# Filament Dryer Sunlu S4 by Sunlu – filament moisture dryer for 3D printing spools

**URL:** https://aio.lv/en/product--sunlu-fila-dryer-s4--12394538
**Data updated:** 2026-04-25 14:14 (EEST)
**Category:** 3D Printers
**Manufacturer:** Sunlu
**Manufacturer code:** Fila Dryer S4
**EAN:** 6933582312640
**Warranty:** 1 Year
**Availability:** Available for order
**Price:** 126.49 €
**Prices and availability valid until:** 2026-08-09 23:59
**Price without VAT (21%):** 104.54 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--sunlu-fila-dryer-s4--12394538

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 27.07.2026 | free |
| Pickup points | 30.07.2026 | 1.89 EUR |
| Courier delivery to door | 30.07.2026 | 4.99 EUR |

## Summary description

Sunlu S4 Filament Dryer is a dedicated filament moisture dryer designed for 3D printing spools. Manufactured by Sunlu (MPN: Fila Dryer S4), it removes and prevents moisture in filament to improve print quality and reduce defects like bubbling or poor layer adhesion. Suitable for storage and pre-print drying of common filament spools to ensure consistent extrusion and reliable prints.

## Long description

The Sunlu S4 Filament Dryer is a dedicated filament moisture dryer designed for 3D printing spools. It can dry up to four 1 kg spools at once and supports simultaneous feeding to multiple printers. With a PTC heater rated at 320–330 W, fast warm-up (about 30 minutes to 50°C) and a maximum temperature of 70°C, the unit delivers uniform drying for hygroscopic materials including PA and PC. The built-in humidity control, touchscreen interface, eight filament outlets and predefined material profiles simplify preparation and storage of filaments.
Advantages
The Sunlu S4 combines high capacity and fast heating to reduce filament preparation time while maintaining stable internal temperature within ±3°C thanks to a three-fan circulation system. Automatic humidity control starts and stops drying based on set ranges, ensuring filaments are kept at optimal moisture levels without constant supervision. Broad material and diameter support plus multiple outlets allow flexible use in multi-printer or multicolor workflows.
Suitable for
Preparation and storage of standard 3D printing filaments (PLA, ABS, PETG, TPU, PA, PC)
Workflows with multiple printers or multicolor printing requiring several spools ready simultaneously
Users needing automated humidity control for consistent extrusion and fewer print defects
When it may not be suitable
The S4 is optimized for spool drying and may be oversized for users who only print occasionally with a single spool. It’s not intended as a general-purpose oven and should not be used to dry objects or materials not specified by the manufacturer. Also, maximum temperature is 70°C, so it may not reach the higher temperatures some specialty materials require.
Key specifications
Capacity: up to 4 spools (1 kg each)
Internal dimensions: 450 × 210 × 211 mm
Device dimensions: 516 × 278 × 350 mm
Rated power: 320–330 W (PTC heater)
Power supply: AC 100–240 V, 50–60 Hz
Maximum temperature: 70°C; heating to 50°C in approx. 30 minutes
Temperature stability: ±3°C with three-fan circulation
Automatic humidity control (starts at 30–50%, stops at approx. 25%)
Supported filament diameters: 1.75 mm, 2.85 mm, 3.00 mm
Supported materials: PLA, ABS, PETG, TPU, PA, PC
Number of filament outlets: 8 (compatible with PTFE tubes)
Display: touchscreen LCD
Net weight: 4.8 kg; gross weight: 5.5 kg
How to use
Place up to four filament spools inside the chamber and route filament through the PTFE tubes to the required outlets if feeding printers directly. Set the desired material profile or temperature and humidity thresholds on the touchscreen. The automatic humidity control will start drying when humidity rises above the configured range and stop when conditions reach approximately 25% relative humidity. Monitor the touchscreen for real-time temperature and status; the device provides safety monitoring via temperature sensors and software protection.
What to consider before purchase
Confirm the maximum spool diameter fits within the internal dimensions (450 × 210 × 211 mm).
Ensure the maximum temperature of 70°C meets the drying requirements of the filament types you use.
Plan for power compatibility: AC 100–240 V, 50–60 Hz.
Decide whether eight outlets and multi-printer feeding are required for your workflow.
Usage recommendations
For consistent results, use the predefined material profiles when available, check that PTFE tubes are properly connected for direct printer feeding, and avoid opening the chamber during active drying cycles to maintain temperature and humidity stability.

## FAQ

### How much does the Filament Dryer Sunlu S4 cost, and is it available for purchase?

The price is 126.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 45 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 27.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay, Installment. All transactions are 100% secure and encrypted.

### Can Filament Dryer Sunlu S4 be purchased with a lease?

Yes, the purchase is available both on credit and with an interest-free installment plan. Learn more about installments and credit options: https://aio.lv/en/payment#b3

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All Sunlu products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized Sunlu service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

## Image

https://aio.lv/img/cache/product/12394538/68509300_large.webp