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pennysave 20K Views
Feb 25, 2026 12:18 PM

4-Spool Sunlu Official S4 3D Printer Filament Dryer

$96

$117

17% off
+ Free Shippingat Amazon
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Deal Details
SUNLU Industry via Amazon has 4-Spool Sunlu Official S4 3D Printer Filament Dryer on sale for $96.20. Shipping is free.

Thanks to Community Member pennysave for sharing this deal.

About this product:
  • 4 Spool Capacity: SUNLU 3D printer filament dryer S4 can dry up to four 1kg 3D printer filaments
  • Is notably large in size. External size - 460 (L) x 220 (W) x 310 (H)mm, internal size - 450 (L) x 175 (W) x 207 (H)mm, net weight - 4KG
  • Features eight filament outlets, ideal for multiple printers and various filament loading angles, smoother loading and printing
  • Equipped with a 350W PTC heater
  • Three high-quality fans circulate air inside, ensuring consistent temperature across the entire area for more even drying, 360° surround heating
  • Supports a wide range of materials including PLA, PLA Plus, PLA Meta, PETG, ABS, TPU, PA, PC, Nylon, etc., compatible with 1.75mm, 2.85mm, and 3.00mm

Editor's Notes

Written by powerfuldoppler | Staff
  • About this Store:
  • Additional Information:
    • This offer is $1.79 less than the previous Frontpage Deal.
    • Please see the original post for additional details and/or view the Wiki and forum comments for further helpful discussion if available.

Original Post

Written by pennysave
Community Notes
About the Poster
Deal Details
Community Notes
About the Poster
SUNLU Industry via Amazon has 4-Spool Sunlu Official S4 3D Printer Filament Dryer on sale for $96.20. Shipping is free.

Thanks to Community Member pennysave for sharing this deal.

About this product:
  • 4 Spool Capacity: SUNLU 3D printer filament dryer S4 can dry up to four 1kg 3D printer filaments
  • Is notably large in size. External size - 460 (L) x 220 (W) x 310 (H)mm, internal size - 450 (L) x 175 (W) x 207 (H)mm, net weight - 4KG
  • Features eight filament outlets, ideal for multiple printers and various filament loading angles, smoother loading and printing
  • Equipped with a 350W PTC heater
  • Three high-quality fans circulate air inside, ensuring consistent temperature across the entire area for more even drying, 360° surround heating
  • Supports a wide range of materials including PLA, PLA Plus, PLA Meta, PETG, ABS, TPU, PA, PC, Nylon, etc., compatible with 1.75mm, 2.85mm, and 3.00mm

Editor's Notes

Written by powerfuldoppler | Staff
  • About this Store:
  • Additional Information:
    • This offer is $1.79 less than the previous Frontpage Deal.
    • Please see the original post for additional details and/or view the Wiki and forum comments for further helpful discussion if available.

Original Post

Written by pennysave

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Top Comments

TangyT
3Comments
14Reputation
Mine is working great, you can always buy a new one and return the broken one..
Go to Comment
ducksoup18
1.5KComments
393Reputation
I have one of these and didnt use it for a while (while organizing my "nerd nook") and now the thing wont even turn on. Tried different cables, reached out to sunlu, no response. I had heard they were solid but my experience is subpar.
Go to Comment

Community Reviews

The Sunlu S4 is a four spool filament dryer that helps pull moisture out of PLA, PETG, and other filaments so prints come out cleaner. It has been described as quiet, and drying old spools has reduced their weight by a few grams while improving print quality. The main caveats are that one unit stopped powering on after sitting unused, the release knob feels short, and the listing may need a quick authenticity check. It is a practical drying station if you want to keep multiple rolls ready.

Common Questions (4)

  • It is reported to be fairly quiet, around 45 dB at about 18 inches in one measurement, versus about 49 dB for a Creality dryer. That puts it a bit quieter in practice, and it is also described as quieter than the Creality unit by ear.

    oopszgabe23111

  • Yes. Drying old PLA and PETG reportedly reduced spool weight by a few grams from absorbed moisture, and the resulting prints came out excellent. It is especially useful for moisture-prone filaments like PETG, which can develop pops and zits when wet.

