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1325 Rue Bergar, Laval, QC [email protected] 1-855-753-9997 Mon-Fri: 8:30 - 18:00
Active Bitmain SHA-256 Featured

Antminer S21

Too loud and power-hungry for home use without modifications

Hashrate 200 TH/s
Power 3,500 W
Efficiency 17.5 J/TH
Noise 75 dB
We Repair This Miner

Profitability Calculator

$71,706
Period Revenue Electricity Cost Profit
Daily $6.22 $5.88 $0.34
Monthly $186.47 $176.40 $10.07
Yearly $2,268.76 $2,146.20 $122.56

We Repair This Miner

D-Central has repaired 2,500+ miners since 2016. Hashboard repair, control board diagnostics, fan replacement, and full refurbishment.

Get a Repair Quote

Full Specifications

Model Antminer S21
Model Number S21
Manufacturer Bitmain
Algorithm SHA-256
Coins Mined Bitcoin (BTC)
Hashrate 200 TH/s
Power Consumption 3,500 W
Efficiency 17.5 J/TH
Noise Level 75 dB
Chip Model BM1368
Chip Count 132
Cooling Air
Voltage Range 200-240V AC
Operating Temperature 5-40°C
Dimensions 400x195x290
Weight 14.6
Interface Ethernet
BTU Output 11942 BTU/hr
Release Date 2023-09-01
MSRP $5,500.00
Status Active

Home Mining Assessment

44 /100
Fair
Noise 75 dB
Loud - garage or basement recommended
Heat Output 3,500W / 11942 BTU
High heat - requires ventilation or duct system
Power Draw 3,500W (3.5kW)
240V dedicated circuit required

Too loud and power-hungry for home use without modifications

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Frequently Asked Questions

Is the Antminer S21 profitable?

At $0.07/kWh electricity, the Antminer S21 generates approximately $0.34 in daily profit. Profitability depends on your electricity rate and Bitcoin network conditions. Use the calculator above with your actual electricity rate for personalized results.

Can I mine Bitcoin at home with the Antminer S21?

The Antminer S21 has a home mining score of 44/100. With 75 dB noise and 3,500W power draw, it may require a dedicated space like a garage, basement, or outdoor enclosure. Consider noise insulation and proper ventilation.

Can the Antminer S21 heat my home?

The Antminer S21 outputs approximately 11942 BTU/hr of heat. For reference, a typical space heater produces 5,000-5,500 BTU/hr. All electrical energy consumed by the miner is converted to heat, making it 100% efficient as a heater. D-Central offers Bitcoin Space Heater builds designed specifically for home heating integration.

Does D-Central repair the Antminer S21?

Yes, D-Central provides professional repair services for the Antminer S21. Our technicians have repaired 2,500+ miners since 2016. Services include hashboard repair, control board diagnostics, fan replacement, and full refurbishment. Ship your miner to our Laval, Quebec facility for diagnosis and repair.

What power supply does the Antminer S21 need?

The Antminer S21 draws 3,500W of power. You need a power supply rated for at least 3,850W with appropriate voltage (200-240V AC). D-Central stocks compatible power supplies in our shop. Always use a quality PSU from a reputable manufacturer to protect your investment.