Antminer S21 Plus – 235 TH/s Air‑Cooled Bitcoin Miner

Antminer S21 Plus provides 216–235 TH/s hashrate with air‑cooling technology, combining efficiency, scalability, and warranty coverage.

Antminer S21 Plus Overview

The Antminer S21 Plus is Bitmain’s enhanced air‑cooled Bitcoin miner, designed to outperform the base S21 model. Unlike the standard 200 TH/s version, the Plus edition delivers up to 235 TH/s with improved efficiency. Consequently, miners achieve stronger performance while reducing energy costs. Moreover, its ~16.5 J/TH efficiency makes it a competitive choice for SHA‑256 mining.

Key Specifications

• Hashrate: 216–235 TH/s (±3%)
• Power Consumption: 3564–3877 W (±5%)
• Power Efficiency: ~16.5 J/TH
• Algorithm/Coins: SHA‑256 | BTC, BCH, BSV
• Cooling: Air‑cooled fans
• Noise Level: ~75 dB
• Networking: RJ45 Ethernet 10/100M
• Dimensions: 400 × 195 × 290 mm
• Weight: ~15–17 kg
• Voltage: 220–277 V AC
• Operating Temperature: 0–45 °C

🛒 Purchasing Guidelines

The S21 Plus typically costs $2,300–$2,500 per unit, depending on batch and reseller. In addition, Bitmain accepts payments in USD, BTC, ETC, USDC, and USDT. Orders ship on a SPOT basis within 10–30 working days, ensuring timely deployment. However, buyers must prepare customs documentation because Bitmain does not allow cancellations or refunds after submission.

🚚 Shipping Details

Bitmain dispatches the units on a first‑paid, first‑shipped basis, rewarding early payment with priority delivery. Furthermore, customers handle customs clearance, while Bitmain provides Certificates of Conformity for compliance.

🛡 Warranty

Each S21 Plus carries a 365‑day warranty. Bitmain covers replacement shipping costs during this period. Nevertheless, improper installation, unauthorized modifications, or resale void the warranty.

⚠️ Buyer Considerations

• Air‑cooled design suits mid‑scale farms or mixed setups.
• Profitability depends not only on Bitcoin’s price but also on network difficulty and electricity rates.
• Noise levels (~75 dB) require proper ventilation and sound management.
• Efficiency gains over the base S21 make it more attractive for miners with moderate electricity costs.