Bitmain Antminer S9 (12.5Th)
Heater-Class Miner
At 1,225W, this miner outputs approximately 4180 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 | $0.40 | $2.06 | $-1.66 |
| Weekly | $2.80 | $14.41 | $-11.61 |
| Monthly | $11.99 | $61.74 | $-49.75 |
| Yearly | $145.92 | $751.17 | $-605.25 |
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 S9 (12.5Th)
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 S9 (12.5Th) |
| Model Number | Antminer S9 (12.5Th) |
| Manufacturer | Bitmain |
| Algorithm | SHA-256 |
| Coins Mined | Bitcoin (BTC) |
| Hashrate | 12.5 TH/s |
| Power Consumption | 1,225 W |
| Efficiency | 98 J/TH |
| Dimensions | 135 x 158 x 350mm |
| Weight | 4200 |
| BTU Output | 4180 BTU/hr |
| Equivalent Heater | Half a standard space heater (4,180 BTU/hr) |
| Daily Power Cost | $2.06/day |
| Monthly Power Cost | $61.74/mo |
| Circuit Requirement | Standard 120V 15A |
| Release Date | 2017-02-01 |
| MSRP | $65.00 |
| Status | Active |
Home Mining Assessment
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Frequently Asked Questions
Is the Bitmain Antminer S9 (12.5Th) profitable?
At $0.07/kWh, the Bitmain Antminer S9 (12.5Th) currently operates at a daily loss of $1.66. 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 S9 (12.5Th)?
The Bitmain Antminer S9 (12.5Th) has a home mining score of 31/100. With 0 dB noise and 1,225W 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 S9 (12.5Th) heat my home?
The Bitmain Antminer S9 (12.5Th) outputs approximately 4180 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 S9 (12.5Th) need?
The Bitmain Antminer S9 (12.5Th) draws 1,225W of power. You need a power supply rated for at least 1,348W 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.