| Model | Eco 25 | |
| Parameters | ||
| Rated heating output, min / max | kW | 4 / 20,9 |
| Heating output, min / max | kW | 3,5 / 20,2 |
| Efficiency (60 / 80 °С) | % | 96,9 |
| NOX class | 6 | |
| Flue gas temperature | °С | 60 |
| G20 gas flow rate, min / max | m3 / s | 0,35/2,1 |
| Energy efficiency class | A | |
| Overall features | ||
| Net / gross weight | kg | 28 / 30,5 |
| Compact size (H × W × D) | mm | 653 × 412 × 310 |
| Package size (H × W × D) | mm | 736 × 465 × 362 |
| DHW circuit | ||
| Hot water temperature, min / max | °С | 35 / 60 |
| Hot water flow at ΔТ=30 °С | l/min | 10,3 |
| Hot water flow, min | l/min | 2,0 / 14,5 |
| Water pressure, min / max | bar | 0,5/10 |
| Heating circuit | ||
| Operating pressure, min / max | bar | 0,8 / 3 |
| Expansion vessel volume | l | 8 |
| Expansion vessel pre-filling pressure | bar | 1 |
| Heating circuit temperature, min / max | °C | 35 / 80 |
| Electrical features | ||
| Voltage / frequency | V / Hz | 230 / 50 |
| Power consumption, max | W | 120 |
| Protection class | IPX4D | |
| Gas pressure | ||
| G20 natural gas (inlet pressure), min / max� | mbar | 6 / 20 |
Hydraulic Group
- Hydraulic group material: 25B, 35B, 42B - brass; 25, 35 - composite.
- Main heat exchanger made of stainless steel (for all models)
- Plate heat exchanger made of stainless steel
- Double heating circuit NTC temperature sensor
- 8l expansion vessel
- Integrated water flow turbine
- 0.5 bar low water pressure switch
- 3 bar pressure relief valve
- Automatic air bleeding valve
- 3-way motorized valve antiblockage function
Electric Circuit
- Safety system compatible with C EN 298
- IPX4D electrical protection
- Wi-Fi support with OPENTHERM interface
- Weather-integrated outdoor air sensor (can be obtained externally)
- Anti-freeze system
- Overheating protection system
- Flue gas safety system
- Automatic diagnosis function