Bitcoin Mining • Space Heating • Energy Efficiency
21energy
Revolutionizing Space Heating with Bitcoin Mining
Austrian Innovation in Bitcoin Heating
21energy is an Austrian startup pioneering Bitcoin heating technology – devices that mine Bitcoin while providing efficient space heating. All products are handcrafted in Austria, combining cutting-edge mining hardware with innovative heating solutions for both residential and industrial applications.
Key Features:
- 100% heat conversion efficiency
- Built-in ASIC mining hardware
- WiFi/LAN connectivity
- Braiins OS+ optimization
- Eco-friendly heating solution
Residential
Ofen
- 800W heat output
- 32m² coverage
- 35dB noise level
- 10 TH/s hashrate
- Antminer S9 (refurbished)
- ~75 J/TH efficiency
- 52×35 cm, 22 kg
- €990
Ofen Pro
- 1,100W heat output
- 44m² coverage
- 35dB noise level
- 40 TH/s hashrate
- Antminer S19
- ~20 J/TH efficiency
- 58×38 cm, 35 kg
- €3,470
Industrial
Shield
- 1.1-2.0kW heat output
- 80m² coverage
- 50-70dB noise level
- 24 TH/s hashrate
- Antminer S9 boards
- ~75 J/TH efficiency
- Wall/floor mounting
- €1,497 (sale €748.50)
Edge
- 1.5-8.28kW heat output
- 360m² coverage
- 50-70dB noise level
- 360 TH/s hashrate
- 2× Antminer S19k Pro
- ~18 J/TH efficiency
- Ceiling mount options
- €11,700
Mining Hardware & Equipment
Bitcoin Miners
- Antminer S9
- ~14 TH/s hashrate
- 7nm chips
- €99
- Antminer S19k Pro
- 110-120 TH/s hashrate
- 2.53-2.76 kW power
- ~18 J/TH efficiency
- €1,290
- Antminer S21 Pro
- 234 TH/s hashrate
- 3.51 kW power
- ~15 J/TH efficiency
- €5,790
Mining Accessories
- Silent Kits
- Silent Kit S19/S21: €249
- Noise reduction adapters
- Cooling Solutions
- 120mm fans: €14
- 60mm fans: €5
- Ventilator grilles
- Power Supplies
- APW3++ PSU: €39
- Power cords: €29-49
Software Integration & Compatibility
Mining Software
- Braiins OS+
- Auto-optimization for +30% efficiency
- Pre-installed on all heaters
- Compatible with S9/S19/S19k/S21
- Mining Pool Support
- Any Bitcoin mining pool
- Solo mining capability
- Easy pool configuration
Smart Integration
- Mobile/Web App
- Remote monitoring
- Temperature control
- Mining statistics
- Smart Home Integration
- External thermostat support
- Timer functionality
- Automated cycling
Environmental Impact
21energy's Bitcoin heaters represent a revolutionary approach to sustainable heating. By combining space heating with Bitcoin mining, these devices create a dual-purpose solution that maximizes energy efficiency while contributing to the Bitcoin network.
Carbon Reduction
- Ofen: Up to 3 tons CO₂/year savings
- Edge: Up to 30 tons CO₂/year savings
- 100% heat conversion efficiency
- Local manufacturing in Austria
Economic Benefits
- Mining rewards offset heating costs
- €3,000-4,000/year savings vs. conventional heating
- Plug-and-play installation
- Smart home integration
Ideal Applications
Residential
- Homes & apartments
- Home offices
- Garages & workshops
- Small businesses
Commercial
- Warehouses
- Server rooms
- Factories
- Agricultural buildings
Specialized
- Data centers
- Breweries
- District heating
- Construction sites
Braiins OS+ Integration
All 21energy Bitcoin heaters come pre-installed with Braiins OS+ firmware, delivering superior mining performance and efficiency. This advanced firmware replaces stock configurations, enabling true plug-and-play operation with enhanced capabilities.
Hardware Integration
Residential Models
- Ofen:
- Antminer S9 (new)
- ~10 TH/s at ~75 J/TH
- +30% hashrate with OS+
- Ofen Pro:
- Antminer S19 (throttled)
- ~40 TH/s at ~20 J/TH
- +30% efficiency with OS+
Industrial Models
- Shield:
- Antminer S9 cluster
- ~24 TH/s at ~75 J/TH
- +30% performance with OS+
- Edge:
- Multiple S19k Pro units
- Up to 360 TH/s total
- ~18 J/TH with OS+ (vs 23 J/TH stock)
Performance Features
Autotuning
- 30-minute initial optimization
- Per-chip voltage/frequency tuning
- 20-30% higher hashrate
- Maximum efficiency at any power level
Power Control
- Strict power/hashrate targets
- Dynamic power scaling (DPS)
- Temperature-based throttling
- 900W-2,760W per unit range
Thermal Management
- 100% fan speed during tuning
- Automatic temperature protection
- Optimal ASIC temperature maintenance
- Prevents efficiency degradation
Setup & Control
Installation
- Pre-installed on all units
- Plug-and-play operation
- Minutes to configure
- Automatic updates via 21energy
Control Interface
- 21energy mobile/web app
- Time-of-use optimization
- Up to 50% cost reduction
- Home automation integration
Efficiency Benefits
Braiins OS+ ensures optimal mining performance while maintaining 100% heat conversion efficiency. The firmware's advanced features enable:
- •20-30% higher hashrate at same power consumption
- •Lower J/TH ratio (e.g., 18 J/TH vs 23 J/TH on S19k Pro)
- •Optimal thermal management for consistent performance
- •Automatic power scaling based on heating needs