---
product_id: 611803078
title: "【2025 Special Bundle】 SUNLU Official Filament Dryer Box S4,Four-Spool 3D Printer Dehydrator with Rapid Heating, Auto Humidity Control, and Advanced Triple Fan Upgrade, Fits PLA,PETG,ABS,TPU,PA,etc."
brand: "yoopai"
price: "$464.23"
currency: USD
in_stock: true
reviews_count: 8
category: "Yoopai"
url: https://www.desertcart.us/products/611803078-2025-special-bundle-sunlu-official-filament-dryer-box-s4-four
store_origin: US
region: United States of America
---

# Auto humidity control Rapid heating to 70°C 4-spool capacity 【2025 Special Bundle】 SUNLU Official Filament Dryer Box S4,Four-Spool 3D Printer Dehydrator with Rapid Heating, Auto Humidity Control, and Advanced Triple Fan Upgrade, Fits PLA,PETG,ABS,TPU,PA,etc.

**Brand:** yoopai
**Price:** $464.23
**Availability:** ✅ In Stock

## Summary

> 🔥 Keep your filament fresh, your prints flawless, and your setup ahead of the curve! 🎛️

## Quick Answers

- **What is this?** 【2025 Special Bundle】 SUNLU Official Filament Dryer Box S4,Four-Spool 3D Printer Dehydrator with Rapid Heating, Auto Humidity Control, and Advanced Triple Fan Upgrade, Fits PLA,PETG,ABS,TPU,PA,etc. by yoopai
- **How much does it cost?** $464.23 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/611803078-2025-special-bundle-sunlu-official-filament-dryer-box-s4-four)

## Best For

- yoopai enthusiasts

## Why This Product

- Trusted yoopai brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Quad-Spool Powerhouse:** Dry up to four 1kg spools simultaneously—maximize your print workflow without pause.
- • **Smart Humidity Guardian:** Auto-activates at 50%+ humidity to protect your filament from moisture damage 24/7.
- • **Turbo Heat & Triple Fan:** 350W PTC heater with triple fans ensures lightning-fast, even drying for flawless filament every time.
- • **Intuitive Touchscreen Control:** Tablet-like interface with presets for PLA, ABS, PETG & more—customize drying with ease.
- • **Universal Filament Compatibility:** Works seamlessly with all major filament types and diameters—future-proof your 3D printing arsenal.

## Overview

The SUNLU S4 Filament Dryer Box is a professional-grade 3D printing accessory designed to dry and store up to four 1kg filament spools simultaneously. Featuring a powerful 350W PTC heater and advanced triple fan system, it rapidly heats up to 70°C for even drying. Its smart humidity sensor automatically maintains optimal moisture levels, preventing filament degradation. With a large touchscreen and preset profiles for popular filaments like PLA, ABS, and PETG, it offers effortless control and universal compatibility across filament types and diameters. Ideal for serious makers seeking consistent, high-quality prints and efficient multi-spool management.

## Description

desertcart.com: 【2025 Special Bundle】 SUNLU Official Filament Dryer Box S4,Four-Spool 3D Printer Dehydrator with Rapid Heating, Auto Humidity Control, and Advanced Triple Fan Upgrade, Fits PLA,PETG,ABS,TPU,PA,etc. : Industrial & Scientific

Review: Great 4 Spool Dryer - 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.
Review: ⭐️⭐️⭐️⭐️⭐️ Fantastic Dryer — Works Like a Champ - 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.

## 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 35°C to 70°C, 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.
- After Sale Service- We provide a lifetime of professional technical support. If you encounter any issues while using it, please contact us (the seller) directly through the 'Ask a Question' feature.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0CRYDN5X9 |
| Best Sellers Rank | #10,012 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #191 in 3D Printer Accessories #402 in 3D Printing Filament |
| Brand | YOOPAI |
| Brand Name | YOOPAI |
| Color | Black |
| Customer Reviews | 4.4 out of 5 stars 780 Reviews |
| Global Trade Identification Number | 00850055848627 |
| Item Diameter | 1.25 Inches |
| Item Weight | 12.74 Pounds |
| Manufacturer | YOOPAI3D |
| Material | Acrylonitrile Butadiene Styrene, Polycarbonate, Polylactic Acid |
| Material Type | Acrylonitrile Butadiene Styrene, Polycarbonate, Polylactic Acid |
| Special Feature | Four-Spool Capacity, Rapid Heating, Auto Humidity Control |
| UPC | 850055848627 |
| Unit Count | 1.0 Count |
| Warranty Description | 2 |

## Product Details

- **Brand:** YOOPAI
- **Color:** Black
- **Item Diameter:** 1.25 Inches
- **Item Weight:** 12.74 Pounds
- **Material:** Acrylonitrile Butadiene Styrene, Polycarbonate, Polylactic Acid

## Images

![【2025 Special Bundle】 SUNLU Official Filament Dryer Box S4,Four-Spool 3D Printer Dehydrator with Rapid Heating, Auto Humidity Control, and Advanced Triple Fan Upgrade, Fits PLA,PETG,ABS,TPU,PA,etc. - Image 1](https://m.media-amazon.com/images/I/610CZIuVhDL.jpg)

## Available Options

This product comes in different **Color** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great 4 Spool Dryer
*by N***. on November 30, 2025*

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.

### ⭐⭐⭐⭐⭐ ⭐️⭐️⭐️⭐️⭐️ Fantastic Dryer — Works Like a Champ
*by N***Y on December 8, 2025*

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.

### ⭐⭐⭐⭐⭐ Great filament dryer.
*by G***N on January 9, 2026*

I have used this dryer with one roll, 2, 3 and 4 rolls at a time. Performs as expected each time. I have dried pla, petg, and abs. Make sure your spool is also rated for the drying temperature of the filament.

## Frequently Bought Together

- 【2025 Special Bundle】SUNLU Official Filament Dryer Box S4,Four-Spool 3D Printer Dehydrator with Rapid Heating, Auto Humidity Control, and Advanced Triple Fan Upgrade, Fits PLA,PETG,ABS,TPU,PA,etc.
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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-02-15*