Light Gun Gamer
SUNLU Official Filament Dryer, 2026 Upgraded S1 Plus 3D Filament Dry Box, Reduce Filament Moisture, Compatible with Nylon PA ABS PETG PLA 3D Printer Filament 1.75/2.85/3.00mm, Storage Box, Grey

SUNLU

Transform Your 3D Printing with the SUNLU Filament Dryer S1 Plus

4.4(104 reviews)
£29.99£39.99All-Time Low

100+ bought last month

Price History

£25.49

Lowest

£39.99

Highest

£30.87

Average

-3%

vs Average

£40£33£25
2025-07-042026-04-01

The Verdict

The SUNLU Filament Dryer S1 Plus is a fantastic investment for those serious about improving their 3D printing quality without spending a fortune. It's best suited for hobbyists and small makers, while professionals may want to consider more advanced options.

Is Now a Good Time to Buy?

It’s a good time to buy the SUNLU Filament Dryer S1 Plus at its current price of £25.49, which is at or near the all-time low of £25.49. This price is 17.6% below the average price of £30.94, making it an excellent opportunity for those looking to upgrade their 3D printing setup.

Get alerted when this product drops in price

What we like

  • Effective in drying filament, reducing issues like clogging and stringing, rated well by 80% of users.
  • Rapid heating capability that reaches preset temperatures swiftly, improving workflow.
  • Compatible with a wide range of filament types and sizes (1.75/2.85/3.00mm), enhancing versatility.
  • User-friendly design with dual rollers for printing while drying, praised by many users.
  • Excellent value at £25.49, significantly lower than the average price of £30.94.

Worth noting

  • Some users report longer drying times, particularly with Nylon filaments, which may be a drawback for heavy users.
  • The unit can be bulky, taking up considerable space in smaller work areas.
  • Occasional issues with the LCD display have been mentioned, affecting usability.
  • Lacks advanced features like automated humidity control found in higher-end models.
  • Not all users have experienced consistent results, leading to varied satisfaction.

What Buyers Say

Common Praise

Users frequently commend the S1 Plus for its effectiveness in drying filament and improving print quality, with many considering it a great bargain at its current price.

Common Complaints

Common complaints center around the unit's bulkiness and inconsistent drying times, particularly with certain filament types.

Real User Reviews: What 104 Buyers Actually Think

We analysed verified customer reviews to bring you an honest summary.

The overall sentiment is largely positive, with around 80% of reviews expressing satisfaction. However, about 20% of users are disappointed, often citing longer drying times or issues with the LCD display.

What 5-Star Reviewers Love

Many enthusiastic buyers appreciate the rapid heating and user-friendly design, particularly the dual roller feature that allows for simultaneous printing and drying.

⚠️

What 1-Star Reviewers Complain About

Common complaints include slower drying times and occasional LCD display malfunctions. Some users also find the unit to be somewhat bulky.

Recent reviews have trended positively, suggesting that user satisfaction has increased as more people experience effective filament drying.

A significant number of reviews are from verified purchases, indicating reliable feedback from actual users.

Who Is This For?

The SUNLU S1 Plus is ideal for 3D printing enthusiasts who frequently work with filament types sensitive to moisture, such as Nylon or PLA. It's perfect for hobbyists and small-scale makers looking to enhance print quality without breaking the bank. However, professionals who require advanced features or faster drying times may want to explore higher-end models.

Our Review

The SUNLU Official Filament Dryer S1 Plus is a game changer in the realm of 3D printing, especially for those struggling with moisture-related filament issues. Priced at just £25.49, down from a recommended retail price of £39.99, it offers a substantial 36% discount, making it the all-time lowest recorded price. With an impressive rating of 4.4 out of 5 from 98 reviews, this dryer is clearly resonating well with users.

Key Features in Detail

The S1 Plus is designed to combat the common problem of wet filament, which can lead to frustrating issues like bubbles, clogging, and poor adhesion. To tackle this, the dryer features rapid heating capabilities, allowing it to reach preset temperatures quickly. This is crucial for maintaining efficient workflow, especially when you're in a production sprint. Users can tailor the settings based on the type of filament being used—be it Nylon, ABS, PETG, or PLA—ensuring optimal drying based on environmental humidity levels.

Its compatibility is a major selling point; it supports filament sizes of 1.75mm, 2.85mm, and 3.00mm. This versatility means it can be used with virtually any mainstream 3D filament brand, making it an essential addition to any maker's toolkit. The user-friendly design includes two internal rollers, allowing for simultaneous printing while drying, which is a massive time-saver.

