Supplier listings may use S21 Pro or Pro+ naming. Confirm the original factory label and selected hashrate bin. This page uses the 234 TH\/s, 3510W reference configuration.<\/p>\n
Plan a reliable Antminer S21 Pro installation<\/h3>\n
The air-cooled layout requires a suitable electrical circuit and a clear intake-to-exhaust airflow path. At the reference power of 3,510W, plan both ventilation and heat removal for the full installed load. A compact enclosure does not establish suitability for a bedroom, shared office or living room; confirm the manufacturer noise specification and the actual installation environment.<\/p>\n
Antminer S21 Pro electricity planning<\/h3>\n
At a constant 3,510W for 24 hours, calculated energy use is 84.240 kWh per day. At USD 0.05\/kWh, that corresponds to approximately USD 4.21 per day for the miner alone. At USD 0.08\/kWh, that corresponds to approximately USD 6.74 per day for the miner alone. At USD 0.10\/kWh, that corresponds to approximately USD 8.42 per day for the miner alone. These are arithmetic planning examples, not measured consumption, mining revenue or a profit forecast. Operating mode, ambient conditions and supporting equipment can change actual site consumption.<\/p>\n
Frequently asked questions<\/h3>\nWhich network is this machine intended to mine?<\/h4>\n
The listed workload is SHA-256, with BTC as the reference network or coin selection. ASIC mining hardware is designed for its supported algorithm. It does not become a Bitcoin miner or a general-purpose AI computer simply by changing the pool address. For merged mining, check the pool’s current supported networks and payout rules.<\/p>\n
What must be checked before ordering the Antminer S21 Pro?<\/h4>\n
Confirm the exact model and hashrate bin, input voltage and phase, plug or PDU connection, operating mode, condition and included accessories. Ask for the specifications applicable to the quoted batch. New, used and modified equipment can carry different delivery and warranty terms.<\/p>\n
Does the listed hashrate guarantee daily income?<\/h4>\n
No. Mining output varies with pool performance, network difficulty, fees and uptime. Coin prices and electricity costs also change the operating result. Use current network data and your complete site costs when evaluating a deployment; a static product page cannot guarantee payback or daily profit.<\/p>\n
How do I request a quotation from PunkHash?<\/h4>\n
Send the model, requested hashrate, quantity and destination country. Include your supply voltage and cooling configuration for a farm project. PunkHash can then confirm the quoted hardware version, available condition, shipment plan, included components and applicable warranty before payment.<\/p>\n
Prepare the complete mining setup<\/h3>\n
Keep a record of the miner specification, power connections, cooling arrangement and maintenance requirements for each installation. For multiple machines, calculate the combined electrical load and heat rejection requirement rather than repeating a single-unit assumption across the site.<\/p>\n
![\"Antminer](\"https:\/\/www.punkhash.com\/wp-content\/uploads\/2026\/11\/punkhash-antminer-s21-pro-main.png\")