Antminer S19 / S21

Fan Shrouds for Antminer S19 and S21

Our fan shrouds connect your Antminer S19 or S21 to a ventilation hose or an external inline fan. Duct hot exhaust air outside, reuse the heat for warming a room, or make your miner whisper-quiet with external cooling. All shrouds are 3D-printed from durable PETG and fit all Bitmain ASICs with 2 x 120mm fans.

Which variant do you need?

Standard fan shrouds (with stock fans): The stock fans stay installed. You bolt the shroud over them and attach a 6-inch or 8-inch duct hose. Great for routing exhaust or supplying fresh air. Available as single shroud or intake + exhaust set.

Fan shrouds for external cooling (without stock fans): The loud stock fans are removed. A quiet inline fan is mounted directly into the shroud. This makes your miner significantly quieter – ideal for home mining in living spaces. Available in 8-inch and 10-inch.

Compatibility

All fan shrouds in this category fit the Antminer S19, S19j, S19j Pro, S19k Pro, S19 XP, S21, and T21 – all models with 2 x 120mm fans. For the Antminer S21+, S21 Pro, and S21 XP (2 x 140mm fans), see our Antminer S21+ / XP / PRO category.

Frequently Asked Questions

Does this shroud fit my Antminer S19 / S21?
Yes, all shrouds in this category fit the Antminer S19, S19j, S19j Pro, S19k Pro, S19 XP, S21, and T21 – all Bitmain models with 2 x 120mm fans.

What is the difference between 6-inch and 8-inch?
6-inch (150mm) is sufficient for short duct runs and moderate hashrates. 8-inch (200mm) offers more airflow – better for longer runs or full miner power.

Standard or external cooling – which should I choose?
Standard shrouds are the easiest starting point: fans stay in, attach a hose, done. External cooling is quieter but requires removing the stock fans, adding an inline fan, and using a fan spoofer.

Can I mount the shroud on the intake side?
Yes, the shrouds work on both the exhaust and intake side. For a complete setup, we recommend an intake + exhaust set.