【2025 Special Bundle】SUNLU Official Filament Dryer Box S4,Four-Spool 3D Printer Dehydrator with Rapid Heating, Auto Humidity Control, and Advanced Triple Fan Upgrade, Fits PLA,PETG,ABS,TPU,PA,etc.

I did quite a bit of research before selecting this particular dryer and use it with much success with PETG filament. Nice thing about it is that it holds 4 rolls of filament. Has many customizable features such as time, heat levels and even type of filament. Not too noisy either. Also has a hygrometer to tell you the humidity level. If you are struggling printing PETG or the newer easy to print versions of PETG, this might help.

Works great. I like the storage feature but will generally redry just prior to use. I don’t use the feed feature currently and only use this for drying/storage. Because of that, I can fit 6 of the sunlu rolls in the dryer with no issues. Only 4 fit when feeding printers from the unit, as stated in the specs.

Works great. I like the storage feature but will generally redry just prior to use. I don’t use the feed feature currently and only use this for drying/storage. Because of that, I can fit 6 of the sunlu rolls in the dryer with no issues. Only 4 fit when feeding printers from the unit, as stated in the specs.

Summer is here and so is the humidity. The dryer has been very helpful in keeping the filament ready for printing.

This is a wonderful quad roll heater… it would be even better if the LEDs still worked after a week. Box simply works, but the manual is less than comprehensive. Still, it’s probably one of the better products out there for heating multiple roles of filament, and allowing them to be used or printed directly from the filament heater box.

This large footprint dryer is perfect for me. With a Bambu X1C, I often have the need to dry up to 4 rolls of filament at a time and this fits my needs.Have had no issues with any prints after drying rolls. Dries all my different filament types, PLA PETG and TPU.If you need a dryer that has room for 4 rolls at a time, this is a perfect dryer.

I purchased this filament dryer and was quite excited while awaiting its arrival. Upon arrival the two lids were broken off even though there was no damage to the package. The lids are held on by one pin on each side both of which were bent when the lids came off. With my pliers I was able to straighten them out and reinstalled the lids.Drying: This dryer does an awesome job at drying the filaments and was almost plug and play.Feeding: The major issue seems to be with printing from a filament that was in this dry box. I started having major under extrusion which made me investigate. I then realize that it is a nightmare to try and print from this box. It seemed that the bearings don't spin freely which caused the full spools to twist and falloff the rollers. The position of the ptfe holes in relation to the spool creates addition friction that my extruder just cannot overcome.Conclusion: If you are looking to just dry your filament, then this box will get that done no problem. However, of you want to print from the box, then this is not the box for you. I will return this item because one of the reasons why I purchased it was to be able to print directly from the dry box.

After I bought this I seen it in many YouTube videos. It works great. It moves heated air around the filament and dries it very well.