21energy makes devices that heat your home using Bitcoin mining — turning your electricity bill into a Bitcoin earnings machine. Sento is the UK reseller. Same prices as buying direct from Austria.
€808
Est. Winter Earnings
4.8★
Trustpilot
5,000+
Happy Customers
30-day
Money Back
How It Works
Electricity In. Heat + Bitcoin Out.
21energy devices run Bitcoin mining hardware inside a beautiful heater casing. The heat that mining generates warms your room — and the Bitcoin rewards come back to you.
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Electricity In
Your device uses your home electricity — the same power a conventional electric heater would use
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Heat & Bitcoin Out
The mining process generates heat (warming your room) and Bitcoin rewards simultaneously
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Earnings Back to You
Bitcoin rewards are paid to your wallet — effectively subsidising your heating bill with crypto earnings
€808
Estimated winter earnings from one Ofen 2 Pro (Based on 1-year BTC average, 180 days heating season)
How it's calculated: €0.17 × 1.1 kW/h × 24 hours × 180 days
Bitcoin Heaters
Choose Your Heater
Three models. Same heating season earnings potential. Different power output and room sizes.
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UK Reseller Note: Sento is the UK ordering point for 21energy products. Prices match the official 21energy website. Orders are confirmed within 24 hours. We forward your details to 21energy who send you a direct payment link. You pay 21energy — they ship to your door. Questions? Email orders@aphiliate.co.uk
Entry Level
Ofen 2
Perfect for smaller rooms & first-time Bitcoin heater owners
€2,090 White /
€2,280 Black
Est. ~€808/winter earnings
1.1 kW heating output
Built-in ASIC Bitcoin miner
Made in Austria
30-day money-back guarantee
Free shipping over €200
🏆 Most Popular
Ofen 2 Pro
The bestseller — more power, more Bitcoin earnings
€2,490 White /
€2,680 Black
Est. ~€808/winter earnings
Higher hashrate than Ofen 2
Built-in ASIC Bitcoin miner
Whisper-quiet operation
Made in Austria
30-day money-back guarantee
Professional
Edge
Maximum mining power — for serious Bitcoin enthusiasts
€6,400
Highest hashrate available
Professional-grade ASIC mining
Maximum Bitcoin earning potential
Commercial-grade build quality
Made in Austria
30-day money-back guarantee
ASIC Miners
Also Available: ASIC Miners
21energy also supply Bitcoin ASIC miners for those who want standalone mining hardware. From the entry-level Antminer S9 at €94 to the professional Antminer S21 XP at €4,970.
Miner
RRP
Order
WhatsMiner M31S+
€290
Antminer S9
€94
Antminer S9 Silent
€210
Antminer S19
€490
Antminer S19k Pro
€740
Antminer S19 XP+ Hydro
€1,990
Antminer S21
€1,660
Antminer S21+
€3,320
Antminer S21 Pro
€3,540
Antminer S21+ Hydro
€3,590
Antminer S21 XP
€4,970
Avalon Q
€2,190
Prices as per 21energy website — last verified by Liam at Sento. Prices updated regularly. View full pricing guide →
💼 Business & Bulk Orders
Buying Multiple Units?
21energy products are increasingly popular for commercial heating applications — office spaces, data centres, co-working spaces and hotels. If you're considering 3+ units, get in touch for bulk pricing and business consultation.
Prices shown are as listed on the official 21energy website and are updated regularly by Sento. Sento acts as UK reseller — orders are confirmed within 24 hours and fulfilled by 21energy GmbH, Austria. Free shipping on orders over €200. 30-day money-back guarantee applies.
Place Your Order
How it works: Fill in your details below. We'll confirm your order within 24 hours and forward you a direct payment link from 21energy. You pay 21energy directly — we handle the ordering, they handle the shipping.
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Order Request Sent!
Thank you. We'll confirm your order within 24 hours and forward you a direct 21energy payment link. You pay 21energy directly — they ship straight to your door.