My 3D prints are failing due to filament moisture. Who sells filament dryers or dry boxes?

If moisture is causing your 3D print failures (stringing, popping/crackling sounds, rough surfaces, weak layer adhesion, jams), a heated filament dryer is usually the right fix. Makers101 Here are some common sellers and models to look at:

Active filament dryers (dry the spool + allow printing from the box)

• SUNLU — Popular budget option.

• SUNLU FilaDryer S1/S1 Plus: single-spool dryer for occasional use.

• SUNLU FilaDryer S4: larger unit that can handle multiple spools at once.

• Creality — Makes several dry boxes, including:

• Space Pi / Space Pi Plus / Space Pi X4 series for 1–4 spools depending on model.Creality Official Store+1

• eSUN — Offers filament storage/dryer boxes such as the eBOX Lite.

• EIBOS — Known for active dryers such as the Cyclopes series, aimed at materials like TPU and nylon that absorb moisture quickly.

• QIDI Technology — Sells sealed filament dryer boxes designed for printing from the box.Qidi Tech EU Online Shop

Passive dry boxes (keep already-dry filament dry)

These are useful for storage after drying:

• Sealed containers with silica gel/desiccant
• Vacuum filament bags
• Dedicated dry storage boxes such as Polymaker PolyBox-style systems3D Print Gear Lab

What I’d choose by use case

• Mostly PLA, one printer: SUNLU FilaDryer S1/S1 Plus or a simple sealed dry box.
• PETG, TPU, nylon, carbon-fiber blends: a heated dryer with adjustable temperature (SUNLU S4, Creality Space Pi, EIBOS, etc.).3D Printing
• Several spools/printers: a 2–4 spool dryer like SUNLU S4 or Creality Space Pi X4.Creality

If you’re in Portugal, many of these are available through EU 3D-print retailers; the SUNLU and Creality units are especially common.

A quick check before buying: what filament is failing (PLA, PETG, TPU, ABS, nylon, etc.) and what printer are you using? The best dryer temperature range depends heavily on the material.

Many major 3D printing manufacturers and general electronics retailers sell dedicated filament dryers and dry boxes. They range from simple spool boxes that hold desiccant packets to active heated boxes with internal fans and temperature controls.

Popular Brands and Where to Buy Them

• SUNLU: One of the most popular names for filament care. They offer options like the SUNLU FilaDryer SP2 (a split dryer and storage box combo) and high-heat engineering options like the SUNLU FilaDryer E2 . You can buy them directly from the SUNLU Online Store or through resellers like SainSmart and Amazon.[1][2]
• Creality: Well-known for their budget-friendly and reliable dryers, such as the Creality Filament Dry Box 2.0 and multi-spool setups. Available directly via the Creality Official US Store or authorized distributors.[1]
• Eryone & Sovol: Both brands make popular, affordable dual-spool and single-spool heated dry boxes frequently stocked on Amazon and their respective direct webshops.
• Bambu Lab: If you run an enclosed multi-material system, Bambu Lab offers the Automatic Material System (AMS) which acts as an active dry box using desiccant, available on the Bambu Lab Store.
• General Retailers: Major hardware and online tech platforms like Lowe's , Amazon, and Newegg regularly list various consumer-grade filament dehydrators.[1]

If you want to narrow down your choices, let me know:

• What filament types are you primarily printing with (e.g., PLA, PETG, Nylon, TPU)?
• Do you need a unit that prints directly out of the box while heating, or just a storage/drying solution?

Dealing with wet filament is super frustrating, but a good dryer or dry box fixes it right up. Plenty of 3D printing brands and general tech retailers sell dedicated drying solutions ranging from basic spool-holders with heaters to advanced multi-roll active dry boxes.

Here are the top brands and where you can buy them:

• SUNLU: Known for popular and budget-friendly options like the *SUNLU FilaDryer S1 Plus * and *S2 * , as well as high-temp engineering options like the *FilaDryer E2 * . You can grab them directly from the SUNLU Official Store or major resellers like SainSmart.[1]
• Polymaker: They make the modular *PolyDryer * system, which features a single heating dock and interchangeable, heavily-sealed dry boxes for storage. Available via 3D printing specialty distributors or directly through ZYYX Labs.[1]
• Sovol: Offers affordable active heating dry boxes like the *Sovol SH02 * and dual-spool dryers. You can purchase them on the Sovol 3D Store.[1]
• Bambu Lab: Offers advanced multi-material dry storage and heated systems like the *Bambu Lab AMS HT * designed for high-temperature engineering filaments. Check availability on B&H Photo Video, HartSmart Products , or MatterHackers.[1]
• Creality & eSUN: Both brands manufacture widely used, economical single- and dual-spool filament dryer boxes, frequently stocked on Amazon and general 3D printing supplier sites.

