What Makes a Good Bitcoin Heater?
- Heating output appropriate to room size
- Quiet enough for domestic use
- Genuine Bitcoin earning potential with transparent calculations
- Build quality that justifies the price
- Clear warranty and return policy
- UK availability and support
21energy Ofen 2 Pro — Our Top Pick
The 21energy Ofen 2 Pro at €2,490 is our recommended choice for UK buyers in 2026. Austrian-made, 4.8-star Trustpilot rated, with 5,000+ satisfied customers. The estimated €808/winter earnings calculation is transparent and based on real Bitcoin price averages. Available through Sento as the UK reseller — same price as buying direct, with UK-based order support.
21energy Edge — For Serious Miners
The Edge at €6,400 is for Bitcoin enthusiasts who want maximum mining output in a domestic-friendly form factor. Significantly more hashrate than the Ofen range — this is for people who are serious about Bitcoin mining and want the heating benefit as a secondary consideration.
Heatbit One — The US Alternative
Heatbit is an American competitor at a similar price point. Good product, strong reviews — but less compelling for UK buyers given the US-centric support and the absence of ASIC miners in the product range. See our full 21energy vs Heatbit comparison for the detailed head-to-head.
Our Recommendation
For UK buyers in 2026, 21energy is the clear recommendation. The combination of Austrian quality, transparent earnings calculations, UK reseller access through Sento, and a full range of ASIC miners makes it the most complete offering in the market.
Sento is the UK ordering point for 21energy products. Prices match the official 21energy website and are updated regularly. Earnings figures are estimates — actual returns vary with Bitcoin price. Not financial advice. Updated March 2026.