Bitmain Antminer S21 Immersion (227Th)
Immersion-Cooled Miner
This miner is designed to operate fully submerged in a dielectric (non-conductive) cooling fluid. Unlike hydro miners that circulate liquid through internal channels, immersion miners have their entire board and chips bathed in engineered coolant inside a specialized tank.
Immersion cooling is the most effective thermal management available for ASIC miners. It eliminates all fan noise (completely silent operation), removes dust and humidity as failure factors, enables maximum overclocking potential, and dramatically extends hardware lifespan by maintaining perfectly even chip temperatures.
The trade-off is infrastructure: immersion requires a tank, dielectric fluid (typically engineered hydrocarbon or synthetic), and a heat exchanger. It is the gold standard for professional mining farms and serious home miners who want maximum performance with zero noise.
Professional-Grade Miner
This miner draws 3,623W 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.
Profitability Calculator
| Period | Revenue | Electricity Cost | Profit |
|---|---|---|---|
| Daily | $6.82 | $6.09 | $0.74 |
| Weekly | $47.75 | $42.61 | $5.15 |
| Monthly | $204.66 | $182.60 | $22.06 |
| Yearly | $2,490.07 | $2,221.62 | $268.45 |
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 S21 Immersion (227Th)
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 S21 Immersion (227Th) |
| Model Number | Antminer S21 Immersion (227Th) |
| Manufacturer | Bitmain |
| Algorithm | SHA-256 |
| Coins Mined | Bitcoin (BTC) |
| Hashrate | 227 TH/s |
| Power Consumption | 3,623 W |
| Efficiency | 16 J/TH |
| Noise Level | 75 dB |
| Dimensions | 293 x 236 x 364mm |
| Weight | 17.15 |
| BTU Output | 12362 BTU/hr |
| Equivalent Heater | Equal to a 3,623W space heater |
| Daily Power Cost | $6.09/day |
| Monthly Power Cost | $182.60/mo |
| Circuit Requirement | 240V circuit required |
| Release Date | 2024-12-01 |
| MSRP | $3,269.00 |
| Status | Active |
Home Mining Assessment
The Bitmain Antminer S21 Immersion (227Th) is a SHA-256 cryptocurrency miner manufactured by Bitmain. It delivers a hashrate of 227 TH/s with a power consumption of 3623W, achieving an efficiency of 16 J/TH.
Operates at 75 dB noise level, weighs 17.15 kg, measures 293 x 236 x 364mm.
With a home mining score of 30/100, this miner is best suited for dedicated mining spaces for residential use. It produces 12362 BTU/h of heat output, making it effective for supplemental space heating.
View detailed specifications, real-time profitability calculations, and comparison data for the Bitmain Antminer S21 Immersion (227Th) in our comprehensive ASIC miner database.
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Compare the Bitmain Antminer S21 Immersion (227Th)
Frequently Asked Questions
Is the Bitmain Antminer S21 Immersion (227Th) profitable?
At $0.07/kWh electricity, the Bitmain Antminer S21 Immersion (227Th) generates approximately $0.74 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 Bitmain Antminer S21 Immersion (227Th)?
The Bitmain Antminer S21 Immersion (227Th) has a home mining score of 30/100. With 75 dB noise and 3,623W 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 S21 Immersion (227Th) heat my home?
The Bitmain Antminer S21 Immersion (227Th) outputs approximately 12362 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 S21 Immersion (227Th) need?
The Bitmain Antminer S21 Immersion (227Th) draws 3,623W of power. You need a power supply rated for at least 3,985W 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.