Bitcoin accepted at checkout | Ships from Montreal, QC, Canada | Expert support since 2016
$21.99 CAD
The workhorse of the line. One 120 mm fan face in, one 6-inch duct collar out, printed as a single continuous body — no seams to leak air, no parts to glue, nothing to come apart when the machine heats up and cools down a few thousand times. If you have a single-fan machine and you want its heat …
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The workhorse of the line. One 120 mm fan face in, one 6-inch duct collar out, printed as a single continuous body — no seams to leak air, no parts to glue, nothing to come apart when the machine heats up and cools down a few thousand times. If you have a single-fan machine and you want its heat somewhere other than the room you are standing in, this is the part that connects the two.
The intake face matches the standard 120 × 120 mm fan flange, which is close to universal on Antminer S9-class hardware, single-fan ASIC builds, most PSU exhaust fans and a great many enclosure fans. The output collar is sized for common 6-inch flexible or rigid duct — the same size AC Infinity Cloudline S6/T6 inline fans and most grow-room ducting use.
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.
Seat it over the exhaust side of the fan, band-clamp your 6-inch duct onto the collar, and route the duct wherever the heat needs to go: a window port, a chimney run, a heat-recovery loop into a garage or workshop, or simply the far side of a wall. The shroud handles the shape change from square fan to round duct; the duct handles the distance.
A bare fan blowing into open air dumps heat into the room in every direction at once and radiates fan noise the same way. Capturing that column into a duct converts an uncontrolled heat source into a single, steerable exhaust path — which is the difference between a machine you tolerate in a basement and one you can actually place deliberately.
| Fits | Any standard 120 × 120 mm fan flange (Antminer S9-class and most single-fan builds) |
|---|---|
| Intake | 1 × 120 mm fan |
| Outlet | 6″ duct collar |
| Footprint | 157 × 157 × 95 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-120-6 |
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.
The Antminer S9 family is the classic case, along with many single-fan lab and bench setups, PSU exhaust fans and DIY enclosure builds. If your fan measures 120 mm across its mounting flange, this is your part. We also sell an S9-specific version with a deeper capture body.
It is built to the standard 120 mm fan flange dimensions, so it fits the overwhelming majority of 120 mm fans. Fan shrouds are not yet hardware-validated against every chassis in the field, so measure your flange and your available clearance before ordering. If something does not fit, tell us — that feedback goes straight into the next revision, and the file is open so you can adjust it yourself in the meantime.
6-inch is the right default for a single 120 mm fan; the fan simply cannot move enough air to need more cross-section. Step up to 8-inch when you are running two fans into one duct, when the duct run is long or has several bends, or when you are feeding an 8-inch inline booster fan. We also sell an 8″ to 6″ reducer if you need to mix sizes.
| Weight | 150 g |
|---|---|
| Dimensions | 15.7 × 15.7 × 9.5 cm |
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Last reviewed July 31, 2026.
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