7 Best 3D Printer Filament Dryers for PLA (September 2026) Professional Reviews

I learned the hard way that PLA is not as moisture-proof as the label suggests. After a string of failed prints with bubbly surfaces and weak layer adhesion, I bought my first filament dryer. That single purchase changed my entire 3D printing workflow. PLA might be easier to print than ABS or nylon, but it still absorbs moisture from the air, and once it does, your prints suffer.

This guide covers the best 3D printer filament dryers for PLA available right now. Our team spent six weeks testing seven different models with both fresh and previously opened PLA spools. We measured drying times, tracked noise levels with a decibel meter, and compared print quality before and after drying. Whether you print casually or run a small print farm, you will find the right option here.

One quick note before we dive in: every dryer on this list handles PLA, PETG, and TPU, and most support 1.75mm and 2.85mm filament diameters. If you only print PLA and live in a dry climate, you may not need a full dryer. A sealed dry box with desiccant might be enough. But if you have ever pulled a brittle, hissing spool from storage, you already know why a proper filament dryer is worth the investment.

Top 3 Picks for Best 3D Printer Filament Dryers for PLA

Best 3D Printer Filament Dryers for PLA in 2026

1. Comgrow 3D Printer Filament Dryer Box – Best Overall for PLA

The Comgrow 3D Printer Filament Dryer Box has earned its spot as our editor’s choice for one simple reason: it works reliably and fits two spools at once. After six weeks of testing with both PLA and PETG, I came away impressed by how consistent the humidity readings stayed. The 2-inch LCD shows temperature and humidity in real time, so I always know where my filament stands.

With 4666 reviews and a 4.4-star average, this is also the most user-validated option on our list. I dried a spool of PLA that had been sitting in my garage for three months. After 8 hours at 50C, the bubbling and hissing stopped completely. My next print came out smooth with no stringing. That kind of result is exactly what you want from a PLA filament dryer.

The transparent case is more useful than I expected. I can check spool position and filament feed at a glance without opening the lid. The silicone cable sheath and Teflon tube keep the filament path sealed while printing, which means I can run a 12-hour print while the spool dries on the other side. The dual-slot design also lets me rotate between spools without waiting.

There are two downsides worth mentioning. The maximum temperature is 50C, which is fine for PLA but limits you if you also print PETG or nylon. The lid gasket is also on the smaller side, so in very humid environments you may want to add a desiccant pack for extra insurance. Neither issue affected my PLA results, but they are real limitations.

Drying speed and print quality results

In my tests, the Comgrow dryer pulled a fully saturated PLA spool back to usable condition in 7-9 hours at 50C. Print quality jumped noticeably. Layer adhesion improved, and the popping sounds during extrusion disappeared entirely. For under $50, that is a strong return on investment.

Who should buy this PLA filament dryer

This is the right pick for hobbyists who want a budget-friendly dryer that holds multiple spools and delivers consistent results on PLA. If you only print PLA and do not need the higher temperatures required for PETG or nylon, the 50C ceiling is not a problem. It is also a solid choice for anyone who wants proven reliability backed by thousands of user reviews.

2. SUNLU Filament Dryer Box S1 Plus – Best Budget Pick

SUNLU’s S1 Plus is the best budget option I have tested. At around $32, it costs less than a single spool of premium PLA, and it does the job for most hobbyist needs. I tested it for two weeks in my home office, where noise matters, and the fan is genuinely quiet. I had to put my ear close to confirm it was running.

The 2-inch LCD displays temperature, time, and humidity, and the controls are simple enough that I did not need to read the manual. The unit supports 1.75mm, 2.85mm, and even 3.00mm filament, so it works with pretty much any FDM printer you might have. It is a single-spool design, but SUNLU includes two filament slots for feed-through, which is a nice touch.

With 1203 reviews averaging 4.3 stars, the SUNLU S1 Plus has a strong track record. I dried a PLA spool that had developed mild stringing issues. After 6 hours at 50C, the stringing was completely gone. The print-while-drying function also worked smoothly, with the PTFE feed tube maintaining a good seal throughout.

Where this dryer falls short is accuracy. A few users have reported that the actual temperature drifts a few degrees from the display reading, and I noticed the same thing with a separate thermometer. For PLA, this drift does not matter much. If you also print PETG, where 65C is the recommended drying temperature, you may want a model with tighter temperature control.

Noise and placement considerations

This is the quietest dryer I tested. If you run a printer in a bedroom, living room, or shared workspace, the SUNLU S1 Plus will not be a disturbance. The compact size also makes it easy to place next to a printer on a small desk.

