Bitmain Antminer S11 (20.5Th)
Professional-Grade Miner
This miner draws 1,530W and produces 75+ dB of noise — it is designed for dedicated mining environments, not living spaces. Professional-grade miners deliver the highest hashrate and revenue per unit but require proper infrastructure: a 240V circuit, adequate ventilation or exhaust ducting, and a space where noise is not a concern (garage, basement, warehouse, or outdoor enclosure).
For home miners looking for a quieter alternative, consider our Bitcoin Space Heater builds or explore open-source miners like the Bitaxe that are purpose-built for residential environments.
Heater-Class Miner
At 1,530W, this miner outputs approximately 5220 BTU/hr of heat — equivalent to a standard electric space heater. Every watt consumed by an ASIC miner is converted to heat with 100% efficiency, making it a space heater that also mines Bitcoin.
During heating season, the electricity cost of running this miner replaces your heating bill — and you earn Bitcoin on top. In cold climates like Canada, this dual-purpose approach can dramatically improve mining economics. D-Central offers purpose-built Bitcoin Space Heater editions with noise reduction, duct adapters, and heater-mode firmware for seamless home integration.
Profitability Calculator
| Period | Revenue | Electricity Cost | Profit |
|---|---|---|---|
| Daily | $0.65 | $2.57 | $-1.93 |
| Weekly | $4.52 | $17.99 | $-13.48 |
| Monthly | $19.35 | $77.11 | $-57.76 |
| Yearly | $235.49 | $938.20 | $-702.71 |
Heating offset estimates the value of heat replacing an electric space heater during heating season (~6 months/year in Canada). Actual savings depend on your heating setup and climate.
Where to Buy the Bitmain Antminer S11 (20.5Th)
D-Central Technologies
CanadaBitcoin Mining Hackers since 2016. Ships from Laval, Quebec.
View ProductASIC Miner Market
United StatesWide selection of new and used ASIC miners. US-based shipping.
Shop NowFull Specifications
| Model | Bitmain Antminer S11 (20.5Th) |
| Model Number | Antminer S11 (20.5Th) |
| Manufacturer | Bitmain |
| Algorithm | SHA-256 |
| Coins Mined | Bitcoin (BTC) |
| Hashrate | 20.5 TH/s |
| Power Consumption | 1,530 W |
| Efficiency | 74.6 J/TH |
| Dimensions | 176 x 221 x 279mm |
| Weight | 6500 |
| BTU Output | 5220 BTU/hr |
| Equivalent Heater | Equal to a 1,530W space heater |
| Daily Power Cost | $2.57/day |
| Monthly Power Cost | $77.11/mo |
| Circuit Requirement | Dedicated 120V 20A |
| Release Date | 2018-11-01 |
| Status | Active |
Home Mining Assessment
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Frequently Asked Questions
Is the Bitmain Antminer S11 (20.5Th) profitable?
At $0.07/kWh, the Bitmain Antminer S11 (20.5Th) currently operates at a daily loss of $1.93. However, profitability can improve with lower electricity rates or rising BTC prices. If used as a space heater, the heating offset may make it economically viable.
Can I mine Bitcoin at home with the Bitmain Antminer S11 (20.5Th)?
The Bitmain Antminer S11 (20.5Th) has a home mining score of 28/100. With 0 dB noise and 1,530W power draw, it may require a dedicated space like a garage, basement, or outdoor enclosure. Consider noise insulation and proper ventilation.
Can the Bitmain Antminer S11 (20.5Th) heat my home?
The Bitmain Antminer S11 (20.5Th) outputs approximately 5220 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.
What power supply does the Bitmain Antminer S11 (20.5Th) need?
The Bitmain Antminer S11 (20.5Th) draws 1,530W of power. You need a power supply rated for at least 1,683W 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.