FilaDryer S4 Pro

Dual-Zone Filament Dryer with Independent Temperature & Time Control,
85℃ Max Temperature
Drying & Annealing 2-in-1

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FilaDryer S4
The world's first high-capacity filament dryer
setting the benchmark with four-spool simultaneous drying
and trusted by over 40% of professional users.
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AMS Heater

A revolutionary, cost-effective alternative for the Bambu Lab AMS A1,

enabling drying-while-printing at less than one-third of the price.

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FilaDryer S1 Plus

The Ultimate Value, solving 80% of filament moisture problems at the lowest cost.

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Filadryer E2

The industry's first dual-function dryer, offering 110℃ high-temperature drying and model annealing for engineering materials.

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FilaDryer S2

Winner of the MUSE Design Awards Silver, featuring a smart touchscreen for elegant drying and printing integration.

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FilaDryer SP2

A modular, split-unit system for flexible multi-chamber configurations, perfect for smart space management.

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15%off Flash Deal | Choose Your 3D Printing Mates

A single drying cycle can eliminate 99.99% of 3D printing troubles.

15% OFF
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SUNLU FilaDryer S4

The World's 1st FilaDryer with a capacity of 4 spools. Temperature Balance and High Efficiency

$116.99$139.99
SUNLU FilaDryer S4
15% OFF
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SUNLU FilaDryer SP2

Split-type 3D Printer Filament Dryer. 2-IN-1 Filament Dryer Combine with Storage Box

$49.99$79.99
SUNLU FilaDryer SP2
Immediate results with the dryer box

Why do you need a filadryer?

Before drying After drying

FilaDryer Blog

Discover Our Filament Dryer - Begin Your Journey Today

The Complete Guide to SUNLU Filament Dryers

Why Every Maker Needs a Professional Filament Dryer

A Comprehensive Analysis of the SUNLU Filadryer S4

Breaking the Barrier of Printing Failure

Understand how invisible moisture leads to stringing, bubbles, and weak layer adhesion in your daily projects.

For Beginner

Scale Your Productivity

Designed for multi-printer setups and high-volume studios. Optimize your workflow with massive capacity and smart organization.

For Intermediate Users​

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Master High-Performance Materials

Unlock industrial-grade strength. Advanced high-temp drying and annealing for PA, PC, and Carbon Fiber.

For Advanced Users​

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Empowering AMS Users

From Isolated Hardware to Unified Ecosystems. Tailored for multi-brand 3D printing setups.

For AMS Users​

Canada Only - Clearance Sale 3D Printing Special Offers Collection
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The Sunlu Evolution: A Complete Filament Drying Ecosystem

  • 2022 - S1 Plus Launch

    Our journey began with the S1 Plus – making basic filament drying accessible and affordable for every maker.

  • 2022 - S2 Launch

    We upped the game with the S2, combining smart controls and award-winning design.

  • 2023 - S4 Launch

    The S4 changed the game as the world's first high-capacity dryer for four spools.

  • 2024 - E2 Launch

    The E2 tackled advanced engineering materials with high-temperature drying and annealing.

  • 2025 - SP2 Launch

    The SP2 reimagined flexibility with its innovative, modular split-unit design.

  • 2025 - AMS Heater Launch

    The AMS Heater perfected ecosystem integration, offering smart, in-line drying for popular systems.

  • 2026 - S4 Pro Launch

    SUNLU 1st Dual-Zone Filament Dryer with Independent Temperature & Time Control

Purchase & Support

What is the heating principle of SUNLU dryers? Is it safe?

Our entire lineup utilizes PTC (Positive Temperature Coefficient) ceramic heating elements paired with smart control chips. PTC technology is inherently self-regulating; as the temperature reaches the target, resistance increases and power consumption drops, preventing overheating. Additionally, our products feature built-in thermal cut-offs and multi-layer safety mechanisms, ensuring 24/7 reliability for long drying cycles.

How much does shipping cost?

Shipping is calculated based on your location and the items in your order. You will always know the shipping price before you purchase.

How do I choose the right model for me?

Follow our Quick Decision Guide:

  • By Material: PLA/ABS/PETG → S1 Plus, S2, SP2. Nylon/PC → S4 or E2.
  • By Volume: Single/Dual spools → S2, SP2. High-volume/Studios → S4.
  • By Feature: Pro-grade/Annealing → E2. Space-saving/Flexibility → SP2. Budget-friendly → S1 Plus.
  • By owning AMS (Gen 1): the AMS Heater is your ideal match.

Do the products come with a warranty?

Yes. All SUNLU filament dryers are covered by a 12-month official warranty. Our dedicated support team is always available to ensure your 3D printing experience remains seamless and worry-free.

Why do I need a filament dryer? Won't a sealed box with desiccant work?

There is a fundamental difference. A sealed box with desiccant is passive protection—it only slows down moisture absorption. A dryer is an active dehumidification device. It uses a PTC heater to generate dry heat and circulating air to strip moisture from the core of the filament. It can "revive" compromised materials (like popping PLA or brittle Nylon), restoring them to peak printing performance. For high-value engineering materials, a dryer is an indispensable tool for both maintenance and restoration.

  • Free Shipping

    Enjoy free shipping to most country and regions: the USA, Europe, the UK, Canada, and Australia.

  • Money Back Guarantee

    Payment Security Guarantee: Protect your payments with our trusted payment system.

  • Online Support 24/7

    Lifetime Support: Contact us 24hrs per day Our customer support team is available 24 hours a day

  • Trusted Service

    For order info, email to sales02@sunlu.com. For product info, email to support@sunlu.com