Ofen

Regular price
€990,00
Sale price
€990,00
Regular price
incl. tax, excl. shipping
800 W
Power
32 m²
Area heated
€ 0.077*
Cashback per kWh
* Average of the last 48 months
Want more bitcoin cashback?
Check out Ofen Pro with €0.28 cashback / kWh.
  • 21energy arrow symbol30-day return policy
  • 21energy package symbolFree standard shipping over €200.00
Visa
Mastercard
Maestro
American Express
Klarna
EPS
Apple Pay
Google Pay

Power: 380 - 800 W

Area heated: up to 32 m²

Noise level: whisper quiet under 40 dB at 500 W

Mining power: up to 10 TH/s, efficiency up to 75 J/TH (+/- 10%)

Ease of use: simple thanks to plug & play commissioning

Warranty & safety: 1 year warranty & very affordable spare parts available - CE compliant

New model: updated housing and new Wi-Fi access point 

Product details

Heating costs calculator / year
Country
Electr. costs in /kWh
0,23
+
Heat pump
– € 1.400
Gas & Oil
– € 2.800
Electric
– € 4.160
Bitcoin heater
– € 0
+ € 60
Save € 1.460 - € 4.220 and 7 tons of CO2 every year!
Calculate your heating costs
ofen pro product bitcoin heater 21energy
  • ofen pro product bitcoin heater 21energy
ofen pro product bitcoin heater 21energy

How does it work?

Easy peasy. This is how you get up to 100% and more cashback and save our planet.
1

We put a bitcoin miner in a soundproof heater casing.

2

You start the heater and connect it to your wallet.

3

You heat your apartment and earn bitcoin at the same time.

Calculate your savings potential

Bitcoin Heater

S9 Miner inside

Small dimensions

Compact size, fitting into any apartment. 52x35cm, 19kg.

Plug & Play

Easy setup thanks to Plug & Play technology. Simply plug in and start heating.

Warranty & safety

1 year warranty & very affordable repair service - CE compliant

40 dB – whisper silent

Enjoy a cozy warm home without the noise of a loud miner.

Sustainable. Big time.

Reduce up to 7t of CO2 with bitcoin heating. Good for your wallet and the environment.
Ofen
Dyson HP07
Oil heating
Gas heating
Heat pump
Acquisition costs
from € 990,00
€ 849,00
€ 14.000,00
€ 12.000,00
€ 10.000,00
Installation costs
€ 0,00
€ 0,00
€ 3.000,00
€ 3.000,00
€ 5.000,00
Resell
Excellent
Bad
Bad
Bad
Bad
Maintenance effort
Low
Low
Moderate
Moderate
Moderate
Avg. area heated
up to 44 m2
40 m2
120 m2
120 m2
120 m2
Operating costs (Winter)
€ 4.160,00
€ 4.160,00
€ 2.915,00
€ 2.800,00
€ 1.040,00
Income (Winter single-family house)
up to € 4.613,00
€ 0,00
€ 0,00
€ 0,00
€ 0,00
Heating profit
from € 453,00
€ -4.160,00
€ -2.915,00
€ -2.800,00
€ 0,00
Calculations per second
up to 40 TH/s
0
0
0
0
Income per kWh
up to € 0,288
€ 0,00
€ 0,00
€ 0,00
€ 0,00
CO2 emissions in kilograms
as low as 0
880
7720
4940
as low as 0
Sustainability
Excellent
Moderate
Bad
Bad
Excellent
Two-dimensional energy use
Yes
No
No
No
No