Bitcoin Space Heater S9 Edition vs MicroBT Whatsminer M21
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Bitcoin Space Heater S9 Edition | Specification | MicroBT Whatsminer M21 |
|---|---|---|
| 12.0 TH/s | Hashrate | 31.0 TH/s |
| 1,100 W | Power Consumption | 1,860 W |
| 91.7 J/TH | Efficiency | 60.0 J/TH |
| 50 dB | Noise Level | — |
| 8.0 kg | Weight | 7,150.0 kg |
| 3,753 BTU/hr | BTU Output | 6,346 BTU/hr |
| 59/100 | Home Mining Score | 28/100 |
| — | Release Year | — |
| SHA-256 | Algorithm | SHA-256 |
| D-Central | Manufacturer | MicroBT |
Profitability Comparison
Bitcoin Space Heater S9 Edition
MicroBT Whatsminer M21
Based on BTC price of $68,886 and current network difficulty as of Mar 27, 2026. Actual results vary.
Verdict
Based on our multi-factor analysis, the MicroBT Whatsminer M21 wins on 2 of 5 factors (efficiency, hashrate). The Bitcoin Space Heater S9 Edition holds the edge in power consumption and home mining score and noise level. Review the detailed specs and profitability calculations above to determine which miner best fits your specific setup.
Best For...
Best for Profitability
TieBoth miners produce similar daily profit.
Best for Home Mining
Bitcoin Space Heater S9 EditionScore: 59/100. 50 dB noise level.
Best for Efficiency
MicroBT Whatsminer M2160.0 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Is the Bitcoin Space Heater S9 Edition or MicroBT Whatsminer M21 more profitable?
At the current BTC price and a $0.10/kWh electricity rate, the Bitcoin Space Heater S9 Edition is more profitable at $-2.28/day compared to $-3.54/day for the MicroBT Whatsminer M21. Profitability depends heavily on your electricity rate — use the selector above to calculate with your actual costs.
Which is quieter, the Bitcoin Space Heater S9 Edition or MicroBT Whatsminer M21?
The Bitcoin Space Heater S9 Edition is quieter at 50 dB compared to the MicroBT Whatsminer M21 at 0 dB. For home mining, lower noise levels make a significant difference in livability.
Which is better for home mining, the Bitcoin Space Heater S9 Edition or MicroBT Whatsminer M21?
The Bitcoin Space Heater S9 Edition scores 59/100 on our Home Mining Score (vs 28/100 for the MicroBT Whatsminer M21). This composite score factors in noise, power requirements, heat output, size, and setup ease — all critical for residential mining.
What is the efficiency difference between Bitcoin Space Heater S9 Edition and MicroBT Whatsminer M21?
The Bitcoin Space Heater S9 Edition runs at 91.7 J/TH while the MicroBT Whatsminer M21 runs at 60.0 J/TH — a difference of 31.7 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs.
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