Filament Dryer Box S4,Four-Spool 3D Printer Dehydrator with Rapid Heating, Auto Humidity Control, and Advanced Triple Fan Upgrade,Compatible with PLA,PETG,ABS,TPU,PA
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Extended holiday returns
Returnable until Jan 31, 2026 Learn more
Returnable until Jan 31, 2026 Learn more
This item's return window has been extended for the holiday season: Returnable until Jan 31, 2026
To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.
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Availability:
In Stock.
Arrives
Thursday, Dec 18
Color: White
Features
- Four-Spool Filament Dryer Box - SUNLU S4 is the first filament dryer box capable of accommodating four 1kg spools simultaneously. It is equipped with eight filament holes and PTFE tubes, meeting the demands for drying multiple filaments and enabling concurrent printing with multiple printers.
- Fast Heating & Drying Evenly - The SUNLU S4 filament dryer is equipped with a PTC heating element and a triple-fan configuration. The interior heat is efficiently circulated with three fans, making the heating process more even. Additionally, the S4 filament dry box achieves rapid heating up to 70 C in record time. The robust 350W PTC heater is 6.9 times more powerful than the SUNLU S2, ensuring an accelerated and efficient filament drying experience.
- Auto Humidity Control - The SUNLU FilaDryer S4 incorporates a high-precision humidity sensor, displaying real-time interior humidity. Even when the filament dryer is in standby, it will automatically activate when the interior humidity reaches or exceeds 50%, preventing secondary moisture exposure. Thus, it can also serve as your filament storage box.
- Easy to Use - The adjustable temperature range is 35C to 70C, with a setting time from 0 to 99 hours. This 3D printer filament dryer features a large touch screen, providing a tablet-like operation experience. It also comes with pre-configured temperature and drying time settings for commonly used filaments such as PLA, ABS, PETG, as well as PA and PC. This reduces setup complexities and enhances your user experience.
- Universal Compatibility - The SUNLU S4 filament dehydrator is compatible with PLA, PLA+, PETG, TPU, ABS, PA, PC, Nylon, and other high-end 3D filaments. It works perfectly with all standard filament diameters: 1.75mm, 2.85mm, 3.00mm.
Brand: YOOPAI
Material: ABS Polycarbonate Polylactic Acid
Color: White
Item Weight: 12.74 Pounds
Item Diameter: 1.75 Millimeters
Manufacturer: YOOPAI3D
Brand: YOOPAI
Item Weight: 12.74 pounds
Package Dimensions: 20.4 x 14.1 x 11.4 inches
Item model number: SUNLUS4
Color: White
Material Type: ABS Polycarbonate Polylactic Acid
Number of Items: 4
Manufacturer Part Number: SUNLUS4
Date First Available: January 28, 2025
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Thursday, Dec 18
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Similar Products
Top Amazon Reviews
Color: Black
This SUNLU S4 filament dryer absolutely works like a champ. It heats up quickly, maintains a stable temperature, and the automatic humidity control is a great feature that I didn’t realize I needed until I had it. I love that it can handle four spools at once—super convenient for anyone who prints often or rotates between materials. The upgraded fans circulate air evenly, and I’ve already noticed a big improvement in print quality with moisture-sensitive filaments like PETG and TPU. The whole unit feels well-built and easy to operate. If you want a reliable, efficient filament dryer that just works, this is a great pick.
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Reviewed in the United States on December 8, 2025 by Nelly
Color: Black
Solid drier. I print a lot of filament and a single spool dryer just wasn't going to cut it for my needs. This 4 spool dryer works well and does exactly what i need. I really like that it has outlets for using as a dry and print box. I print directly from this dryer on my bed slingers and the quality had really improved printing from a dry roll. Keeping your filament dry is keep to reducing stringing and having it stay within the box helps reduce tangles. The dryer has a solid amount of preset choices for temperatures for a variety of filaments, but you can fine tune it for any specialty filament. My only wish would be that it was split and could dry 2 types of filament at the same time. However I just throw them in as a little extra temperature doesn't appear to affect my PLA when drying with PETG.
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Reviewed in the United States on November 30, 2025 by Nick..
Color: White
The dryer works great for me. It keeps my filament humidity down, so I have better quality prints. The unit is built with quality materials and easy to operate. Yes, I would recommend this product.
Reviewed in the United States on August 18, 2025 by Billy Daniels Billy Daniels
Color: Black
Why did you pick this product vs others?: This is an awesome product works absolutely perfectly. I love it because it keeps my filament dry and has a room for spare to keep it dry as well. Moisture level: Perfect moisture level maintenance Filament quality: Keeps the filament ready for you Adhesion: Helps with ad Haitian properties Quality: This thing is built well Temperature range: Love that it gives you the option to change the temperature as you need it
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Reviewed in the United States on July 7, 2025 by Papibighead
Color: Black
I ordered 2 of these, and they work great. The Automatic Drying after reaching a certain humidity is a huge plus in my book. The only CON I have about them is that the filament reels have to be centered perfectly, or it does take some force to get it to come out. I have not had print issues with it, but it would be nicer if it had a nicer flow out of the box. Its only a minor annoyance and can be fixed if centered just perfect, and check that the rollers in the bottom are smooth moving.
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Reviewed in the United States on November 16, 2024 by Chad Brandenburg
Color: Black
I bought this unit because I wanted to be able to dry multiple rolls at once and the price was reasonable. Some reviewers have said you cant make it run long enough but if you put it on M2 and set the moisture level (humidity) it will run continuously automatically turning on and off. I was drying some TPU before I stored it and forgot about it for a couple days. The dryer was still kicking on and off. You have 2 exit ports for each of the 4 roll bays for drying while you print.
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Reviewed in the United States on July 11, 2025 by K. Hughes
Color: Black
I would love to try this filament dryer but the power cable willl not stay in the inlet at ALL. If I hold it in at a certain awkward angle, the machine will power on for a split second but even then - with me holding the cable in place - it shuts down. I would guess that I've received a previously returned item and after I return this thing, someone else will receive my problem. I'm sorry in advance to that future customer. I'm not going to keep a glorified paperweight that costs over $111. I was truly looking forward to using this thing and am sorely disappointed.
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Reviewed in the United States on December 8, 2025 by LizJoe217
Color: Black
The SUNLU S4 filament dryer is a must-have for serious 3D printing. It holds up to four spools at once, keeps moisture at bay, and helps prevent clogs and stringing — especially with hygroscopic filaments like TPU and nylon. The interface is simple, the build is solid, and it runs quietly. If you print often or in bulk, this dryer box is a total workflow upgrade
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Reviewed in the United States on October 27, 2025 by David C.