---
product_id: 625947766
title: "SUNLU Official Filament Dryer S4, 3D Printer Filament Dry Box, Upgraded 4-Spool Filament Dehydrator, Auto Humidity Control/Fast Heating/Temperature Balance, Filaments Storage Box White"
brand: "sunlu"
price: "R9707"
currency: ZAR
in_stock: true
reviews_count: 13
category: "Sunlu"
url: https://www.desertcart.co.za/products/625947766-sunlu-official-filament-dryer-s4-3d-printer-filament-dry-box
store_origin: ZA
region: South Africa
---

# 350W rapid heating 3 fans for uniform drying 4 spools capacity SUNLU Official Filament Dryer S4, 3D Printer Filament Dry Box, Upgraded 4-Spool Filament Dehydrator, Auto Humidity Control/Fast Heating/Temperature Balance, Filaments Storage Box White

**Brand:** sunlu
**Price:** R9707
**Availability:** ✅ In Stock

## Summary

> 🔥 Keep your filament fresh, your prints flawless, and your 3D game ahead of the curve! 🎯

## Quick Answers

- **What is this?** SUNLU Official Filament Dryer S4, 3D Printer Filament Dry Box, Upgraded 4-Spool Filament Dehydrator, Auto Humidity Control/Fast Heating/Temperature Balance, Filaments Storage Box White by sunlu
- **How much does it cost?** R9707 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/625947766-sunlu-official-filament-dryer-s4-3d-printer-filament-dry-box)

## Best For

- sunlu enthusiasts

## Why This Product

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

## Key Features

- • **Multi-Spool Mastery:** Dry up to 4 filament spools simultaneously for uninterrupted, multi-color 3D printing freedom.
- • **Lightning-Fast Heat-Up:** 350W PTC heater powers from 25℃ to 50℃ in just 30 minutes—50% faster than competitors.
- • **Triple-Layer Safety Shield:** PTC, temperature switch, and software protection combine for real-time, worry-free temperature control.
- • **Smart Auto Humidity Control:** Automatically starts/stops drying between 30%-50% humidity to prevent filament damage and optimize print quality.
- • **Precision Drying with Triple Fans:** Three built-in fans maintain ±3℃ temperature balance, ensuring every filament inch is perfectly dried.

## Overview

The SUNLU Official Filament Dryer S4 is a cutting-edge 3D printer filament dry box designed to handle 4 spools simultaneously. Featuring a powerful 350W PTC heater, it heats up 50% faster than typical dryers, while triple fans ensure uniform drying with precise temperature control within ±3℃. Its smart auto humidity system maintains optimal filament moisture levels, preventing print failures. Enhanced with triple safety protections, this sleek white storage box guarantees worry-free, professional-grade filament conditioning for millennial makers and managers who demand efficiency and reliability.

## Description

Product Description SUNLU S4 FilaDryer — New Generation Filament Dryer Box

Review: Great drier. - This is brilliant. It works well and because it takes four spools it helps to reduce the amount of time taken to reduce moisture as opposed to my previous Sunlu, which only takes one spool. (I can therefore dry 5 spools at one time) It's well worth the purchase price. The noise level is acceptable but when working on the PC for models, it's barely noticeable. It's relatively easy to use although the screen could be less dimly backlit when not programming and is drying spools.
Review: Well Impressed - I have no idea how I managed without this dryer it has helped save a tonne of filament, controls are easy to use has different filament options that need set manually first time round and can print while drying so very happy with it.

