The best 3D printer filament dryer box depends on how many spools you need to dry and which filament types you use. The SUNLU S1 Plus is suited to adjustable single-spool drying, while the Comgrow SH02 and Creality Space Pi SE offer active heating with selectable controls. For larger workloads, the Creality Space Pi X4 holds up to four standard spools. Compare capacity, temperature range, and monitoring features before choosing.
| Product | Best For | Standout Feature |
|---|---|---|
| Comgrow Filament Dryer Box | Basic two-spool storage and drying | Holds two 1 kg spools |
| SUNLU S1 Plus | Adjustable drying settings | LCD displays temperature, time, and humidity |
| Creality Space Pi SE | Simple monitored drying | 360-degree hot-air circulation |
| Comgrow SH02 | Two-spool drying with presets | Settings for nine filament types |
| Creality Space Pi X4 | High-volume printing | Four-spool capacity and two chambers |
Comgrow Filament Dryer Box
This Comgrow dryer is best for users who want a straightforward box that can hold two 1 kg spools. Its listed inner dimensions are 9.29 by 6.49 by 9.13 inches, and it supports standard 1.75 mm and 2.85 mm filament diameters. The product description lists PLA, ABS, and silk filament among the compatible materials.
Choose this model if spool capacity and dry storage during printing matter more than detailed monitoring features. Its internal heating is designed to help keep filament dry while it is being used. A setup note is important: the machine needs to display its work state after temperature and duration are set; otherwise, the motherboard may shut down after three minutes. The listed material range is narrower than some models in this comparison.
SUNLU S1 Plus Filament Dryer
The SUNLU S1 Plus is best for buyers who want to adjust drying time and temperature and check conditions on a display. Its two-inch LCD shows temperature, time, and humidity. The dryer has a fan intended to help discharge moisture, and its adjustable temperature range is 35°C to 55°C.
Choose this box if you prefer visible readings and manual settings to a model that relies primarily on preset filament programs. The controls use separate buttons for time and temperature. Its stated temperature ceiling is lower than the 65°C or 70°C maximums listed for some other dryers here, so compare the range with the needs of your filament before buying.
Creality Space Pi SE Dryer
The Creality Space Pi SE is best for users seeking a ready-to-use dryer with a display and knob controls. It uses a PTC heater and built-in fan to circulate hot air around the chamber. The listed maximum temperature is 65°C, and the product description says it can reach that temperature within 15 minutes.
Its display tracks humidity and drying hours with a countdown timer, making it easier to monitor a drying cycle. The listing identifies PLA, PETG, ABS, ASA, and TPU as suitable filament types. Choose this model if real-time monitoring and simple operation are priorities. After drying, the manufacturer recommends storing the filament in a vacuum bag to help keep it dry.
Comgrow SH02 Two-Spool Dryer
The Comgrow SH02 is best for users who want to dry two spools and feed filament to printers through designated openings. It holds two 1 kg rolls and has two filament holes for PTFE tubes. Its 150-watt PTC heater works with a fan to circulate hot air, and the listed temperature range is 40°C to 70°C.
A key distinction is its one-key selection for nine filament types, including PLA, TPU, PETG, ABS, ASA, PVA, PC, PA, and PP. The maximum drying time is 98 hours. Choose it if presets and dual-spool capacity are useful; avoid assuming that a preset replaces checking the recommended drying conditions for your specific filament. Its capacity is two spools, not four.
Creality Space Pi X4 Dryer
The Creality Space Pi X4 is best for high-volume users who need to dry or store several spools at once. Its listed capacity is four standard 1 kg spools or two 2 kg spools, and it supports 1.75 mm and 2.85 mm filament. Two independent heating chambers can be set separately, according to the product information.
The dryer uses dual 200-watt heating chambers with a maximum temperature of 85°C. Its silicone-sealed enclosure is designed to help limit moisture reabsorption, and an illuminated window lets users view the spools. Choose this model if a four-spool format and separate chambers match your workflow. It is a larger-capacity choice than necessary for someone drying only one spool at a time.
Buying Guide: How To Choose A Filament Dryer
How many spools do you need to dry?
Match chamber capacity to your printing routine. A two-spool box can suit a small setup or two active printers, while a four-spool dryer is more practical for a high-volume workflow. Check whether the stated capacity refers to standard 1 kg spools or larger rolls.
Which temperature and controls matter?
Compare each dryer’s temperature range with the drying guidance for your filament. Adjustable controls offer flexibility, while presets can simplify selection. A display that reports temperature, time, or humidity helps you monitor conditions, but the listed features differ by model.
Will filament feed while enclosed?
If you plan to print while drying, look for filament outlets and check how many spools can feed at once. The Comgrow SH02 lists two PTFE-tube openings, while the Space Pi X4 lists eight filament holes. Confirm that the openings suit your printer arrangement before purchase.
What should you check for storage?
Drying and long-term moisture protection are related but distinct needs. Some models describe sealed storage or humidity control, while others focus on heating during printing. Consider how you will store filament between jobs, and follow the product’s instructions for loading, settings, and post-drying storage.
Frequently Asked Questions
Why use a 3D printer filament dryer box?
Filament can absorb moisture from the air. A dryer box heats filament to help remove excess moisture, which manufacturers associate with issues such as stringing, clogging, and poor layer adhesion.
Can a dryer hold filament during printing?
Some models are designed to feed filament while it remains inside the box. Check the product’s listed feed openings and capacity to confirm the setup meets your needs.
Do all dryers support the same filament types?
No. Supported materials and temperature ranges vary. Check the individual product details and the filament maker’s drying recommendations before selecting a setting.
Is a four-spool dryer necessary?
Not for every user. A four-spool model is most relevant when you need to dry or organize multiple rolls at once; a smaller box may be sufficient for a one- or two-spool workflow.