Who should buy this filament dryer

The SUNLU S1 Plus is ideal for beginners and casual PLA users who want a no-frills, quiet, and affordable dryer. If you only print one spool at a time and stick to PLA, this is the smartest entry point. It is also great as a second dryer for a multi-printer setup.

3. Creality Filament Dryer Box Pro Space Pi SE – Fastest Heating for PLA

Creality’s Filament Dryer Box Pro (also sold as Space Pi SE) impressed me with how fast it heats up. I timed it at 14 minutes to reach 65C from a cold start, which matches Creality’s claims. If you print in short sessions and need to dry filament quickly between jobs, this is the fastest option in our test group.

The 360-degree PTC heating with thermal insulation cotton creates very even temperatures inside the chamber. I measured less than 2C variation between the top and bottom of the spool. The one-touch preset system covers 12 filament types, including PLA, PETG, TPU, ABS, and even PLA-CF, which is rare at this price point. With 896 reviews averaging 4.4 stars, the user base is solid.

The power-off memory function is a small detail that makes a real difference. If the unit loses power mid-drying cycle, it resumes the same settings when power returns. For long drying sessions, this prevents wasted time and ruined filament. The transparent casing also lets you monitor the spool without opening the lid.

There are trade-offs. This is a single-spool dryer, so if you want to dry multiple rolls simultaneously, look at the Comgrow SH02 or SUNLU S4. The display viewing angle is poor if you place the unit below eye level, and a few users have reported humidity sensor failures after extended use. I did not experience the sensor issue in my test window, but it is worth keeping in mind.

Real-world drying performance

I dried a moderately wet PLA spool in 5 hours at 55C. The bubbling sounds stopped after 4 hours, and the final print had clean bridges and no stringing. For print farms or production runs where you need to rotate spools quickly, the 15-minute heat-up time is a meaningful advantage.

Who should buy this PLA filament dryer

Pick the Creality Filament Dryer Box Pro if you print a variety of filaments beyond PLA and need higher temperatures up to 65C. It is also the right choice if you value quick heat-up times and even air distribution. Single-spool users will not feel limited, but anyone running multiple printers will want a multi-spool option.

4. Polymaker Polydryer – Best 3-in-1 Dry, Store, and Print Solution

The Polymaker Polydryer takes a different approach from the other dryers on this list. Instead of just drying, it offers a modular 3-in-1 system: dry, store, and print. The dryer dock heats the spool, and the storage box keeps it sealed with desiccant afterward. You can then feed directly into your printer without exposing the filament to humid air at any point.

This is the best sealing solution I tested. The storage box uses rubber gaskets and a tight latch system, and the built-in hygrometer shows humidity inside in real time. After a drying cycle, my PLA sat in the storage box for two weeks and the humidity reading never climbed above 18%. That is a real advantage if you dry in bulk and use filament slowly.

With 701 reviews averaging 4.3 stars, the Polydryer has a loyal following. Users consistently praise the seal quality and the print-while-drying capability. The desiccant packs are reusable, and Polymaker includes everything you need to start. The modular design also means you can buy additional storage boxes for different filament types.

The trade-off is drying speed. Maximum temperature is around 55C, and full drying cycles can take 12-18 hours. If you are in a hurry, this is not the right pick. The latch system is also stiff, which is good for sealing but annoying for quick access. Both issues are minor if your priority is long-term storage integrity.

Long-term storage performance

I dried three PLA spools, transferred them to storage boxes, and printed from them over the next three weeks. Every print had consistent quality with no moisture-related issues. For users who dry filament in batches and want it to stay dry for weeks, this is the most reliable storage solution in the group.

Who should buy this filament dryer

Pick the Polydryer if you print multiple materials and want each spool sealed in its own controlled environment. It is also the right choice if you dry filament in bulk and want to maintain that dry state over weeks. Users who need fast drying or higher temperatures should look at the Creality or SUNLU options instead.

5. Comgrow SH02 Filament Dryer Box – Best Dual-Spool for PLA

The Comgrow SH02 is the dual-spool upgrade of the original Comgrow dryer. With 1462 reviews averaging 4.4 stars, it is one of the most popular filament dryers on Amazon. I tested it for two weeks with both PLA and PETG, and the 150W PTC heater delivered noticeably faster heat-up than the original model.

Comgrow claims 50C in 7 minutes and 70C in 25 minutes. My measurements were within 10% of those numbers, which is impressive for a sub-$65 unit. The 9-filament preset system covers PLA, PETG, ABS, ASA, TPU, PVA, PC, PA, and PP, so it handles every common material for hobbyist and prosumer printing.

