21energy Ofen 2
The 21energy Ofen 2 is a home heater miner that turns SHA-256 Bitcoin mining into room heat, producing 40 TH/s at 1000 W (25 J/TH). It mines BTC and BCH and was released in April 2026.
Income vs electricity · Mines BTC
Where to buy 0
No seller lists this miner yet.
Profit
| Income | Electricity | Profit | |
|---|---|---|---|
| Day | $1.52 | −$0.87 | $0.65 |
| Week | $10.64 | −$6.12 | $4.53 |
| Month | $45.62 | −$26.21 | $19.41 |
| Year | $555.00 | −$318.86 | $236.14 |
Price history
━ Average price ━ Lowest price
Specifications
About this miner
The 21energy Ofen 2 is an ASIC miner by 21energy for the SHA-256 algorithm, rated at 40.0 TH/s on 1,000 W. It came out in April 2026. Its efficiency of 25.0 J/TH is close to the median SHA-256 miner we track (26.4 J/TH). At $0.036/kWh it ranks #124 of 247 SHA-256 miners by daily profit, earning about $0.65 a day mining BTC. No store lists it on MinerPrices at the moment. At 35 dB it is quiet enough for a home or office. It is designed as a home heater that mines while it heats.
BCH
BSV
BTC
FB
NMC
PPC
QUAI
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