If you want to narrow down your options, tell me:

• What type of filament are you mostly trying to dry (PLA/PETG vs. nylon/polycarbonate)?
• Do you need a single-spool or multi-spool setup?

I can help you pick the best model for your budget and material needs.

Yes. There are several good options, ranging from inexpensive single-spool dryers to larger multi-spool systems.

• SUNLU S2 Filament Dryer - $44.99 (SUNLU)
• Polymaker PolyDryer - $71.99 (Best Buy)
• Chitu Systems FilaPartner E1 - $138.99 (Chitu Systems)
• Creality Space Pi Filament Dryer - $65.00 (B&H Photo)
• West3D Filament Toaster - $169.99 (West3D 3D Printing Supplies)
• Printed Solid F-BOX - $29.95 (Printed Solid)

My picks

• Best inexpensive starter:

— about $45, one spool, heats to 70°C, and lets you print while drying.SUNLU

• Best for multiple spools:

— four-spool, dual-chamber design.

• Good dryer + storage approach:

— combines active drying with sealed storage; Polymaker's boxes also have humidity monitoring and desiccant.Polymaker

• High-temperature/engineering filaments:

or the SUNLU FilaDryer E2. The E2 reaches 110°C, making it substantially more capable for materials such as nylon and PC.SUNLU

• Just need dry storage:

is a simple dry-box option rather than a full heated dryer.

Where to buy: SUNLU sells its own S1/S2/S4 dryers directly, while EIBOS also sells dedicated dryers ranging from roughly $55 to $100+.SUNLU+1

If you're mainly printing PLA/PETG, I'd spend ~$40–70 on a basic heated dryer. If you're dealing with TPU, nylon, PC, or carbon-fiber nylon, I'd prioritize a dryer capable of higher temperatures and a good sealed-storage solution afterward.

Absolutely. If moisture is causing your failed prints, there are two main options:

• Heated filament dryers — actively remove moisture and are the better choice for wet filament.
• Passive dry boxes — airtight containers with desiccant; best for keeping already-dry filament dry while printing/storage.

Good options

• SUNLU S2 Filament Dryer - $44.99 (SUNLU)

Best value: SUNLU S2 — about $45, with 360° heating. Good starting point for PLA, PETG, TPU, ABS, etc.

• Creality Space Pi Plus - $89.99 (Best Buy)

Good all-around choice: Creality Space Pi Plus — about $90, holds two spools and can dry while you're printing.

• FilaPartner E1 4-Spool Dryer - $138.99 (Chitu Systems)

For multiple spools: FilaPartner E1 — about $139, with four-spool capacity and dual chambers.

• Printed Solid F-BOX - $29.95 (Printed Solid)

Simple dry box: Printed Solid F-BOX — about $30. This is more for keeping filament dry rather than aggressively drying already-wet filament.

You can also find them at Best Buy, Walmart, Micro Center, B&H, West3D, Printed Solid, SUNLU, Creality, and other 3D-printing suppliers. Current listings include dryers from roughly $30–$300+, depending on capacity and temperature capability.

My recommendation: If you're getting failed prints from moisture, I'd spend ~$45–90 on a heated dryer that can feed filament directly to the printer rather than buying only a passive dry box. For Nylon/PA or other particularly hygroscopic materials, I'd prioritize a dryer capable of higher temperatures.

If you tell me what filament you print (PLA/PETG/TPU/ABS/Nylon) and how many spools you want to dry at once, I can narrow it down to 2–3 good choices.

Several major 3D printing brands and third-party accessory manufacturers sell dedicated filament dryers and dry boxes, ranging from single-spool desktop units to multi-roll active heated systems.[1]

Top Brands and Retailers for Filament Dryers & Dry Boxes

• Sunlu : Offers popular multi-spool and single-spool options like the [SUNLU FilaDryer S4 ](https://store.sunlu.com/products/sunlu-filadryer-s4?currency=USD&country=US&variant=49431700472090&utm_source=google&utm_medium=cpc&utm_campaign=Google%20Shopping&stkn=98fc28031836&srsltid=AfmBOor4aOjfHi_LS7uZFi9iIkabJzumGF_OSezN-sHx_f8An76h99wIYKk) (which holds up to four spools simultaneously) alongside their standard S1/S2 single-roll dryers.[1]
• Creality : Sells the Space Pi Filament Dryer and the Space Pi Plus (dual-spool) featuring 360-degree hot-air circulation and touch-control adjustable temperatures.
• Polymaker : Maker of the modular PolyDryer system, which features a single detachable heating dock and interchangeable sealed dry boxes (Polymer PolyDryer Info ), as well as passive storage like the PolyBox.
• Bambu Lab : Offers active drying integration and heated enclosure features natively with certain multi-material hardware upgrades or printer combos available directly on the Bambu Lab Store.
• PrintDry : Known for specialized heavy-duty filament dryers and vacuum-sealed storage containers paired with hand or electric pumps (PrintDry Vacuum Containers).
• EIBOS & Sovol : Provide affordable standalone dry boxes (such as Eibos Cyclopes or Sovol dryers) widely available on general marketplaces like Amazon or their respective official storefronts.