    BilboSwaggins36gobblygook

  • That should be verified before buying, because the listing may not be the legit Sunlu page. A separate Amazon listing for the same product was pointed out as a possible alternative to confirm authenticity.

    BluedemondeGolgothan

  • No. If PLA and PETG are in the same AMS, the dryer should be set to PLA temperatures so the PLA is not damaged by excessive heat.

    gabe23111

AI-generated summary based on comments from the community. Updated ago

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19 Comments

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Pro
Feb 25, 2026 1:49 PM
1.5K Comments
Joined Oct 2009
ducksoup18
Pro
Feb 25, 2026 1:49 PM
1.5K Comments

Our community has rated this post as helpful. If you agree, why not thank

I have one of these and didnt use it for a while (while organizing my "nerd nook") and now the thing wont even turn on. Tried different cables, reached out to sunlu, no response. I had heard they were solid but my experience is subpar.
3
Feb 25, 2026 2:22 PM
3 Comments
Joined Nov 2017
TangyTFeb 25, 2026 2:22 PM
3 Comments

Our community has rated this post as helpful. If you agree, why not thank

Quote from ducksoup18 View quoted comment :
I have one of these and didnt use it for a while (while organizing my "nerd nook") and now the thing wont even turn on. Tried different cables, reached out to sunlu, no response. I had heard they were solid but my experience is subpar.
Mine is working great, you can always buy a new one and return the broken one..
4
1
1
Feb 25, 2026 3:39 PM
167 Comments
Joined Feb 2013
PaxtoniaJohnFeb 25, 2026 3:39 PM
167 Comments
The only thing I know about 3d printing is get from the 5th grader after school (loves it). Is this something they could use? (Is this for only certain types of spools ? Using it or not using - in an elementary school setting does it matter ... vs more serious parts making)?
Feb 25, 2026 3:47 PM
2.8K Comments
Joined Jan 2007
gobblygookFeb 25, 2026 3:47 PM
2.8K Comments
Quote from PaxtoniaJohn View quoted comment :
The only thing I know about 3d printing is get from the 5th grader after school (loves it). Is this something they could use? (Is this for only certain types of spools ? Using it or not using - in an elementary school setting does it matter ... vs more serious parts making)?
The purpose of a filament dryer is to dry filament. Certain filaments attract moisture and when going through the extrusion process, the moisture is heated and turned to gas and "pops" the surface of the filament as it escapes. This leads to ugly "zits" on prints. PETG is notorious for this. PLA doesn't attract moisture as much.