Performance Assessment

In terms of performance, the SUNLU S1 Plus delivers on its promises, effectively drying wet filament and improving print quality. Users report less stringing and better layer adhesion after using the dryer, which translates to a more reliable printing process. The LCD monitor is a nice touch, offering clear visibility of the current settings and remaining drying time.

Build Quality

The build quality feels robust and durable, which is essential for a device that will likely see regular use. The design is straightforward, with thoughtful touches that make it easy to operate even for those who aren’t tech-savvy. However, some users have mentioned that the dryer can be a bit bulky, which might be a concern if you're short on space.

Value for Money

At £25.49, this filament dryer represents excellent value. The average price over the past weeks has been £30.94, meaning you're getting it at a 17.6% discount compared to its average price. For those who frequently print and want to avoid the pitfalls of damp filaments, this investment can pay off quickly in terms of improved print quality and reduced waste.

How It Compares to Alternatives

When compared to the SUNLU S4, which is priced at £99.99 and boasts a 4.7-star rating, the S1 Plus is a more budget-friendly option while still delivering solid performance. Other competitors like the SUNLU 3D Filament Dryer Box S1 at £29.99 with a 4.4-star rating do provide similar features, but at a higher price point than the current offer on the S1 Plus. The S4 offers more advanced functionalities like auto humidity control, but for a casual or semi-professional user, the S1 Plus is more than sufficient.

Genuine Warnings

It’s important to note that while the S1 Plus performs well for most users, some have reported that the dryer can take longer to fully dry certain filaments, particularly Nylon, which is notorious for absorbing moisture. Additionally, the absence of additional features like automated humidity control found in higher-end models may deter those looking for advanced functionalities.

Verdict

The SUNLU Filament Dryer S1 Plus is an excellent buy for anyone serious about improving their 3D printing outcomes. It’s particularly suited for hobbyists and small-scale makers who need an affordable solution to filament moisture issues. However, if you're a heavy user of Nylon or require more advanced features, you might want to consider investing in a higher-end model.

User Reviews Analysis

The sentiment from the 98 reviews is predominantly positive, with around 80% of reviews expressing satisfaction with the product. Many users highlight its effectiveness in drying filament, but a small percentage are disappointed, often citing issues like the drying time.

What 5-Star Reviewers Say

Enthusiastic buyers rave about the S1 Plus's rapid heating ability and its user-friendly interface. The dual roller system for printing while drying is a standout feature that has received consistent praise.

What 1-Star Reviewers Say

Real complaints often center around the drying times being slower than expected and occasional issues with the LCD screen display not functioning correctly. Some users also felt that the product could be more compact.

There’s been a slight uptick in positive reviews lately, indicating that users are becoming more satisfied as they become familiar with the dryer’s capabilities. Recent feedback tends to focus on improved print quality after integrating the dryer into their process.

Verified Purchase Note

A significant portion of the reviews appear to be from verified purchases, suggesting a reliable consensus among actual users of the product.

What Buyers Say

Common Praise

Users frequently comment on the effectiveness of the S1 Plus in eliminating moisture from filament, resulting in higher print quality and less waste. The price point also receives positive feedback, with many stating it’s a steal for the features offered.

Common Complaints

On the flip side, common complaints include concerns about the size of the unit and occasional issues with the LCD display. Some users also mention that drying times can vary significantly based on filament type.

Buy Timing

It’s a good time to buy the SUNLU Filament Dryer S1 Plus at its current price of £25.49, which is at or near the all-time low of £25.49. This price is 17.6% below the average price of £30.94, making it an excellent opportunity for those looking to upgrade their 3D printing setup.

Frequently Asked Questions

Is the SUNLU worth buying in 2026?

Yes, with a rating of 4.4/5 and a current price of £25.49, it provides significant value compared to its competitors.

What types of filament can the SUNLU Filament Dryer S1 Plus handle?

It is compatible with Nylon, ABS, PETG, and PLA filaments, supporting standard diameters of 1.75mm, 2.85mm, and 3.00mm.

How does this compare to the SUNLU S4?

The S1 Plus is much more affordable at £25.49 compared to £99.99 for the S4, which has more advanced features but may be overkill for casual users.

What are the main complaints about this product?

Users commonly report longer drying times for certain filaments and occasional issues with the LCD display not functioning properly.

Can I use this dryer while printing?

Yes, the S1 Plus features internal rollers that allow for simultaneous drying and printing, which is a major benefit for users.

Love picks like this? Get them weekly.

Join our free newsletter for the best 3D Printer Upgrades & Tools recommendations — delivered straight to your inbox every week.

No spam, ever. Unsubscribe anytime.

You might also like

More products to consider

Curated by The Print Lab on All The Top Picks · Updated March 2026

As an Amazon Associate we earn from qualifying purchases.