$41.99 CAD
Antminer S19 / S21 dual 120 mm shroud with a full 8-inch outlet, for duct runs that climb, turn or feed an inline fan. Both fans merge in one plenum before the collar. One-piece PETG, made to order in Montreal, Quebec.
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An Antminer S19 shroud with an 8-inch outlet is what you reach for when the duct has real work to do. This is the dual 120 mm body with the collar opened to a full 8 inches, sized for runs that climb into an attic, turn twice on the way to a window, or hand off to an 8-inch inline fan halfway along.
Cross-section is the cheapest thing you can give a fan. An 8-inch duct carries close to twice the area of a 6-inch one, and every metre of run, every elbow and every flex-duct wrinkle spends part of that budget. Sizing up at the shroud spends the restriction on the route you need, not on a transition an inch from the fans.
The intake is the rear 120 mm fan pair on the Antminer S19, S19 Pro, S19j, S19j Pro, S19k Pro and S19 XP, and on the standard S21. Fan screws stay stock and stay reachable. The outlet takes 8-inch flexible or rigid duct and mates with 8-inch inline fans, the AC Infinity Cloudline S8 and T8 class included.
It is not the part for the S21 Pro or S21 XP, which run a 140 mm fan pair: those take the Antminer S21 Pro Dual 140 mm to 8" Duct Shroud. For metric ducting the same intake is offered as a Dual 120 mm to 200 mm Metric Duct Shroud, and the Antminer S19 / S21 Dual 120 mm to 8-Inch Shroud — Wide Base carries the same outlet on a different base. The body stands 250 x 203.2 x 170 mm behind the fan face, wider than the 6-inch shroud because the collar is bigger.
Seat it over the exhaust fan pair, clamp 8-inch duct to the collar, and run the line. It earns its size on long horizontal runs, on runs with two or more elbows, on vertical runs into a ceiling, and wherever an inline booster shares the load. Keep flexible duct pulled taut: a sagging flex line is a series of elbows you did not intend to install.
Two 120 mm fans pushing into a 6-inch duct with three bends in it is how people end up disappointed with ducting: the machine gets louder, the exhaust gets hotter, and the fans ramp to compensate. Backpressure does not announce itself, it quietly eats the airflow you are paying for. Widening the collar attacks that where it starts. Both fan columns still merge in a shaped plenum first, so they leave as one stream, through the largest opening the machine face can carry.
| Fits | Antminer S19 series and standard Antminer S21 — rear 120 mm fan pair. Not the S21 Pro, S21+ or S21 XP (140 mm pair), and not the S21 Hydro. |
|---|---|
| Intake | 2 × 120 mm fans |
| Outlet | 8″ duct collar, flexible or rigid duct |
| Footprint | 250 × 203.2 × 170 mm |
| Material | PETG |
| Colour | Black or orange PETG |
| Construction | Single continuous body — no assembly, no fasteners, no glued joints |
| Design files | Open source, CC BY-SA 4.0 — free to download, modify and redistribute |
| Download | STL, licence and installation guide (ZIP) — listed on the model card |
| SKU | DC-SHR-D120-8 |
This shroud is D-Central’s own design and, like every part in the line, it is published rather than protected: open source under CC BY-SA 4.0 at the 3D models download center, free to download, change the collar, scale the plenum, or run commercially.
The 8-inch body is D-Central Technologies’ own drawing, published the day it shipped instead of held back as a trade secret. Its card in the download centre links the ZIP: STL, CC BY-SA 4.0 licence, and the installation and safety guide in one file.
What this page sells is the finished 8-inch shroud, made to order in black or orange PETG and shipped from Montreal, Quebec. Whoever wants to print it can; whoever wants to duct a machine this weekend does not have to. The download never costs anything — the printed part and D-Central’s fund page are what keep the designs coming.
Plan the whole run with the D-Central shroud and ducting system.
If the duct leaves straight out of a wall two metres away, no: the 6-inch shroud is the tidier part. Choose 8 inches when the line climbs, turns more than once, runs a long way, or shares a trunk. The penalty for oversizing is the space it takes; the penalty for undersizing is permanent.
Yes. The collar is sized for standard 8-inch duct, which is what inline boosters in the AC Infinity Cloudline S8 and T8 class terminate in. Clamp the fan straight to the shroud, or join it with the 8" Duct Coupler for a joint you can break without touching the miner.
You can, but plan for it: whichever machine has the weaker fans gets backpressured by the stronger one, and the pair will not share evenly. The 8" to dual 6" Y-splitter runs in reverse as a collector if you want to try. One duct per machine still behaves most predictably.
It measures 250 x 203.2 x 170 mm behind the fan face against the 6-inch body’s 250 x 165 x 152.4 mm, which matters on a shelf where machines sit shoulder to shoulder. If width is the constraint but the run still needs airflow, an offset 6-inch collar is often the better geometry.
Yes, and later is the right place for it. An 8" to 6" duct reducer costs far less pressure downstream, after the air has organised itself, than a narrow collar bolted straight to two fans. Run 8-inch off the machine and reduce at the wall.
No. The S21 Pro, S21 XP and S21+ use a 140 mm fan pair on a wider exhaust face, so a 120 mm shroud will not land on the screw pattern. Those take the S21 Pro dual 140 mm to 8" shroud. The standard S21 does use 120 mm fans, and this part is right for it.
| Weight | 399 g |
|---|---|
| Dimensions | 25 × 20.32 × 17 cm |
| Colour | Black, Orange |
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