| Model NO. | B1 |
| Type | Forced Exhaust |
| Energy Efficiency Grade | One |
| Interior Material | Copper |
| Installation | Indoor Standard Installation |
| Control Mode | Mechanical Edition |
| Usage | Bathroom, Kitchen, Industrial, Home |
| Fuel | Gas-Fired |
| Structure | Water Tube |
| Water Circulation | Forced Circulation |
| Package Size | 100.00cm * 100.00cm * 160.00cm |
| Gross Weight | 260.000kg |


Delivers central heating (radiators or underfloor) and domestic hot water. Supports temperature ranges of 30–80°C for radiators and precise 35–60°C for stable hot water supply using a gas proportional valve.
| Model Specification | 20kW Unit | 24kW Unit |
|---|---|---|
| Max Heat Output | 17.8 kW | 21.4 kW |
| Thermal Efficiency | >90% | >90% |
| Effective Heating Area | <100 m² | <150 m² |
| Hot Water Output (Δt=25K) | 10.0 kg/min | 12.0 kg/min |
| Rated Voltage | 220V~/50Hz | 220V~/50Hz |
| Standby Power | 3W | 3W |



For 80-150m², 24KW is sufficient for one kitchen and two bathrooms. For units over 150m² or villas, 28KW or above is recommended. Southern homes without insulation should consider 20-30% more power.
The system prioritizes hot water. If you turn on the tap while heating, the machine temporarily suspends heating to provide hot water and resumes heating once the tap is closed.
Yes. Condensing boilers have thermal efficiency over 107%, saving 15-20% on gas compared to standard models. Long-term usage easily covers the initial price difference.
Absolutely. You can opt for an open-air radiator system which doesn't require wall damage and has a quick construction period.
Kept powered and connected to gas, the unit maintains a low temperature automatically to prevent freezing while you are away briefly. For long absences, it is best to drain the system.
No. Power is only used for the fan and pump (100-200W). Since they don't run continuously, monthly consumption is similar to a household refrigerator.