Ofen 2 Pro
€2.240,00
€2.490,00
Free shipping
30-day-return
5.000+ Satisfied customers
Bought together
Ofen 2 Pro always includes a basic stand.
Basic stand with non-scratch feet for floor protection.
Product information
The 21energy Ofen 2 Pro 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 Pro offers a heat output of up to 1,100 watts and can heat rooms up to 55 m². It runs whisper-quiet — under 35 dB on the lowest setting, 40 dB on the medium setting and 45 dB on the highest setting.
Ofen 2 Pro
What customers say
5, 000+ satisfied customers and trusted by thousands of homes across Europe.
Verified
The app (iOS) is well made and feels intuitive, the heater itself is very quiet even when running at its maximum power. I have using it for 5 days now and so far I'm very happy. I almost never write reviews but this company deserves to get recognition
Daniel Garcia
January 14, 2026
Verified
Excellent service as always! Thank you again 😊
JonnyW
February 5, 2026
Verified
Had an error at first but to be fair they did everything to rectify it and put it right and more
andrew ferguson
April 2, 2026
Verified
Perfect ! I receive everything and travel was long. Thx to all team !
Vivien Gaillard
January 8, 2026
Verified
Top Support 👍
Alex Tornyossy
March 23, 2026
Verified
all good, works well, good support.
Fredrik Åhslund
December 22, 2025
Verified
Ofen 2 is good product and there is a good service support. The product is well designed and well manufactured. I got a minor bug issue at the beginning with the thermostat. Support solved it very quickly with an update.
Jidé Jidé
December 4, 2025
Verified
Awesome Team. Had a great conversation with a customer service agent, helped me understand the inner workings of mining!
Remington Splettstoesser
September 24, 2025
In the box
Ofen 2 Pro
Thermostat
Power cord
Manual
Calculate your earnings
You earn
Known from
Ofen 2 explained
Austria
Ofen 2 explained
Austria
Pay securely via
Efficient by design
Quiet warmth
Whisper-quiet (~35 dB) so it blends into your living room.
Cashback
77 high performance processors turn electricity into warmth and Bitcoin.
Desired temperature
Set your desired temperature and the thermostat maintains it day & night.
Built to last
Premium aluminium for long life and low maintenance.
Touch-safe design
Enclosed heating core and rounded edges, CE certified.
Quiet warmth
Whisper-quiet (~35 dB) so it blends into your living room.
Cashback
77 high performance processors turn electricity into warmth and Bitcoin.
Desired temperature
Set your desired temperature and the thermostat maintains it day & night.
Built to last
Premium aluminium for long life and low maintenance.
Touch-safe design
Enclosed heating core and rounded edges, CE certified.
Made in Austria
See it in action
Which heating saves you the most in {country}?
Austria
Pay securely via
Questions about Ofen 2 Pro
Can I operate the Ofen 2 Pro with a LAN cable?
Yes, there is a USB port on the back of the Ofen 2 Pro, through which you can connect a LAN cable using a suitable adapter.
How can I control the Ofen 2 Pro?
The Ofen 2 Pro can be controlled via the 21energy App. You can turn it on and off, adjust the heating levels, connect it to a thermostat, create schedules, and integrate it into your Home Assistant setup.
Do I need a Bitcoin wallet?
A Bitcoin wallet is required if you want to store the earnings from your mining pool yourself. Alternatively, you can send the earnings directly to an exchange and have them paid out in euros.
How do I receive the mined Bitcoins?
The Bitcoins mined by the Ofen 2 Pro are first credited to your mining pool account. From there, you can transfer them to your Bitcoin wallet or directly to an exchange. More details can be found in the <a href="https://21energy.com/pages/manual" target="_blank">user manual</a>, section 5.4.
Do I need a good internet connection?
The Ofen 2 Pro requires very little bandwidth (<1 Mbit/s). The most important factor is that the connection is stable and reliable.
Can the Ofen 2 Pro be mounted vertically?
This is not recommended by default and should only be done if the Ofen 2 Pro is placed and secured carefully and safely. The wall mount is designed only for horizontal installation.
Good for the environment
The operation of the Ofen 2 can save up to 3 tons of CO₂ per year compared to conventional heaters.
Dive into the specifics
Discover our innovative Bitcoin heaters and find out how it helps you to heat more efficiently and save money.
Set up in 3 minutes using the app.
