Description
This printed duct adapter is listed for dual 120mm fan mounting and a nominal 6-inch duct connection. Before ordering, confirm the exact mounting-hole spacing, spacing between fan centers, actual collar diameters and clearance for your miner and duct. A shared fan-size label alone does not establish fit across brands or models.
| Specification | Details |
|---|---|
| Input | Dual 120mm fan mounting (standard ASIC fan size) |
| Output | 6-inch round duct (standard HVAC) |
| Compatibility | Confirm the exact miner mounting pattern, fan spacing and clearance before ordering |
| Material | 3D printed (high-efficiency airflow design) |
| Duct Connection | Nominal 6-inch catalog label; confirm actual collar diameters and the duct connection method |
Key Features
- Compare the mounting pattern and fan spacing with your exact miner
- High-efficiency internal geometry minimises airflow restriction and back-pressure
- 6-inch duct output connects to standard HVAC ducting, dryer vent hose, or rigid pipe
- Enables serious noise reduction by directing exhaust through ducting
- Heat recovery ready — duct hot exhaust into rooms or outdoors as needed
Compatibility
Confirm the miner model, mounting-hole pattern, spacing between the two fan centers, collar inner and outer diameters, and nearby cable or housing clearance before ordering. Use photos with a ruler to check both the miner mounting face and the intended duct or fitting. A nominal 120mm fan size or 6-inch duct label is not a measured fit confirmation.
Will 6-inch ducting restrict airflow too much?
For miners with dual 120mm fans (like the S9 or L3+), a 6-inch duct provides adequate airflow. These older models push less air volume than newer S19/S21 machines. For higher-airflow models, consider an 8-inch shroud.
Can I use this on the intake side too?
Yes. You can install shrouds on both the intake and exhaust sides to create a fully ducted setup. This allows you to pull cool air from outside and exhaust hot air where you want it — the ideal home mining installation.
Do I need to remove the stock fans?
No. The shroud mounts over the existing 120mm fans using the standard fan screw holes. Your stock fans remain in place and blow through the shroud into the duct.
The next generation
This design helped shape the current D-Central Shroud System — a full open-source family of shrouds, silencers and duct fittings designed in-house in Montreal, with every file free to download at /3d-models/ and every part made to order. For this job, the current-generation part is the Antminer S19 / S21 dual-120 to 6-inch shroud.




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