If you keep your filament in sealed bags with desiccant, you most likely won't need this. If you live in a high humidity area, you will need one eventually.
1
2
Pro
Feb 25, 2026 3:59 PM
432 Comments
Joined Oct 2021
LivelyWallaby1957
Pro
Feb 25, 2026 3:59 PM
432 Comments
I'd get the SH03 for $88 from aliexpress over this. It can do 85 degrees for things like nylon PA6 etc, has independent heated sections and auto drying
2
1
Feb 25, 2026 6:31 PM
142 Comments
Joined May 2011
gregcainFeb 25, 2026 6:31 PM
142 Comments
Anyone have a gauge of how loud this one is? I just got a creality single dryer, and it is too loud for my house.
Feb 25, 2026 8:46 PM
3 Comments
Joined Mar 2017
BilboSwaggins36Feb 25, 2026 8:46 PM
3 Comments
I have one of these bad boys and it works phenomenal. I did some testing with old PLA and PETG that was left out when I first got it. I weighed my filament spools before and after drying. It works, brought the spools down a few grams from water weight and they print excellent. I advise any 3d printer to get a dryer, and this 4 spool one has been one of my favorite tools since I started 3.5 years ago.
I also modified mine slightly as the release knob is really short and I have it high up. I printed a small set of easy release knobs for dryer and they work great. Give it a shot!
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Feb 25, 2026 9:53 PM
1.6K Comments
Joined Jun 2007
oopszFeb 25, 2026 9:53 PM
1.6K Comments
Quote from gregcain View quoted comment :
Anyone have a gauge of how loud this one is? I just got a creality single dryer, and it is too loud for my house.
https://www.mytechfun.com/filament-dryers says 45 db at ~18 inches, compared to 49 for a creality. 10 db is half the volume, so about 65% quieter I think?
1
Pro
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This user is an Expert in Home & Home Improvement
Feb 25, 2026 10:40 PM
17.8K Comments
Joined Jul 2008
gabe23111Feb 25, 2026 10:40 PM
Pro
Expert
This user is an Expert in Home & Home Improvement
17.8K Comments
Quote from gregcain View quoted comment :
Anyone have a gauge of how loud this one is? I just got a reality single dryer, and it is too loud for my house.
I have a few dryers and this is pretty quiet. Nothing scientific, but just to my ears. I have two of them, but haven't used them much recently as it's pretty dry by me in the winter and when opening PETG from the package I usually dry it in one of my other dryers prior to putting it in my AMS.


Just keep in mind, if you have both PLA and PETG within the same AMS, you should set your dryer on PLA temps or you can ruin your PLA if temps are too high.

EDIT: I'm a moron. I thought this deal was for the AMS Heater. I do own the S4 as well and It does seem quieter than the Creality
Last edited by gabe23111 February 25, 2026 at 03:30 PM.
Pro
Feb 25, 2026 11:06 PM
1.5K Comments
Joined Oct 2009
ducksoup18
Pro
Feb 25, 2026 11:06 PM
1.5K Comments
Quote from TangyT View quoted comment :
Mine is working great, you can always buy a new one and return the broken one..
Sinful. I like it.
1
Feb 25, 2026 11:43 PM
9 Comments
Joined Dec 2019
BluedemondeFeb 25, 2026 11:43 PM
9 Comments
Is this even the legit Sunlu page? There is another on amazon https://www.amazon.com/dp/B0FVLK8TZW

Even if a few dollars off, might be worth confirming that it is a good deal.
Last edited by missiethegal February 25, 2026 at 03:49 PM.
Feb 26, 2026 1:17 AM
708 Comments
Joined Nov 2013
apostlej2015Feb 26, 2026 1:17 AM
708 Comments
Quote from LivelyWallaby1957 View quoted comment :
I'd get the SH03 for $88 from aliexpress over this. It can do 85 degrees for things like nylon PA6 etc, has independent heated sections and auto drying
Not seeing it under $117. You got a link big dawg?
Pro
Feb 26, 2026 4:15 AM
432 Comments
Joined Oct 2021
LivelyWallaby1957
Pro
Feb 26, 2026 4:15 AM
432 Comments
Quote from apostlej2015 View quoted comment :
Not seeing it under $117. You got a link big dawg?
Sovol SH03 4-Roll Filament Dryer w/ Dual Independent Heating Chambers - 2026-02-01

That was the slickdeals header - for some reason the link failed.
2
Feb 26, 2026 5:26 AM
752 Comments
Joined Jan 2019
TravisB7539Feb 26, 2026 5:26 AM
752 Comments
Quote from LivelyWallaby1957 View quoted comment :
I'd get the SH03 for $88 from aliexpress over this. It can do 85 degrees for things like nylon PA6 etc, has independent heated sections and auto drying
If only that price was currently available.
1

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Feb 26, 2026 2:05 PM
458 Comments
Joined Apr 2004
DeadlightFeb 26, 2026 2:05 PM
458 Comments
I saw that they had the "newer version of this item" was the one that goes on top of the AMS for Bambu printers for like $12 more so I picked that up instead. should take up less space overall for me https://www.amazon.com/SUNLU-AMS-...B0FLP97HMW

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