Grow Your Bitcoin Wealth, Sustainably
Our Vision
Warmth Meets Wealth
Embrace a sustainable, low time preference lifestyle while saving in bitcoin, the hardest money. Discover innovations - like heaters that mine bitcoin from 21energy - to transform your life and wallet.
Join the bitcoin movement in two clicks.
Who Is This For
Innovators and Freedom Seekers
Our solutions empower diverse spaces with energy independence and bitcoin-earning potential:
- Homes: Heat your living space while mining bitcoin sustainably.
- Summerhouses: Power off-grid retreats with solar and earn crypto.
- Saunas: Explore the development of our flagship bitcoin mining sauna.
B2B Project Sales
- Offices: Optimize energy use and boost profits with smart tech.
- Warehouses: Harness surplus energy for large-scale bitcoin gains.
Contact us to learn more how mining tech can support your use case.
Heaters
from 21energy.com
Ofen 2
€1.113,00
Ofen Pro
€3.470,00
Visit WEBSHOP
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Calculator
Profitability calculator
Proof It Works
A Swedish home uses solar power to heat and mine, earning €383/year in bitcoin.
Your setup could do the same. Visit the 21energy profitability calculator and get a personalised ROI calculation for your home, sommerhouse or office space.
Podcast
lynbtcsfo x Warmth & Wealth Podcast
Dive into the Warmth & Wealth Podcast for real talk on sustainable living and bitcoin wealth. We unpack eco-friendly innovations, share success stories, and offer practical tips to grow your crypto sustainably. New episodes bring fresh ideas to your ears.
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Ready to become sovereign?
Case Studies: Summerhouse in Gothenburg, Sweden
Here’s how the Ofen Pro performs in a summerhouse in Gothenburg, Sweden, under two scenarios.
Scenario 1: Wall Socket Power
- Setup: Ofen Pro plugged into a standard wall socket (1,100 W) at a summerhouse in Gothenburg.
- Electricity Cost: Sweden’s average rate is ~€0.25/kWh. Running 24/7: 1.1 kW x 8,760 hrs x €0.25 = €2,409/year.
- Bitcoin Earnings: At ~€0.263/kWh (4-yr avg), it earns 1.1 kW x 8,760 hrs x €0.263 = €2,535/year.
- Net Result: €2,535 (earnings) - €2,409 (cost) = €126 profit/year plus free heating for the 44 m² summerhouse.
Takeaway
Even on grid power, the Ofen Pro turns heating into a money-making opportunity.
Scenario 2: Excess Solar Energy
- Setup: Ofen Pro powered by excess solar energy at the same Gothenburg summerhouse (avg. 4 kWh/day surplus from a typical 5 kW solar system).
- Free Energy: Uses surplus solar power that would otherwise go to waste - no grid costs.
- Bitcoin Earnings: With 4 kWh/day available: 4 kWh x 365 days x €0.263/kWh = €383/year.
- Net Result: €383 profit/year plus free heating, all from sustainable energy.
Takeaway
Pairing with solar maximizes savings and sustainability, making your summerhouse a bitcoin-earning retreat. Numbers and calculations are exemplary ballpark and depend on various factors.
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you will be forwarded to our 21energy partner page
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