Description
A 3D-printed airflow divider designed by D-Central for running an Antminer S19 or S21 with only two hashboards instead of three. When you remove a hashboard for repair or intentionally run a reduced configuration for quieter home mining, the empty slot creates an airflow short circuit — air bypasses the remaining boards instead of cooling them. This divider blocks the empty slot and redirects all airflow through the active hashboards, maintaining proper cooling and stable operation.
| Specification | Details |
|---|---|
| Compatibility | Antminer S19, S19 Pro, S19J, S19J Pro, S21 series |
| Material | 3D printed (heat-resistant) |
| Function | Blocks empty hashboard slot, redirects airflow |
| Design | D-Central original |
| Use Case | 2-hashboard operation, silent mining, repair standby |
Key Features
- Enables reliable 2-hashboard operation on 3-slot Antminers
- Prevents airflow bypass that causes overheating when a hashboard slot is empty
- Ideal for home miners running reduced power for lower noise and heat output
- Simple installation — slides into the empty hashboard slot
- D-Central original design — engineered specifically for S19/S21 chassis dimensions
Compatibility
Fits Antminer S19, S19 Pro, S19J, S19J Pro, and S21 series miners. Designed for the standard 3-hashboard chassis. If you are running any of these miners with fewer than three hashboards, this divider is essential for proper thermal management.
Why can’t I just run 2 hashboards without a divider?
Without a divider, the empty hashboard slot becomes a path of least resistance for the fans. Air rushes through the empty slot instead of cooling your active hashboards. This causes the remaining boards to overheat, throttle, and potentially trigger thermal shutdowns — even though you are running at lower total power.
Is running 2 hashboards a good home mining strategy?
Yes. Running 2 of 3 hashboards reduces power consumption and heat output by roughly a third, making an S19 more manageable for home use. Combined with ducting and fan speed control, it is one of the most effective ways to integrate a full-size ASIC into a residential environment.
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