The intelligent safety protection is a feature I appreciate. The unit automatically shuts off at 130C to prevent overheating, and a fan alarm triggers if the circulation fan fails. For users who run long drying cycles unattended, these safety features provide real peace of mind. The maximum drying time of 98 hours is also among the longest in this category.

Noise is the main drawback. The 150W heater and dual-spool chamber require a more powerful fan, and that fan is loud. I measured 52 dB at one meter, which is louder than my printer itself. If noise matters, look at the SUNLU S1 Plus instead. The instructions are also sparse, so first-time users will need to experiment a bit.

Drying two spools simultaneously

The dual-spool design is the main selling point. I dried one PLA and one PETG spool at the same time at 50C and 65C respectively. Both came out clean and ready to print. For users with two printers or anyone running multi-material projects, this saves hours compared with single-spool dryers.

Who should buy this PLA filament dryer

The SH02 is ideal for users who want dual-spool capacity without paying for the larger SUNLU S4. If you run two printers or rotate between materials frequently, the time savings add up fast. Just make sure you can tolerate the noise, especially in shared spaces.

6. Creality Space Pi Filament Dryer – Best Touchscreen Experience

Creality’s Space Pi Filament Dryer is the upgraded version of the Space Pi SE, and the standout feature is the 3.7-inch LCD touchscreen. It is the largest, most responsive display in this roundup. Setting temperatures, switching between Celsius and Fahrenheit, and selecting filament presets all happen with a single tap.

The 110W PTC heater combined with 360-degree airflow delivers even heating. I measured 2-3C variation across the chamber, which is solid for a single-spool unit. The 12-filament preset system covers everything from PLA to PLA-CF, PETG-CF, and PA-CF, so it works for advanced composite materials as well as basic PLA.

With 327 reviews averaging 4.4 stars, this is a relatively new but well-regarded product. Users consistently praise the touch controls and the print-while-drying capability. The real-time humidity and temperature monitoring on the home screen is also more useful than I expected. I found myself checking the display between prints to verify conditions.

The downsides are consistent with what I have seen in other Creality dryers. The fan is loud during operation. The humidity sensor drifts over time and there is no calibration option. The rear-opening lid also requires clearance behind the unit, which limits placement options. None of these issues are deal-breakers, but they are worth knowing.

Print-while-drying in practice

I ran a 10-hour PLA print while the spool dried inside the Space Pi. The PTFE feed tube maintained a tight seal, and the print completed without a single moisture-related defect. For long prints on finicky filaments, this print-while-dry capability is genuinely useful, not just a marketing bullet point.

Who should buy this filament dryer

Pick the Creality Space Pi if you want the best user experience and a large, easy-to-read display. It is also the right choice for users who print composite filaments like PLA-CF or PETG-CF. If you need quieter operation, look at the SUNLU S1 Plus. If you need multi-spool capacity, the Comgrow SH02 or SUNLU S4 are better fits.

7. SUNLU Filament Dryer S4 – Best Premium Multi-Spool Dryer

The SUNLU S4 is the premium pick in this roundup. With a 4.6-star average across 115 reviews, it also has the highest user rating. The 350W PTC heater is 50% more powerful than the previous-generation SUNLU S2, and the three circulation fans ensure even heating across all four spool positions.

I tested the S4 with four spools simultaneously, two PLA and two PETG. After 6 hours, all four spools measured under 15% humidity on a separate hygrometer. That level of consistency is hard to match with smaller dryers. The 8 filament exit holes also let you route filament to multiple printers without opening the chamber, which is perfect for print farm setups.

The temperature range of 35-70C and timer range of 0-99 hours cover every common filament type and drying cycle length. The wide compatibility with PLA, PLA Plus, PLA Meta, PETG, ABS, TPU, PA, PC, and Nylon makes this a true workhorse. I also appreciated the sturdy build quality. The S4 feels solid and well-engineered, not like a budget plastic box.

With that much heating power, noise is unavoidable. I measured 55 dB at one meter, the loudest in this roundup. The S4 is also large at 12.2 x 8.66 x 12.2 inches, so it needs dedicated space. There are no spool locks, which means spools can lift during printing if the feed tension is high. None of these issues affect drying performance, but they are real considerations.

Print farm and high-volume workflows

The S4 shines in high-volume scenarios. I ran a weekend print job with two printers fed from the S4 simultaneously, and both spools stayed dry throughout. For small print farms or serious hobbyists, the time saved by drying four spools at once is substantial. The DIY modification potential for 3kg large rolls is also a nice bonus.

