Skip to content

We're upgrading our operations to serve you better. Orders ship as usual from Laval, QC. Questions? Contact us

Bitcoin accepted at checkout  |  Ships from Laval, QC, Canada  |  Expert support since 2016

1325 Rue Bergar, Laval, QC support@d-central.tech 1-855-753-9997 Mon-Fri: 8:30 - 18:00
Bitmain Antminer S21 Immersion (301Th)

Bitmain Antminer S21 Immersion (301Th)

Hashrate 301.0 TH/s Power 5,569 W Efficiency 18.5 J/TH
VS
Bitcoin Space Heater S19 Edition

Bitcoin Space Heater S19 Edition

Hashrate 80.0 TH/s Power 2,400 W Efficiency 30.0 J/TH

Bitmain Antminer S21 Immersion (301Th) vs Bitcoin Space Heater S19 Edition

Side-by-side specs, profitability, and home mining comparison.

Specifications Comparison

Bitmain Antminer S21 Immersion (301Th) Specification Bitcoin Space Heater S19 Edition
301.0 TH/s Hashrate 80.0 TH/s
5,569 W Power Consumption 2,400 W
18.5 J/TH Efficiency 30.0 J/TH
50 dB Noise Level 55 dB
17.2 kg Weight 18.0 kg
19,001 BTU/hr BTU Output 8,189 BTU/hr
44/100 Home Mining Score 54/100
— Release Year —
SHA-256 Algorithm SHA-256
Bitmain Manufacturer D-Central

Profitability Comparison

$/kWh

Bitmain Antminer S21 Immersion (301Th)

Daily Revenue 0.00013852 BTC $10.96
Daily Electricity -$13.37
Daily Profit -$2.41
Monthly -$72.29
Yearly -$879.56

Bitcoin Space Heater S19 Edition

Daily Revenue 0.00003681 BTC $2.91
Daily Electricity -$5.76
Daily Profit -$2.85
Monthly -$85.44
Yearly -$1,039.57

Based on BTC price of $79,095 and current network difficulty as of May 15, 2026. Actual results vary.

Verdict

Run the numbers across every spec and the Bitmain Antminer S21 Immersion (301Th) edges it: 4 of 6 factors go its way (efficiency, hashrate, noise level, price-performance). The standout gap is 276% more hashrate (301.0 vs 80.0 TH/s) in the Bitmain Antminer S21 Immersion (301Th)'s favour. The Bitcoin Space Heater S19 Edition holds the edge in power consumption and home mining score. The right pick still depends on your power cost and noise tolerance — the breakdowns above make that call concrete.

Winner: Bitmain Antminer S21 Immersion (301Th) — wins on 4 of 6 factors

Spec Deltas

The Bitmain Antminer S21 Immersion (301Th) and Bitcoin Space Heater S19 Edition diverge on the metrics below — each gap expressed as a real percentage, not a vague "better":

  • Bitmain Antminer S21 Immersion (301Th) 276% more hashrate (301.0 vs 80.0 TH/s)
  • Bitcoin Space Heater S19 Edition 57% better power draw (5,569 vs 2,400 W)
  • Bitmain Antminer S21 Immersion (301Th) 38% better efficiency (18.5 vs 30.0 J/TH)
  • Bitmain Antminer S21 Immersion (301Th) 9% better noise (50.0 vs 55.0 dB)
  • Bitmain Antminer S21 Immersion (301Th) 5% better weight (17.2 vs 18.0 kg)
  • Bitmain Antminer S21 Immersion (301Th) 132% more heat output (19,001 vs 8,189 BTU/hr)
  • Bitcoin Space Heater S19 Edition 23% more home mining score (44.0 vs 54.0)

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.

Bitmain Antminer S21 Immersion (301Th) Metric Bitcoin Space Heater S19 Edition
$3,333 Upfront cost (MSRP) $1,299
-$2.41 Daily net profit -$2.85
-$4,212 Net after 1 year -$2,339
-$5,092 Net after 2 years -$3,378
-$5,971 Net after 3 years -$4,418
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

Tie

Both miners produce similar daily profit.

Best for Home Mining

Bitcoin Space Heater S19 Edition

Score: 54/100. 55 dB noise level.

Best for Efficiency

Bitmain Antminer S21 Immersion (301Th)

18.5 J/TH — lower electricity cost per terahash.

Frequently Asked Questions

Which makes more money, the Bitmain Antminer S21 Immersion (301Th) or the Bitcoin Space Heater S19 Edition?

At the current BTC price and a $0.10/kWh electricity rate, the Bitmain Antminer S21 Immersion (301Th) is more profitable at $-2.41/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 Bitmain Antminer S21 Immersion (301Th) or Bitcoin Space Heater S19 Edition?

The Bitmain Antminer S21 Immersion (301Th) is quieter at 50 dB compared to the Bitcoin Space Heater S19 Edition at 55 dB. For home mining, lower noise levels make a significant difference in livability.

For mining at home, should I pick the Bitmain Antminer S21 Immersion (301Th) or the Bitcoin Space Heater S19 Edition?

The Bitcoin Space Heater S19 Edition scores 54/100 on our Home Mining Score (vs 44/100 for the Bitmain Antminer S21 Immersion (301Th)). This composite score factors in noise, power requirements, heat output, size, and setup ease — all critical for residential mining.

How far apart are the Bitmain Antminer S21 Immersion (301Th) and Bitcoin Space Heater S19 Edition on J/TH?

The Bitmain Antminer S21 Immersion (301Th) runs at 18.5 J/TH while the Bitcoin Space Heater S19 Edition runs at 30.0 J/TH — a difference of 11.5 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 38% better efficiency (18.5 vs 30.0 J/TH).

Compare Bitmain Antminer S21 Immersion (301Th) with...

Compare Bitcoin Space Heater S19 Edition with...

Shop Miners Browse our full catalog of ASIC miners, Bitaxe, and accessories. ASIC Repair 2,500+ miners repaired. Expert diagnostics and board-level repair. Miner Database Compare 500+ miners with live profitability data.