Filament Dryer Box with Fan for 1.75/2.85/3.00mm Filament - Quiet 40W

In this review the Filament Dryer Box with Fan is assessed as a practical accessory for hobbyists and small workshops that need to revive or continually dry filament during printing. The reviewer found the unit's combination of a 40W PTC heater, adjustable temperature knob and built-in fan to be the single biggest reason to buy: it dries brittle or damp filament effectively while allowing printing without removing spools. The enclosed design and humidity display make it a simple, all-in-one solution for users working with Nylon, PLA, ABS and other hygroscopic materials.

Key Features

• Drying while printing: The box can heat and circulate air around a spool so filament is dried and fed to the printer simultaneously, reducing stringing and clogs.
• Adjustable temperature: The knob lets you set heat between 45-70C so you can match drying temperature to the filament type for safer, more reliable drying.
• Integrated humidity display: The built-in sensor and LCD show real-time humidity from 10% to 99%, helping monitor spool condition during storage or use.
• Multi-diameter compatibility: Works with standard 1.75mm, 2.85mm and 3.00mm spools and supports common materials like PLA, PETG, TPU, ABS and Nylon.
• Hot-air circulation and fan: The internal fan and circulation system spread heat evenly so the entire spool dries more consistently than with a simple heating pad.
• Durable heating element: The PTC heater offers energy-efficient, even heating that is more robust than basic PI heating pads.

Who It's For

The Filament Dryer Box is best for home makers, small shops and 3D printing enthusiasts who store multiple spools or often print with moisture-sensitive filaments like Nylon, PETG or PVA. Its ability to feed filament while maintaining a controlled low-humidity environment makes it useful when printing long jobs or when reviving older spools.

It is less appropriate for users who need to dry very large industrial spools beyond the stated inner capacity, or for those who require automated networked storage solutions; this is a compact, stand-alone unit intended for standard consumer spools.

Pros & Cons

Pros

• Effectively reduces filament moisture using a 40W PTC heater and hot-air circulation.
• Temperature knob and filament-type markings make it straightforward to choose settings for different materials.
• Built-in humidity sensor and LCD provide real-time monitoring of spool conditions.
• Compatible with 1.75mm, 2.85mm and 3.00mm spools and a variety of filament materials.

Cons

• Maximum capacity limits mean it is not suitable for larger industrial spools beyond roughly 200x70mm external size.
• The box is compact, so very wide full spools or nonstandard spool shapes may not fit comfortably.

Specifications

Brand	FIXDRY
Heater	40W PTC heater
Temperature range	45-70C (adjustable)
Filament diameters	1.75mm, 2.85mm, 3.00mm
Humidity sensor range	10% - 99% (LCD display)
Maximum external capacity	200 x 70mm (H x W)

Our Verdict

The Filament Dryer Box with Fan is a well-rounded, cost-effective accessory for hobbyists and small shops that need reliable drying and on-the-fly filament feeding. Its hot-air circulation, humidity readout and adjustable heat make it a practical choice to reduce stringing and clogging when printing with moisture-sensitive materials, offering good value for the intended small-scale user.

Frequently Asked Questions

Can I print directly from the box?
Yes, the design supports drying and feeding filament to a printer at the same time so long as the spool and filament path are set up correctly.

Which filament types are supported?
Common materials such as PLA, PETG, TPU, ABS, Nylon, PVA and wood-fill are compatible; use appropriate temperature settings for each material.

Does it show humidity?
Yes, an integrated humidity sensor and LCD display report real-time humidity between 10% and 99% to help monitor spool condition.