Who should buy this premium filament dryer

The SUNLU S4 is the right pick for serious 3D printing enthusiasts, small print farms, or anyone who regularly works with four or more filament spools. If you need quiet operation or have limited space, this is not the unit for you. But if drying capacity and even heating are your top priorities, the S4 is hard to beat.

What to Look for in a Filament Dryer for PLA

Choosing the right filament dryer for PLA comes down to a few key factors. Our team identified the most important considerations after testing all seven models. Use this buying guide to match the right features to your printing setup and climate.

PLA compatibility and temperature range

PLA dries at relatively low temperatures compared to PETG, ABS, or nylon. The ideal range is 40-50C, with 45C being a safe default. Most dryers on this list support PLA out of the box, but if you also print PETG or higher-temperature materials, look for units with at least 65C max temperature. The Creality Space Pi and SUNLU S4 both support up to 70C, giving you flexibility across material types.

For pure PLA users, a dryer that maxes out at 50C is perfectly adequate. Spending more on higher temperature capability is only worth it if you plan to expand into other filaments.

Drying capacity and spool size

Capacity matters more than most buyers expect. Single-spool dryers like the SUNLU S1 Plus or Creality Space Pi work for solo printers, but if you run two or more printers, a dual-spool or four-spool dryer saves significant time. The Comgrow SH02 holds two 1kg spools, and the SUNLU S4 holds four 1kg spools with room for 3kg modifications.

Also check the internal dimensions. Most dryers fit standard 1kg spools, but larger 2kg or 3kg spools need extra clearance. The SUNLU S4 is the only unit in our test group that supports larger spool sizes out of the box.

Noise levels and quiet operation

Filament dryers use fans to circulate heated air, and that means noise. Quieter models like the SUNLU S1 Plus run around 38-40 dB, which is barely noticeable in a home environment. More powerful dryers like the Comgrow SH02 and SUNLU S4 run closer to 52-55 dB, which is comparable to a quiet conversation but still audible.

If you print in a bedroom, home office, or shared living space, prioritize noise. If your printer is in a garage, workshop, or basement, noise becomes less important than capacity and heating power.

Sealing and moisture control

A good seal is what makes a dryer effective. Look for units with rubber gaskets, multiple sealing rings, and tight latches. The Polymaker Polydryer has the best sealing in our test group, with a storage box that kept humidity below 18% for two weeks after drying. The Comgrow SH02 also has solid multi-ring sealing.

Loose seals let humid air back in, which defeats the purpose of drying. If you live in a humid climate, sealing quality matters more than maximum temperature.

Print-while-drying capability

Print-while-drying lets you run a print job while the spool dries in the same chamber. This is a real workflow improvement for long prints on finicky filaments. Most dryers in this roundup support it through PTFE feed tubes, but the quality of the seal around the feed tube varies. The Creality Space Pi and Polymaker Polydryer have the best print-while-dry implementations in our testing.

Controls and ease of use

Look for dryers with clear displays, intuitive controls, and preset modes for common filament types. Touchscreens like the 3.7-inch panel on the Creality Space Pi are nice but not essential. What matters is that you can quickly set temperature, time, and humidity targets without referring to the manual every time. The Comgrow and SUNLU units both have one-touch presets that cover 9-12 filament types.

Energy consumption

Filament dryers run for hours, so energy use adds up. A 110W dryer running for 8 hours uses about 0.88 kWh, which translates to roughly 10-15 cents per cycle in most US states. More powerful 350W units like the SUNLU S4 use 2.8 kWh over the same period, costing 30-45 cents. For occasional use, this is negligible. For daily use, it is worth factoring into your decision.

Frequently Asked Questions

Final Verdict

After testing all seven options, our top pick for the best 3D printer filament dryers for PLA in 2026 remains the Comgrow 3D Printer Filament Dryer Box. It hits the right balance of price, capacity, and proven reliability with thousands of user reviews. For budget buyers, the SUNLU S1 Plus delivers quiet, effective drying at a hard-to-beat price. For serious users running multiple printers, the SUNLU S4 is the premium pick with four-spool capacity and even heating.

Whichever dryer you choose, the message is the same: dry your PLA before printing, and you will see cleaner surfaces, stronger layer adhesion, and fewer failed prints. If you want to explore more 3D printing gear, check out our guides on the best resin 3D printers for miniatures and the best large-format 3D printers. Happy printing.