Bitcoin Space Heater S19 Edition vs Bitmain T21 (190TH)
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Bitcoin Space Heater S19 Edition | Specification | Bitmain T21 (190TH) |
|---|---|---|
| 80.0 TH/s | Hashrate | 190.0 TH/s |
| 2,400 W | Power Consumption | 3,610 W |
| 30.0 J/TH | Efficiency | 19.0 J/TH |
| 55 dB | Noise Level | 76 dB |
| 18.0 kg | Weight | 16.4 kg |
| 8,189 BTU/hr | BTU Output | 12,317 BTU/hr |
| 54/100 | Home Mining Score | 23/100 |
| — | Release Year | — |
| SHA-256 | Algorithm | SHA-256 |
| D-Central | Manufacturer | Bitmain |
Profitability Comparison
Bitcoin Space Heater S19 Edition
Bitmain T21 (190TH)
Based on BTC price of $79,029 and current network difficulty as of May 15, 2026. Actual results vary.
Verdict
Based on our multi-factor analysis, the Bitmain T21 (190TH) wins on 3 of 6 factors (efficiency, hashrate, price-performance). Its biggest concrete edge: 138% more hashrate (80.0 vs 190.0 TH/s). The Bitcoin Space Heater S19 Edition claws back ground on power consumption and home mining score and noise level. Cross-check the spec deltas and ROI table above against your own electricity rate before deciding.
Spec Deltas
Here is every spec where the Bitcoin Space Heater S19 Edition and Bitmain T21 (190TH) actually differ, with the gap quantified:
- Bitmain T21 (190TH) 138% more hashrate (80.0 vs 190.0 TH/s)
- Bitcoin Space Heater S19 Edition 34% better power draw (2,400 vs 3,610 W)
- Bitmain T21 (190TH) 37% better efficiency (30.0 vs 19.0 J/TH)
- Bitcoin Space Heater S19 Edition 28% better noise (55.0 vs 76.0 dB)
- Bitmain T21 (190TH) 9% better weight (18.0 vs 16.4 kg)
- Bitmain T21 (190TH) 50% more heat output (8,189 vs 12,317 BTU/hr)
- Bitcoin Space Heater S19 Edition 135% more home mining score (54.0 vs 23.0)
Cost & ROI Over Time
A miner pays for itself in profit, not specs. These projections track upfront cost against one, two and three years of net earnings at $0.10/kWh.
| Bitcoin Space Heater S19 Edition | Metric | Bitmain T21 (190TH) |
|---|---|---|
| $1,299 | Upfront cost (MSRP) | $1,700 |
| -$2.85 | Daily net profit | -$1.75 |
| -$2,339 | Net after 1 year | -$2,340 |
| -$3,380 | Net after 2 years | -$2,981 |
| -$4,420 | Net after 3 years | -$3,621 |
| Does not pay back at current rates (negative daily profit) | Payback period | Does not pay back at current rates (negative daily profit) |
Projections assume continuous operation, a flat $0.10/kWh rate, and no hardware degradation, pool fees, or BTC price change. Real-world ROI varies.
Best For...
Best for Profitability
TieBoth miners produce similar daily profit.
Best for Home Mining
Bitcoin Space Heater S19 EditionScore: 54/100. 55 dB noise level.
Best for Efficiency
Bitmain T21 (190TH)19.0 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Is the Bitcoin Space Heater S19 Edition or Bitmain T21 (190TH) more profitable?
At the current BTC price and a $0.10/kWh electricity rate, the Bitmain T21 (190TH) is more profitable at $-1.75/day compared to $-2.85/day for the Bitcoin Space Heater S19 Edition. Profitability depends heavily on your electricity rate — use the selector above to calculate with your actual costs.
Which is quieter, the Bitcoin Space Heater S19 Edition or Bitmain T21 (190TH)?
The Bitcoin Space Heater S19 Edition is quieter at 55 dB compared to the Bitmain T21 (190TH) at 76 dB. For home mining, lower noise levels make a significant difference in livability.
Bitcoin Space Heater S19 Edition vs Bitmain T21 (190TH): which fits a residential setup better?
The Bitcoin Space Heater S19 Edition scores 54/100 on our Home Mining Score (vs 23/100 for the Bitmain T21 (190TH)). This composite score factors in noise, power requirements, heat output, size, and setup ease — all critical for residential mining.
Bitcoin Space Heater S19 Edition vs Bitmain T21 (190TH): how much does the efficiency gap matter?
The Bitcoin Space Heater S19 Edition runs at 30.0 J/TH while the Bitmain T21 (190TH) runs at 19.0 J/TH — a difference of 11.0 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 37% better efficiency (30.0 vs 19.0 J/TH).
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