Bitcoin accepted at checkout | Ships from Montreal, QC, Canada | Expert support since 2016
$35.99 CAD
Two 120 mm fans merged into one 6-inch duct. This is the single most-asked-for shroud in the modern Antminer world, because the S19 and standard S21 both put a pair of 120 mm fans on the exhaust end and neither of them gives you anywhere to attach a duct.
High Demand — Pre-order Now, Ships in 5-10 Business Days
Purchase details
Save 3% when you pay in Bitcoin.
Use the S21 cluster to connect current-generation specs, buying options, chip-level parts, troubleshooting, and repair support.
Two 120 mm fans merged into one 6-inch duct. This is the single most-asked-for shroud in the modern Antminer world, because the S19 and standard S21 both put a pair of 120 mm fans on the exhaust end and neither of them gives you anywhere to attach a duct.
Designed around the rear 120 mm fan pair on the Antminer S19 series and the standard Antminer S21. It is not intended for the S21 Pro or the S21 XP, which use a different fan arrangement — for the Pro, see the S21 Pro dual 140 mm shroud.
Measure before you order. Fit dimensions in this line are derived from published fan and chassis geometry and are not yet validated against measured production hardware. Check your flange size and the clearance around your machine against the footprint in the specifications below. If something does not fit, tell us — that is how the next revision gets better.
Fit over the exhaust fan pair, clamp a 6-inch duct to the single collar, and route it out. Because both fans feed one plenum before the collar, the two air streams merge inside the shroud instead of fighting each other in the duct.
Two fans blowing into one duct is a genuinely awkward fluid problem, and the usual DIY answer — a flat plate with a hole in it — makes it worse by forcing both columns to collide at a hard step. This body gives them a shaped plenum to merge in before the transition, which is the whole reason it is worth printing a proper shroud instead of taping on a box.
| Fits | Antminer S19 series and standard Antminer S21 — rear 120 mm fan pair |
|---|---|
| Intake | 2 × 120 mm fans |
| Outlet | 6″ duct collar |
| Footprint | 250 × 157 × 165 mm |
| Material | PETG |
| Construction | Single continuous body — no assembly, no fasteners, no glued joints |
| Design files | Open source — free to download, use, modify and redistribute |
| SKU | DC-SHR-D120-6 |
Every shroud D-Central designs is released as an open file. The geometry for this part is free to download from our 3D models download center: use it, modify it, remix it, run it in your own shop, sell what you make from it. There is no licence to buy and no design gated behind a purchase. Shared knowledge is the whole reason this industry has open hardware at all, and we are not going to be the ones who stop passing it on.
This listing is for the finished part: made to order in PETG and shipped from Montreal, Quebec. If you would rather have it in your hands than spend an evening making one, buy it here — that is what pays for the next design in the line. You can also support the open-source work directly through D-Central’s fund page.
See the full D-Central shroud and ducting system for the compatibility matrix and sizing guide.
No. This is for the S19 series and the standard S21. The S21 Pro uses a 140 mm fan pair and needs the S21 Pro shroud. The XP is a different arrangement again and is not covered by this part.
The airflow body is the same idea; what changes is how the shroud attaches and how the collar terminates. We ship five mount variants — venturi, offset, clamp-groove, bayonet and threaded — because installs differ. This is the plain, straightforward one.
Two 120 mm fans at full tilt can justify 8-inch, particularly on a long or bendy run. 6-inch is fine for short, direct routing. If you are undecided, 8-inch never hurts airflow — it only costs you space.
Ducting alone redirects noise rather than removing it. The expansion-chamber silencer in this size adds a tuned chamber between the fans and the duct. We publish no decibel figures because we have not measured them — the geometry is honest, the marketing is not going to be.
| Weight | 250 g |
|---|---|
| Dimensions | 25 × 15.7 × 16.5 cm |
Only logged in customers who have purchased this product may leave a review.
When Bitmain announced the Antminer S21, the Bitcoin mining world took notice. After years of incremental improvements across the S19 lineup, the S21 represents a genuine generational leap…
In the rapidly evolving world of cryptocurrency, Bitcoin mining has emerged as a cornerstone activity for enthusiasts and investors alike.
Industrial mining hardware was never built for your house. 3D printing closes the gap — shrouds, enclosures, stands, and repairs. Here is what to print, what to buy, and where the limits are.
We use cookies to improve your experience and analyze site traffic. Privacy Policy
Choose which cookies you allow. Essential cookies are required for the site to function and cannot be disabled.
Required for basic site functionality, shopping cart, and security. Always active.
Help us understand how visitors use our site so we can improve your experience. Includes Google Analytics.
Used to deliver relevant ads and track campaign performance across platforms.
Reviews
There are no reviews yet.