Startup Show Supersale!

21energy on the 2 Minuten 2 Millionen show! Live on March 11th on Puls 4 and Joyn at 8:15 PM. Get an exclusive -21% discount now — Sale ends in 3d 04h 23m 13s

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Free shipping
30-day-return
Made in Austria

Get a Bitcoin Heater

Ofen

800 W
Power
32 m²
Area heated
35 dB
Noise level
up to 10 TH/s
Mining power
€ 0.033 / kWh
Bitcoin reward
(1-year average)*
€ 0.070 / kWh
Bitcoin reward
(4-year average)*
52 × 35 cm
Size
22 kg
Weight
€782,10
-21%
€990,00
incl. VAT & shipping
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21energy Ofen Rendering

Ofen Pro

Bestseller
1,100 W
Power
44 m²
Area heated
35 dB
Noise level
up to 40 TH/s
Mining power
€ 0.122 / kWh
Bitcoin reward
(1-year average)*
€ 0.263 / kWh
Bitcoin reward
(4-year average)*
58 × 38 cm
Size
35 kg
Weight
€2.741,30
-21%
€3.470,00
incl. VAT & shipping
Buy now
Free shipping
30-day-return
Made in Austria
*As at 02.2025

Take part and win! We are giving away an Ofen.

Enter the giveaway
Free shipping
30-day-return
Made in Austria
Ofen Pro
Ofen Pro
Ofen
€990,00
Enter the giveaway
Free shipping
30-day-return
Made in Austria

Calculate your annual heating savings

Select product:
Ofen Pro
Ofen
Country
Electr. costs (/kWh)
-
0.20
+
Area heated
97
Variable electricity price
PV system
Heat pump
Heat pump
- € 825
/ Year
Gas & Oil
Gas & Oil
- € 2,556
/ Year
Electric
Electric
- € 3,300
/ Year
Bitcoin heater
Bitcoin heater
- € 3,300
/ Year
+ € 4,342
/ Year
Average heating cost savings per year. *
€ 3,269
save up to 7 tons of CO₂ / year
Calculate in detail
* The heating cost savings were determined by comparing them with the average heating costs of all heating systems.

Dive into the specifics

Discover our innovative Bitcoin heaters and find out how it helps you to heat more efficiently and save money.