Bitmain launched two water-cooled devices on September 13, 2025: the Antminer L11 HU6 and Antminer L11 HU2. Both use hydro cooling but follow different approaches:
- HU6 — internal circulation (self-contained loop, no external cooling tower needed).
- HU2 — external circulation (requires external cooling tower/water source; built for professional sites).
Pre-order available via the link: https://nhash.net/search?q=L11+hyd&options%5Bprefix%5D=last
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Core Specifications Comparison
| Model | Hashrate | Power | Cooling | Noise | Ideal Scenario |
|---|---|---|---|---|---|
| Antminer L11 HU6 | 33G | 5676W | Internal circulation + fan assist | 58 dB | High-density farms, long-term ROI |
| Antminer L11 HU2 | 35G | 5775W | External circulation (requires an external water source) | Lower than air-cooled models | Large water-cooled farms, pro ops |
Key Differences (at a glance)
- Cooling design: HU6 uses a self-contained loop (no external water); HU2 uses external cooling towers for greater dissipation.
- Hashrate & efficiency: HU2 offers slightly higher hashrate (35G vs 33G) with comparable efficiency.
- Noise: HU2 typically achieves lower noise due to separated cooling systems.
Pros & Cons
Antminer L11 HU6 (Internal Circulation)
-
Pros:
- Simple deployment — no external water infrastructure required.
- High stability — precise temperature control; measured hashrate fluctuation ±1.5%.
- Strong brand support and after-sales service from Bitmain.
-
Cons:
- High power draw (5676W) — needs a professional electrical setup.
- High upfront cost; payback 16 months at $0.06/kWh.
Antminer L11 HU2 (External Circulation)
-
Pros:
- Superior heat dissipation for dense deployments.
- Higher hashrate (35G) — better long-term yield potential.
- Lower noise due to separated cooling.
-
Cons:
- Complex deployments require cooling towers, water treatment, and drainage.
- Higher O&M requirements and leakage risk.
- Best suited for large professional farms only.
Setup Tutorial (HU6 Example)
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Hardware preparation
- Miner unit, PSU (APW5 recommended for quieter operation), LAN cable, and power cables.
- Water radiator/pump (for household use, you may need to purchase a radiator; farms can tie into site water).
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Physical connections
- Internal loop: connect pump outlet → miner inlet; miner outlet → radiator return.
- External loop (HU2): Connect the fill pipe to the miner inlet and return/drain to the external cooling system.
- Connect PSU to hashboards and control board; plug LAN cable to router/switch.
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Software configuration
- Find miner IP using Advanced IP Scanner (scan local network).
- Default login:
admin / 123456789. - Open miner UI in browser → “Miner Configuration” → enter pool address (e.g., F2Pool), worker name, and password (leave blank if unused).
- Click Save & Apply and wait for reboot and pool connection.
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Monitoring & maintenance
- Green LED = normal; red LED = check settings/hardware.
- Monitor hashrate and payouts via pool dashboard or app.
- Maintain water lines and inspect monthly; clean fans and dust to preserve cooling efficiency.
Buying Advice
- High-end farms / long-term ROI: HU6 is recommended for its stable internal loop and easier deployment (payback 16 months at $0.06/kWh).
- Large water-cooled farms / pro teams: HU2 for higher hashrate and superior cooling — suitable where infrastructure and maintenance teams exist.
- Home / entry-level users: Consider air-cooled models (e.g., L11 Pro) to lower O&M complexity.
Conclusion
The Antminer L11 HU6 excels in stability and deployment convenience with its internal circulation design, making it a fit-for-purpose choice for many mining operations. The HU2 targets professional water-cooled environments, offering higher hashrate and cooling efficiency at the cost of more complex deployment and operation. New miners should evaluate hashrate, power draw, cooling needs, and operational costs before choosing. Bitmain’s brand and support add reliability to both models.
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