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

The **SUNLU Official Filament Dryer S4** is a game-changing accessory for 3D printing enthusiasts, designed to ensure optimal filament performance. This **new generation 3D printer filament dry box** helps maintain the quality of your filament by removing excess moisture that can compromise print quality. Whether you're using PLA, ABS, PETG, or other filaments, the **S4 dryer box** keeps them dry and ready for use.Featuring an **adjustable temperature control** and a **user-friendly interface**, the dryer allows you to customize settings based on the filament type. The **built-in timer** ensures consistent drying without overexposing your materials. Its compact and sleek design makes it easy to integrate into any workspace, while the **clear viewing window** lets you monitor the filament without opening the box.For those who value high-quality, consistent 3D prints, the **SUNLU Filament Dryer S4** is an indispensable tool. It helps prevent issues like stringing, bubbling, and weak layer adhesion, ensuring your prints come out perfect every time. A must-have upgrade for anyone serious about 3D printing!

Good looking unit at a reasonable price. Works well. Easy to set up and use. There is a strong smell of plastic fumes but I suppose that's to be expected. Took longer to arrive than expected though

A good dryer for most filament types. Presets for the different filaments such as PLA, PETG, ABS, ASA etc. simple touch screen operation and the filament just dries then is kept dry.4 reels is good but they all must be of the same type.You can keep the reels in this dry box and feed them directly to your machine.All we need now is this coupled with an AMS and it would be perfect.

Great quality, works well and looks nice. The scanning LED when running is a nice touch and isn't too bright of overstated. Comes with tubing etc to get the filament to your printer without ever being in the open air.I would recommend this to anyone who's having print issues: Creality printers are known for being finicky and as soon s the summer started and humidity went up, mine went haywire, wouldn't adhere, kept clogging, stringing, blobbing, but as soon as I added this to my setup everything went back to normal.I can keep 4 large rolls in here and in mode 2 (it maintians the humidity by turning on occasionally) it keeps them in perfect order. I cycle a couple of the rolls between this and my airtight storage every week which keeps that at around 20% too.I definitely wouldn't do without a dryer now, this one would be my first choice.

So, for starters, this is probably the best filament dryer around right now, especially if you want to avoid the expense of one dryer per roll.That said, it's got a couple of issues. One is just a matter of awareness, the other is more of a permanent frustration.I actually returned my first unit thinking it was faulty. When you first turn it on, the display lights up for about a second, then goes out again. If you're in a very well-lit environment, you can see that the LCD display is still showing, it's just not backlit. However, if - like me - you're doing it where it's not bathed in light, it looks like the display is blank. Unfortunately, just touching the display doesn't make it light up again - to do that you have to touch the very specific part of the display with the LCD icon for the power button... which you can't see because the display's not back-lit. However, once you know where the button area is (bottom right of display), this is no longer an issue, but a bit of a poor design nonetheless.The second issue is that the dryer has two modes. In the first, it will heat for the set amount of time (e.g. default for PLA is 6 hours), then will shut off. In the second mode, after the heat time, it will continue to work maintaining the humidity, so if the humidity rises above a target level (which you can set), the heater will come back on until the humidity drops to 20% (fixed). The trouble is, there's no option just to use this 'just keep it dry' mode without first heating it. So if you've had to unplug the dryer or had a power cut, when it's powered up again you have no choice but to first go through the heating stage. Thankfully, you can reduce this to an hour, but that's still an hour of running the heating which you might not want or need to do, and is particularly concerning as default behaviour when recovering from a power cut.Unfortunately, because this isn't a device with any sort of interface (smart phone or otherwise), there's no way for it to be updated to fix this issue, so just be aware of it as a flaw before you purchase this otherwise good dryer. Oh, and one last warning - just keep an eye on the temperatures (which are adjustable). The default drying temperature for PLA is 50°c, but my Bambu PLA specification says it starts to soften at 45°c. I've not noticed any issues with the actual filament, but the desiccant holders I'd printed in PLA and fitted in the middle of my spools had mildly deformed, so I've now reduced the drying temperature to 45°c and might even drop it to 40 to be on the safe side if I start to notice any printing issues with the filament.

I keep my abs rolls in this and on mode 2 so that it keeps the moisture down to a minimum. Printing directly from the sunlu drier is super easy and i have the 4 tubes run up the side of my printer then select which colour i need that day and feed it into my enclosure.

Well made dryer lots of options in the to use it perfectly suitable for drying multiple rolls of filament.

To be honest it does the job and does it well and currently there’s nothing similar on the market really happy with my purchase