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eSUN has launched the eBOX Plus, a four-spool filament dryer that heats to 80°C and feeds filament to your printer while it dries. It lists at $149.99 in the US, but as of Oct. 29 it’s out of stock and eSUN only takes inquiries.
That ceiling is the headline. The four-spool box we’ve covered in most depth, the SUNLU S4, stops at 70°C, and nylon is one of the filaments that needs the extra heat. The catch is in the Oct. 23 announcement: all four spools have to be the same material.
Table of Contents
eSUN eBOX Plus Specs and Price (as of Oct. 29, 2026)
| eSUN eBOX Plus (as of Oct. 29, 2026) | Detail |
|---|---|
| Price | $149.99 (US list price) |
| Availability | Out of stock on eSUN’s US store, inquiry only |
| Capacity | 4 spools of the same material |
| Max spool size | 200 mm across, 73 mm wide |
| Temperature range | 45-80°C |
| Timer | 1-99 hours |
| Heating | Dual PTC heaters, dual fans |
| Moisture control | Active venting, removable desiccant box |
| Print while drying | Yes, 4 PTFE tubes in the box |
| Screen | 2.8-inch touchscreen, tilts 45° |
| Filament diameter | 1.75 / 2.85 / 3 mm |
| Size and weight | 368 × 326 × 228 mm, 4 kg |
| US voltage | 100-120V |
What the Higher Heat Ceiling Gets You in the eSUN eBOX Plus
eSUN names PLA, PETG, ABS, and TPU as examples and claims compatibility with its full FDM range, but it hasn’t published nylon or PC drying settings yet. The four it names all dry at or below the S4’s ceiling, according to the chart in our filament dryer roundup.
| Filament | Drying temp | Time | Inside the eBOX Plus range? |
|---|---|---|---|
| PLA | 45-55°C | 4-6 h | Yes |
| PETG | 55-65°C | 4-6 h | Yes |
| TPU | 50-55°C | 4-6 h | Yes |
| ABS / ASA | 60-70°C | 4-6 h | Yes |
| Nylon (PA) | 70-80°C | 8-12 h | Yes, on paper |
| PC | 80-90°C | 6-8 h | Bottom of the band only |
The extra 10°C matters for materials eSUN doesn’t name. Nylon wants 8-12 hours near the top of a dryer’s range, and Bambu’s polycarbonate guidance calls for an eight-hour cycle at exactly the eBOX Plus maximum, which a 70°C box can’t reproduce. On paper, the eBOX Plus reaches both.
I’d hold off on calling it a nylon dryer, though. The only guidance so far is to pick temperatures “according to each filament’s specifications.” A setpoint isn’t a spool temperature either: in one reviewer’s test of the SUNLU S4, a thermal camera read about 68°C up top, roughly a dozen degrees below the reading by the bottom fan. Until someone measures the eBOX Plus at the spool, nylon and PC are a maybe.
The eSUN eBOX Plus Same-Material Rule
One chamber means one temperature. Load a PLA spool next to a PETG spool and you either dry both at a compromise setting or run two batches. The EIBOS Tetras in our roundup handles this differently, holding two lanes at different temperatures in a reviewer’s test, but it tops out at 65°C.
Spool size is the other limit. The official spec sheet caps reels at 200 mm across and 73 mm wide, so measure any 2 kg or 3 kg reel before you count on four slots.
The footprint is different from the S4’s. By my math, at 368 × 326 × 228 mm the eBOX Plus is 90 mm narrower and 84 mm lower than the S4’s 458 × 218 × 312 mm, but 108 mm deeper. Check your shelf depth.
What the eSUN eBOX Plus Means for AMS Lite, SUNLU S4, and Nylon Buyers
If you run an AMS Lite: open spools on an A1 pick up moisture between prints. The eBOX Plus ships with four PTFE tubes, and Bambu Lab and Creality printers are named for dry-while-printing. It doesn’t say whether those tubes can feed the AMS Lite’s four lanes. If you want heat on the AMS Lite itself, the SUNLU AMS Lite heater bolts on but shares the S4’s ceiling.
If you already own a SUNLU S4: keep it for drying. The four filaments eSUN names already dry within the S4’s range. The one real gap is storage: the S4’s lid has no gasket, while eSUN says it improved chamber sealing on the eBOX Plus and added a removable desiccant box.
If you print nylon or PC: the Creality Space Pi X4 already holds four spools and reaches 85°C, 5°C more than the eBOX Plus. My read is that the eBOX Plus only makes sense if it costs less, so check the Space Pi X4’s current price before you wait for eSUN’s restock. Our Black Friday 3D printer deals page rounds up current printer deals in the meantime.
eSUN eBOX Plus FAQ
How much does the eSUN eBOX Plus cost?
eSUN lists the eBOX Plus at $149.99 on its US store. As of Oct. 29, 2026, it’s out of stock and only takes inquiries, so you can’t order one yet.
What filament dryer can reach 80 degrees Celsius?
The eSUN eBOX Plus holds four spools and heats to 80 degrees Celsius. Among four-spool boxes we’ve covered, the Creality Space Pi X4 goes higher at 85°C, while the SUNLU S4 tops out 10 degrees below the eBOX Plus.
What temperature should my filament dryer be?
Match the filament: PLA dries around 45-55°C and PETG around 55-65°C. Nylon and PC need the high end of a dryer’s range, which is where 70-degree boxes fall short.
What eSUN Hasn’t Said About the eBOX Plus Yet
- Restock date in the US, and European pricing.
- Power draw and noise. The SUNLU S4 runs about 45 dB, and the eBOX Plus has two fans.
- Measured spool temperatures at the top setting.
- Nylon and PC drying times in the Master Mode presets.
- AMS compatibility for the four included PTFE tubes.
The S4 and the Space Pi X4 already bracket the eBOX Plus on heat. My guess is it makes sense only if its price lands between theirs too.