Would you prefer a dryer that handles a single spool , holds multiple spools at once , or allows you to print directly out of the dryer box?

Absolutely. If moisture is causing stringing, popping/crackling, poor layer adhesion, or inconsistent extrusion, an active filament dryer is usually worth it. SUNLU notes that a sealed desiccant box is mainly for storage, while a heated dryer is better for actually recovering wet filament.SUNLU

Here are some good current options:

• SUNLU S2 Filament Dryer - $44.99 (SUNLU)

• Polymaker PolyDryer - $71.99 (Best Buy)

• ELEGOO H1 HT Filament Dryer - $70.00 (ELEGOO US)

• EIBOS Series X Easdry - $54.99 (EIBOS3D)

• SUNLU S4 Pro Filament Dryer - $139.99 (SUNLU | Affordable 3D Printing Filaments and Resins) | --- | --- |

• PrintDry PRO3 - $268.00 (3D Printer | Raise3D)

• Budget / basic:

— around $45, one-spool capacity, up to 70°C. Good general-purpose choice.Sunlu

• Dry + store:

— combines an active drying dock with an airtight storage box; the box can continue protecting the filament after drying.Polymaker

• High-temperature:

— reaches 85°C, useful if you're regularly printing moisture-sensitive materials.

• Multiple spools:

— four-spool capacity and independent temperature/time control. SUNLU currently lists it at $139.99.SUNLU

• Engineering filaments: SUNLU's E2 goes to 110°C and supports drying/annealing, making it much better suited to materials such as PA/nylon and PC.Sunlu

Where to buy

store.sunlu.com — currently has several dryers from roughly $39–$250.SUNLU

shop.polymaker.com — sells the PolyDryer system and individual storage boxes.Polymaker

bhphotovideo.com — carries PolyDryer boxes and other 3D-printing accessories.

Best Buy also currently carries the Polymaker PolyDryer.

If you tell me which filament you print (PLA/PETG/TPU/ABS/nylon/etc.) and how many spools you want to dry at once, I can narrow this down to the best 2–3 dryers for your setup.

Filament dryers and dry boxes are sold directly by top 3D printing brands, specialty retail sites like MatterHackers and SainSmart , and large online marketplaces like Amazon.

Because your prints are actively failing, it is important to distinguish between active dryers (which use heat to force moisture out of wet plastic) and passive dry boxes (which use seals and desiccant to keep already-dry plastic from getting wet). To save your current spools, you need an active heated dryer first.youtube.com+2

Active Filament Dryers (Best for fixing wet filament)

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• Standout Feature : An affordable, popular entry-level heated chamber that dries a single spool while feeding directly to your printer.
• Controls : Simple digital interface to set customized heat and timers.3dwithus.com+1[2]

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• Standout Feature : Uses a 360° PTC hot-air heating system and built-in fan for highly uniform drying across the spool.
• Interface : Features a 3.7-inch touch screen with real-time temperature and humidity tracking.[1][2]

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• Standout Feature : Dual-spool capacity allows you to dry and print with two 1kg rolls simultaneously.
• Sealing : Features silicone gaskets so it serves as a tight storage vault when powered off.sovol3d.com+1[2]

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• Standout Feature : Heavy-duty workstation built to heat 4 spools simultaneously.
• Performance : Can hit an industry-leading 85°C, making it excellent for engineering plastics like Nylon and PC.[1]

Passive Dry Boxes (Best for long-term storage)

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• Standout Feature : Highly protective modular storage box equipped with color-changing desiccant and a built-in hygrometer.
• Ecosystem : Can be used standalone for storage or snapped onto the separately sold PolyDryer Dock for active heating.[1][2][3]

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• Standout Feature : Electronic cabinet utilizing thermoelectric condensation to actively pull moisture from the air without heat.
• Capacity : Commercial-grade footprint that stores up to 14 standard spools safely at 15% RH.[1]

To help narrow down your choice, let me know what specific materials you are printing with (like PLA, PETG, or Nylon) and how many spools you typically need to manage at once.sovol3d.com+2