## Features

- ①【4 Spools in 1 Box】Experience uninterrupted 3D printing with SUNLU New S4 Filadryer– the first filament dryer box that effortlessly handles 4 spools 1KG 3D Printer Filament simultaneously.With the new generation filament drying box, we can embrace the freedom of multi-color and multi-machine 3d printing.
- ②【Updraded Lightning-Fast Heating】Get to heating quicker with the S4 filament dry box's impressive 350W PTC heater. In just 30 minutes, it heats up from 25℃ to 50℃, ensuring 50% faster and more efficient heating than other filament dryer box in the market. Efficiency meets speed for a next-generation 3d printing experience.
- ③【Triple Security for Worry-free Printing】Rest easy knowing the S4 filament storage box prioritizes your safety. Its triple-layer security – PTC, temperature switch, and software protection – keeps a vigilant eye on temperatures, ensuring a worry-free 3d printing environment with real-time alerts for any unexpected changes.
- ④【Triple Fans for Uniform Drying】SUNLU New generation S4 filament dehydratorr equipped with three build-in fans – two circulating fans on the sides and 1 on the bottom. It maintains a temperature balance inside the box within ±3℃, guaranteeing optimal drying for every section of the filament. Efficiently rescue your wet filaments.
- ⑤【Smart Auto Humidity Control】3D printing users can adjust the internal humidity by mode 2(humidity range 30%~50%). The S4 dryer will auto start drying when humidity hits your desired range, ensuring your filament stays dry. And will stop drying when humidity below 25%, catering to avoid excessive drying of the filament.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | SUNLU |
| Colour | White S4 |
| Compatible devices | Laptop, Desktop |
| Item weight | 4 Kilograms |
| Material | Plastic Filament |
| Product dimensions | 21.1D x 21W x 21.1H centimetres |

## Product Details

- **Brand:** SUNLU
- **Colour:** White S4
- **Item weight:** 4 Kilograms
- **Material:** Plastic Filament
- **Product dimensions:** 21.1D x 21W x 21.1H centimetres

## Images

![SUNLU Official Filament Dryer S4, 3D Printer Filament Dry Box, Upgraded 4-Spool Filament Dehydrator, Auto Humidity Control/Fast Heating/Temperature Balance, Filaments Storage Box White - Image 1](https://m.media-amazon.com/images/I/61wMFCieieL.jpg)
![SUNLU Official Filament Dryer S4, 3D Printer Filament Dry Box, Upgraded 4-Spool Filament Dehydrator, Auto Humidity Control/Fast Heating/Temperature Balance, Filaments Storage Box White - Image 2](https://m.media-amazon.com/images/I/71qKO7FOH1L.jpg)
![SUNLU Official Filament Dryer S4, 3D Printer Filament Dry Box, Upgraded 4-Spool Filament Dehydrator, Auto Humidity Control/Fast Heating/Temperature Balance, Filaments Storage Box White - Image 3](https://m.media-amazon.com/images/I/71y6HP6vTXL.jpg)
![SUNLU Official Filament Dryer S4, 3D Printer Filament Dry Box, Upgraded 4-Spool Filament Dehydrator, Auto Humidity Control/Fast Heating/Temperature Balance, Filaments Storage Box White - Image 4](https://m.media-amazon.com/images/I/71PoEoeASVL.jpg)
![SUNLU Official Filament Dryer S4, 3D Printer Filament Dry Box, Upgraded 4-Spool Filament Dehydrator, Auto Humidity Control/Fast Heating/Temperature Balance, Filaments Storage Box White - Image 5](https://m.media-amazon.com/images/I/71+EB+OSoHL.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great drier.
*by M***K on 26 August 2026*

This is brilliant. It works well and because it takes four spools it helps to reduce the amount of time taken to reduce moisture as opposed to my previous Sunlu, which only takes one spool. (I can therefore dry 5 spools at one time) It's well worth the purchase price. The noise level is acceptable but when working on the PC for models, it's barely noticeable. It's relatively easy to use although the screen could be less dimly backlit when not programming and is drying spools.

### ⭐⭐⭐⭐⭐ Well Impressed
*by A***Y on 7 September 2026*

I have no idea how I managed without this dryer it has helped save a tonne of filament, controls are easy to use has different filament options that need set manually first time round and can print while drying so very happy with it.

### ⭐⭐⭐⭐⭐ Good Dryer
*by B***D on 3 May 2026*

I've had this for about 6 months. It drys filament very well and is very cheap on electricity (maybe 1p-2p and hour GBP). It take four reals and has ports where the filament can remain in the device, but can fees into my 3D printer.

## Frequently Bought Together

- SUNLU Official Filament Dryer S4, 2025 Newest 3D Printer Filament Dry Box, Upgraded 4-Spool Filament Dehydrator, Auto Humidity Control/Fast Heating/Temperature Balance, Filaments Storage Box White
- ELEGOO PLA+ Filament 1.75mm Black 1KG, PLA Plus Tougher and Stronger 3D Printer Filament, Dimensional Accuracy +/- 0.02mm, 1kg Cardboard Spool(2.2lbs) for Most FDM 3D Printers

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*Product available on Desertcart South Africa*
*Store origin: ZA*
*Last updated: 2026-09-30*