Easy Setup
Set up in 3 minutes using the app.

Price range: $1.816,00 through $2.387,00
Weight | 24 kg |
---|---|
Dimensions | 90 × 32 × 14 cm |
Power: | 1,000 W |
Area heated: | up to 50 m² |
Noise level: | 32 dB |
Mining power: | 32 TH/s – 42 TH/s ± 10% |
Bitcoin reward: | € 0.08 – 0.10 / kWh |
Model | 35 TH, 42 TH |
We accept
The 21energy Ofen 2 is perfect for you, if you want to heat your home and earn Bitcoin at the same time. Imagine having a heater that not only keeps your home warm, but also provides you with additional income. The Ofen 2 offers a heat output of up to 1,000 watts and can heat rooms up to 50 m². It runs whisper-quiet — under 32 dB on the lowest setting, 35 dB on the medium setting, and 42 dB on the highest setting.
The Ofen 2 from 21energy offers a heat output of up to 1,000 watts and enables uncomplicated plug & play commissioning for particularly easy handling. This combination of performance and user-friendliness enables effortless use and optimum heat supply. Simple connection via WLAN and initial configuration takes just a few minutes. With the supplied operating instructions and a video tutorial, installation is very easy and child’s play even for non-technical users.
Thanks to the innovative combination of convection and radiation, the heater provides even heat distribution. Even at it’s high output, the Ofen 2 remains extremely quiet and ensures quiet operation with less than 42 dB at 1,000 watts, creating a pleasant room climate.
The Ofen 2 made of premium materials & powder‑coated steel not only gives the heater an aesthetic appearance, but also ensures robustness and durability. With a mining power of up to 42 TH/s and an efficiency of up to 20 J/TH, the Ofen 2 offers impressive performance.
The air and dust filters of the Ofen 2 provide effective protection against dirt deposits in the appliance, protecting the internal hardware and extending the life of the heater. The galvanized sheet metal provides durability and corrosion resistance, ensuring reliable use of the heater in a wide range of conditions.
The built-in Bitcoin miner is compatible with various mining pools and can also be used for solo mining.
The savings potential of the Ofen 2 depends on individual energy costs and Bitcoin mining profitability.
Heat spaces up to 50 m² with a single device
Cashback of up to € 0.22 / kWh**
Whisper quiet 32 dB (as silent as a fridge)
Save up to 3× as much CO₂ as an electric car
Temperature control for optimal comfort and energy savings
Up to 42 TH/s hashrate for efficient Bitcoin mining*
User-friendly app for monitoring and controlling your heating from anywhere
Optimize energy use and reduce costs by heating during off-peak times
The heating cost savings were determined by comparing them with the average heating costs of all heating systems.
Set up in 3 minutes using the app.
Termostat & time schedules that maximize comfort and BTC yield.
Premium materials & powder‑coated aluminium.
Bitmern Mining Newsletter