【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.

The dryer works great for me. It keeps my filament humidity down, so I have better quality prints. The unit is built with quality materials and easy to operate. Yes, I would recommend this product.

Why did you pick this product vs others?:This is an awesome product works absolutely perfectly. I love it because it keeps my filament dry and has a room for spare to keep it dry as well.Moisture level:Perfect moisture level maintenanceFilament quality:Keeps the filament ready for youAdhesion:Helps with ad Haitian propertiesQuality:This thing is built wellTemperature range:Love that it gives you the option to change the temperature as you need it

I bit the bullet on this when the creality dryer i got was dead within 5 minutes of opening the box. This one works as intended and holds 4 spools. I have not had any issues with drying or staying dry in the box. Printing from the box works and there are a lot of supported filaments. Save your time and money by getting this one. Only gripe is that I didn't get it first. I love creality printers but the dryer boxes are a no go for me.

I have been using the JAYO S1 for a while. It is the most basic of filament dryers. To say the S4 is an upgrade would not do it justice. the S4 is in a completely different category altogether.The S4 comes with a few pieces of tubing so that you can run the filament to your printer without exposing to the open air. Also included are some desiccant packets that can be placed inside the compartments under the spools to provide ongoing dehydration.Each of the 4 spool locations has an option for the filament to load out of the top or out of the end. Overall 8 different output holes. Each output is equipped with a connector that is designed to hold a bowden tube securely. For the outputs not in use SUNLU has provided small rubber plugs to keep the unit sealed.The build quality of the unit is excellent. Everything feels solid and well engineered. There is a lot of plastic, but it doesn't feel cheap or brittle, which is important given that it will be going through a lot of heating and cooling. The feet of the unit are actually metal bars instead of just plastic nubs or stick on rubber. It is this attention to detail that makes it feel like a luxury item.Getting started was really easy. I just plugged the unit in and turned it on. After selected the filament type from the menu all I had to do was let it run. The fans start circulating the heated air immediately and all the items in the display tell you the status. You can see the humidity decreasing on the display within minutes. The internal air circulation allows for very fast drying!I appreciate that the display is backlit for easy readability.My favorite feature of this unit is its ability to monitor the internal humidity and initiate drying when it rises above the selected threshold. The default is 50%, but it is can be set to your desired percentage. For humid environments this could be its best feature for sure!Of course you can adjust the temperature and humidity settings once you have selected from 1 of the 6 built in filament options. It is all very easily done from the front display and control panel. If you want you also enable an LED light to indicate when the unit is actively drying. You can also switch the unit to Fahrenheit or Celsius units for display.The unit is large, so plan for it to take up a fair amount of space. My hobby room is packed, so I had to get creative to make room for it. It is approximately 42cm L x 22cm D x 31cm H.I have seen a few other dryer on the market, but with the unit being able to actively dry 4 spools at a time, it is the best I have found.

I ordered 2 of these, and they work great. The Automatic Drying after reaching a certain humidity is a huge plus in my book. The only CON I have about them is that the filament reels have to be centered perfectly, or it does take some force to get it to come out. I have not had print issues with it, but it would be nicer if it had a nicer flow out of the box. Its only a minor annoyance and can be fixed if centered just perfect, and check that the rollers in the bottom are smooth moving.

Before you purchase look up "sunlu s4 error 2" and read some of those threads. Its basically a disposable unit because there isn't aftermarket support or replacement parts. Sunlu will ask some questions and then tell you they cant help you and that you need to go through the seller. The seller will ask you the same questions word for word then stop responding. (Have not had a reply in 3 weeks) you report it to Amazon and they say they will handle it and never do anything. I only used mine to dry new filament initially maybe twice a month for under a year.

I bought this unit because I wanted to be able to dry multiple rolls at once and the price was reasonable. Some reviewers have said you cant make it run long enough but if you put it on M2 and set the moisture level (humidity) it will run continuously automatically turning on and off. I was drying some TPU before I stored it and forgot about it for a couple days. The dryer was still kicking on and off. You have 2 exit ports for each of the 4 roll bays for drying while you print.