POLYMAKER3D Printing Filament Dryer and Storage Box - PolyDryer and PolyDryer Box for Filament Drying and Sealing with Heat Control, Compatible with PA Nylon, PLA, PVB, PETG, ABS, TPU 1.75mm 2.85mm

The polydry box is very good. I tossed the provided dessicant, and went to color indicating desiccant. I added a couple of drawstring mesh bags filled with dessicant and tuck it in under the lid when it is not in use, it drives the humidity down to 15% in about 24 hours. I live near the ocean with foggy nights, so pretty damp. I added a 10mm hole out the lower back and relocated the grommet and tube for use with my Ultimaker printer, it feeds smoothly with the nice bearings. My prior home made box only stayed dry for 4 days, now the polydryer box seals are excellent and holds the dry level for several weeks at 12-15%. The PLA material no longer turns to glass and breaks apart when humid/wet, the PLA stays compliant and useable and this box really extends the useful life of the print material. The print jobs have been very consistent with no threads, reliable prints every day for weeks. Being clear all around, makes it easy to see the material level. The humidity sensor is a nice touch. Bought a couple of extra containers.

All the stars: Dryer wastes no time warming up and driving the moisture out of your filament.Read the directions as you will need to set your filament, thus your temperature setting by pressing the button below the play/pause (start) button BEFORE you start the unit. Set the time you want it to run or accept the default and it's that easy. This dryer made a noticeable difference in my print quality. Smooth layers with good adhesion.The color changing dessicant plus the seals at the bottom of the drybox ensure that you filament will stay in top shape for weeks before needing to be recharged on top of the base unit again.Not all the stars: The fan makes as much noise as your printer, so if it is the only thing running you will hear it. If other devices are running in your workroom, you probably won't notice it.I recommend it and I plan to buy more dryer units and dry boxes.

Really love the design of this filament holder. The plastic is very sturdy and feels like it would survive a drop and the front screen is really helpful to monitor the dryness of your filament. The addition of the through holes with gaskets and roller bar are there so that you can use this to feed your printer directly, something that seems really helpful for printers without an AMS. I haven't tried the dyer attachment but there are vent holes on the bottom of the container with rubber gaskets as well. It's nice to be able to see the color indicator of the desiccant and to be able to use commodity silica with indicator but filling the bin can be a little messy if you're not careful. In a future revision, it would be great if the containers could be designed to click into one another so they could be stacked.

On the whole, the dryer module is useable to me although not as good as I expected. I purchased the dryer and box and an extra box. My purpose was to be able to dry higher temp filaments like Nylons and ASA that my little Sovol box couldn't plus provide a dry box while printing actively with my printers without having to wait for long dry cycles.The dryboxes being able to be separated from the dryers and stored separately is one of the pluses with this drying system. It does reduce the cost of storage of opened filament by only having to purchase a limited number of dryers while using more dry boxes.For PLA and PETG and TPU filaments it dries well. For materials like ASA, ABS or Nylon, not so well. After test drying Polymaker's own PA6-GF25 filament I'm not too impressed.1st, the elephant in the room...This is an expensive way to dry and store filament. $80 for a dryer and 1st box then $30 per box after that! I'd suggest you dry each roll and either use it immediately in its box to printer or store in some air tight resealable bags with desicant. Storing one box per roll of filament can get real expensive with these.The dryer has very limited air movement into the boxes. All the pictures and implications show air movement in a vertically circular pattern inside the box. I found that it pretty much lightly flows from input directly to output ports only in the bottom. Only residual heat goes to the top of the spool and isn't circulated well at all. Moisture tends to collect in the front desicant and hydrometer and in the top lid. This gives a false impression of what the filament moisture actually is. You're really measuring the desicant moisture. Also the venting holes on the lower sides in the dryer arent venting out most of the moisture which stays trapped in the desicant or top lid. That will go back into the filament when the dryer is shut off and the box is removed from the dryer and sealed.Now that would be fine if you could quickly and slightly open the box to rotate the spool or open a vent on top. But the snap on top held by two huge clips are difficult to snap open at best. Also there is no motorized spool movement either. So the spool isn't heated or dried uniformly.Opening or closing the large top clips requires a good deal of force and makes a loud snap sound like you just shattered plastic. I get the impression that the clips (or worse yet) the box itself will eventually break after significant opening or closing.The heat inside the box generally doesn't get much above 50 degrees C even on it's highest setting. Its also very inconsistent in different areas of the box. Only after two or three hours of operation can it reach close to 60 degrees C on the highest setting near the box's heat inlet. Many advanced filament types need hours of 70 to 90 degrees C heating to dry properly. This box can still dry those filaments somewhat, but they will require many more hours of drying to do so.I did dry PLA just fine at the lowest setting over time. But PETG and TPU needed the second heat setting for a good deal longer than specified. But at about 12 to 18 hours they dry. I was unsuccessful at getting Polymaker's own PA6-GF25 or Qidi's UltraPA to dry enough. Even the highest setting of the heater for 24 hours wasnt enough. I could get them down to about 20% readings until the dryer was shut off and the bottom air ports were capped off for storage. But then the readings would slide back up to about 30% within a day when the trapped moisture in the box and the desicant went back into the filament.Also, I wasnt thrilled with the 3 levels of settings as one two or three nozzles. I want to see settings geared to temperature settings and durations not some arbitrary 123 nozzle kind of choice that I need a chart to decipher. Give us heater temp settings with durations.And the displays both in the dryer and box are terrible! Both displays are completely unviewable at any angle other than straight in front of the units. Move even a foot or two above, below, or to the left or right and you will see all 8s and all text displays shown at once. It means you spend a lot of time having to position your body down and directly in front of the displays just to read them. Poorly chosen displays!The fan noise of these is somewhat moderate. If you have it in a quiet room, sure it will be very noticable. But most of us will have these next to printers with several fans with much louder volumes than these.In summation, this dryer and dry box do work and will dry most low to moderate temp filaments within a 12 to 24 hour period. But I was disappointed in the fact it did not dry my higher temp filaments well even after 24 hours. And the moisture venting being below the dry box is not very effective at removing the moisture from the box. It needs a better top of the box vent that can be sealed off when stored. You might also find you will have an extra cycle to cook the installed desicant in an empty box to recharge it or that moisture will just return to the filament. I'll probably keep the dryer and two dryboxes but will only use them with PLA, PETG or TPU. Certainly not worth the $110+ I paid for themto he able to dry advanced filaments. I'll now have to spend more money trying another dryer system that can actually dry advanced filaments within a 24 hour or less timeframe.

Great system! Box seals well and the ability to lower the RH is easy with the dryer and remains stable in the storage box.