I live in a humid state, which means every roll of filament I own spends its life trying to absorb the air. I bought the Sovol SH01 filament dryer in March 2023 and it has been running in my setup ever since, holding my two go-to filaments dry. A dryer is a simple machine — it warms a sealed box and pulls moisture out of the air — so there was never much to get wrong, and this one gets it right.
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Quick verdict
For what a filament dryer is asked to do, this is as good and as cheap as it gets. It holds a set temperature, it shows you the humidity inside the box, it stores filament when the power is off, and it has given me no trouble in three and a half years of regular use. I have no plans to replace it, and no reason to own a second one — it is my first and last filament dryer. If you print in a humid climate and you’ve been fighting brittle filament and bad layer adhesion, this is the fix. check current price on Amazon
Why I bought it
The problem was the climate, not the printer. Filament is hygroscopic — it pulls moisture out of the air — and where I live there is plenty of moisture to pull. Wet filament prints badly: the surface comes out rough, layers don’t bond the way they should, and older rolls get brittle enough to snap at the extruder. I had gone through all of the usual advice about storing rolls in bags with desiccant, and it helped, but it didn’t dry anything that had already taken on water.
What I wanted was a box that heats and holds a spool, tells me what the humidity is, and doesn’t need me to babysit it. I didn’t want to think about it again after setup. The SH01 does exactly that, and it cost about what you’d pay for a food dehydrator, which is the other route people take.
I picked it over the alternatives for a boring reason: it’s a simple machine, so finding a good one isn’t complicated. There’s a heating element, a fan, a sealed lid, a timer and a display. Either those work or they don’t, and this one worked from the first spool to the hundredth.
What it’s like to use
You set a temperature of 40°C, 45°C or 50°C, set a timer between 6 and 12 hours, and walk away. The display shows the temperature and the humidity inside the box in real time, so you can watch the number fall and know when a roll is actually dry rather than guessing. The listing notes that in a room below 16°C the box may not reach 50°C — that won’t reduce the drying effect, so don’t panic if the number tops out early on a cold day.
The part I use most is the sealed lid. Silicone and PTFE gaskets mean the box is airtight, so it does two jobs at once: it dries filament and it stores it. My two go-to filaments live in there permanently, dry and ready whenever I start a print. The listing also mentions you can drop up to four bags of desiccant inside for extra drying power, though those aren’t included and I haven’t needed them.
Capacity is worth checking against your own rolls before you buy. The listing says it takes two rolls under 70mm wide, or one roll under 150mm wide. My standard spools fit two at a time, which is what I use it for. One small habit worth keeping: the listing asks you to open the PTFE seals on the top of the box while it’s heating so moisture can escape, then close them again afterwards. That’s the only thing you have to remember, and it takes a second.
It handles both filament diameters, so my 1.75mm rolls and any 2.85mm material I bring in will both dry in it. As for reliability, there isn’t much to report, which is the report: three and a half years of soaking wet air and the thing still heats, still seals, still prints dry filament. No error messages, no warped lid, no failed batch.
Key specs
| Model | Sovol SH01 filament dryer |
|---|---|
| Filament sizes | 1.75mm and 2.85mm |
| Materials | PLA, PETG, TPU, ABS |
| Temperature settings | 40°C, 45°C, 50°C |
| Timer | 6 to 12 hours |
| Monitoring | Real-time temperature and humidity display inside the dry box |
| Capacity | 2 rolls under 70mm wide, or 1 roll under 150mm wide |
| Seal | Silicone and PTFE gaskets for airtight power-off storage |
| Desiccant | Holds up to 4 desiccant bags (not included) |
| Airflow | Built-in fan for even heating |
| Cold-room note | Below 16°C room temperature it may not reach 50°C; drying effect is not reduced |
Nothing on that list is exciting, and that’s the appeal — no cartridges, no consumables, no app. check current price on Amazon
Who should skip it
Skip it if you don’t actually have a moisture problem — in a dry climate, sealed bags and desiccant are enough and a dryer is a luxury. Skip it if you need to dry a lot of spools at once, or if your rolls are wider than the sizes above, because this box holds two. And if you’re looking for a machine to fix bad prints that aren’t caused by wet filament, the dryer isn’t your problem.
FAQ
How many filament spools fit in the Sovol SH01?
The listing rates it for two rolls under 70mm wide, or one roll under 150mm wide. In practice that covers standard 1kg spools two at a time, which is how I run mine — my two go-to filaments stay in the box permanently. If you print from larger or unusually wide spools, measure before you buy.
Can the SH01 keep filament dry when it’s switched off?
Yes. The lid seals with silicone and PTFE gaskets, so the box stays airtight without power and protects filament from moisture and dust between prints. That’s the main reason mine is always in use — it’s a dry box that happens to heat, not just a heater you fill when a roll goes bad.
What filament types and sizes does the Sovol dryer work with?
The listing covers 1.75mm and 2.85mm filament and names PLA, PETG, TPU and ABS. You choose between 40°C, 45°C and 50°C and a timer of 6 to 12 hours, then leave it. As with any dryer, softer materials and older rolls benefit most, because they’ve had the longest to soak up moisture.
Bottom line
A filament dryer isn’t a complicated purchase, so the bar is simply: does it heat, seal and last, and does it cost sensible money. The Sovol SH01 has done all three in a humid climate for three and a half years, and it holds my two main filaments dry so a print is never ruined by moisture. That’s the entire requirement, which is why I’m not shopping for another one. check current price on Amazon