while manual control allows precise adjustment of drying temperature (45–85°C) and time (1–48 hours). Users can store up to three custom profiles for repeat use, making it easy to maintain consistent drying settings across projects.
Loading filament is simple; each of the two independent chambers opens via a sliding lock mechanism that seals tightly to maintain low internal humidity. Each chamber can be configured separately, enabling different drying cycles to run simultaneously, a benefit when working with mixed materials that require different temperatures. If two materials are loaded into the same chamber, the system automatically applies the lower of the two temperature limits to avoid damaging heat-sensitive filaments.
The integrated “Dry and Print” feature allows filament to be fed directly from the chamber to a printer via rubber-sealed passthrough ports, reducing the risk of moisture reabsorption during printing. Live temperature and humidity readouts for each chamber provide real-time feedback throughout the drying process, and an audible beep signals the end of a cycle. Internal LED lighting, controlled manually or set to activate automatically during operation, improves spool visibility.
Material drying tests
To evaluate the Creality SpacePi X4’s performance, we tested several moisture-sensitive engineering materials, printing each in both untreated and dried conditions. The chosen models were designed to reveal moisture-related defects such as stringing, surface roughness, poor bridging, and support removal issues.
PAHT-CF (Carbon Fiber Reinforced Nylon 12)
Known for its high strength and stiffness, PAHT-CF is also highly hygroscopic. We used a GE bracket model featuring smooth curves and a prominent unsupported bridge to assess surface finish and bridging performance. In its moist state, the print showed rough textures, visible oozing on vertical seams, and severe drooping on the bridge’s underside. After 12 hours of drying at 80°C, the part exhibited smooth, consistent surfaces, clean seams, and sharply improved bridging accuracy, demonstrating the dryer’s effectiveness with high-temperature materials.
In the spike retraction test, moist PAHT-CF showed heavy oozing around thin tips, with blurred edges and poor definition caused by inconsistent extrusion. After drying, oozing was almost entirely eliminated. Edges were sharply defined, and the spikes retained their intended geometry, confirming that moisture had been disrupting retraction control.
PA6 (Nylon 6)
PA6 was tested using a functional ball joint mechanism designed for jig attachment, where dimensional accuracy and clean interlocking are critical. The untreated print suffered from heavy stringing, oozing at retraction points, a cloudy, uneven surface finish, and a compromised fit due to internal filament bubbling. Drying the material at 80°C for 10 hours produced smooth, clean surfaces, minimal stringing, uniform extrusion, and precise geometry retention, resulting in a mechanically sound, load-bearing part.
The moist PA6 spike test revealed pronounced stringing between tips, with blobs and uneven tip formation. Dried PA6 produced clean, well-defined spike points, with minimal stringing and a glossier, more uniform surface, clear evidence of restored flow control and reduced moisture interference.
PC (Polycarbonate)
Next, we printed a turbo manifold model with angular overhangs, screw holes, and heavy support usage to evaluate texture smoothness, dimensional precision, and post-processing ease. The untreated PC print displayed light surface roughness, minor delamination, and difficult support removal, particularly under overhangs. After 8 hours of drying at 80°C, the surface texture became more uniform, adhesion improved, and layer lines were cleaner. While support removal remained challenging, the dried part offered better overall consistency and a noticeably improved finish.
For PC, both moist and dried spikes printed successfully, but the moist sample featured more visible stringing and slightly inconsistent surface texture. The dried spikes were smoother and more uniform, indicating that even moderate moisture content can subtly affect polycarbonate’s extrusion stability.
PA-GF (Glass-Filled Nylon)
For PA-GF, we selected a motorcycle brake air scoop with complex airflow channels, sharp edges, and support-intensive overhangs. The moist print showed rough surfaces, fused support interfaces, and fiber pull-out during removal, compromising both appearance and strength. After 8 hours of drying at 80°C, the supports detached cleanly with minimal scarring. Its surface texture was more uniform, and fiber disruption was reduced, preserving dimensional accuracy and mechanical integrity.
The moist PA-GF spikes showed significant stringing and minor oozing at the tips, with a rougher surface overall. Drying completely eliminated stringing and oozing, producing cleaner edges and a more glassy surface finish, although very thin tips still proved challenging for the printer to render perfectly.
In every test, the SpacePi X4 reduced moisture-induced defects, enhancing both appearance and part performance. Nylon-based filaments showed the greatest improvement, with sharper detail, smoother surfaces, and consistent extrusion after drying.
Certain challenges, such as support removal with PC, remained material-dependent. Even so, the SpacePi X4’s dual independent chambers, active dehumidification, and high-temperature capability make it a strong choice for professional makers, print farms, and advanced hobbyists seeking reliable results with moisture-sensitive materials.
Technical Specification of the Creality SpacePi X4
| Parameter | Value |
| Product Name | Creality SpacePi X4 |
| Product Dimensions | 382 × 276 × 362 mm (L × W × H) |
| Package Dimensions | 453 × 350 × 330 mm (L × W × H) |
| Display Size | 3.2” (63 × 46 mm) |
| Net Weight | 5 kg |
| Rated Power | 360 W |
| Temperature Range | 45°C to 85°C |
| Drying Time Range | 1 to 48 hours |
| Maximum Capacity | 4 spools: 4×1 kg, 2×1 kg + 1×2 kg, or 2×2 kg |
| Noise Level | 46–48 dB |
| Color | Black and Grey |
| Compatible Filament Diameter | ⌀ 1.75 mm |
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Featured image shows the Creality SpacePi X4. Photo by 3D Printing Industry.
