Navien NCB500 2S+/41K 41kW Combi Boiler Compact Hydrogen Ready with High DHW Output and Stainless Steel Heat Exchangers
Navien NCB500 2S+/41K 41kW Combi Boiler offers 16.8 l/min DHW flow, hydrogen-ready operation, stainless steel exchangers, and a 10-year warranty—engineered for high-performance efficiency.
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- Estimated Delivery: For most items (over 99% of our products), orders placed before 3pm on working days will be dispatched the same day with our Fast DELIVERY 1st class service. For the rare items not immediately in stock, dispatch may take 1-3 working days after receiving your order. If your order cannot be dispatched the same day, we will notify you via email.
- For boilers: We aim to dispatch on the next working day. However, in some cases, it may take 2-3 working days to dispatch. Rest assured, we will always strive for the fastest possible turnaround.
The Navien NCB500 2S+/41K 41kW Combi Boiler is a top-tier heating solution for homes with high hot water demand. With a 16.8 l/min DHW flow rate at 35°C rise, it ensures consistent, reliable hot water even during peak usage.
Built with stainless steel heat exchangers, the boiler delivers durability and sustained energy efficiency. Its 6:1 turndown ratio provides smart modulation, adjusting output based on usage to save energy and maintain comfort.
Future-ready with hydrogen blend compatibility up to 20%, this boiler aligns with modern energy targets. It reaches an ErP A+ rating when connected to 3 Smart Plus thermostats, optimizing energy use across multizone heating systems.
Its compact 680 × 395 × 283mm footprint fits easily into smaller homes, while quiet 48 dBA operation ensures low-noise performance. A 10-year warranty reinforces the unit’s long-term reliability and peace of mind.
Key Features
Stainless Steel Heat Exchangers – Ensure efficiency and durability across years of use
High DHW Flow Rate – 16.8 l/min at 35°C rise to support high-demand homes
6:1 Turndown Ratio – Precision modulation for energy savings and comfort
Hydrogen Ready – Supports 20% hydrogen blend for future compliance
ErP A+ Efficiency – Achieved with 3 Smart Plus thermostats in multizone setups
Compact Design – Measures 680mm (H) × 395mm (W) × 283mm (D), easy to install in tight spaces
Quiet Operation – Operates at just 48 dBA for minimal disturbance
10-Year Warranty – Offers extended protection and performance assurance
Applications
Large Homes – Ideal for properties requiring strong hot water performance
Modern Heating Upgrades – Energy-efficient solution for future-ready heating
Tight-Space Installations – Slim design makes it suitable for cupboards or confined areas
Technical Specifications:
| Feature | Details |
|---|---|
| Product Name | Navien NCB500 2S+/41K 41kW Combi Boiler |
| Model Number | PNCB5000041L001 |
| Fuel Type | Natural Gas / LPG |
| Heat Output (CH) | 26 kW |
| DHW Output (Min/Max) | 4.6 / 41.0 kW |
| DHW Flow Rate (35°C Rise) | 16.8 l/min |
| CH Condensing Max Output | 28.2 kW |
| ERP Rating | A (A+ with Smart Plus thermostats) |
| SEDBUK SAP 2009 Rating | 89% |
| Noise Level | 48 dBA |
| Max Vertical Flue (100mm) | 8 meters |
| Max Horizontal Flue (100mm) | 7 meters |
| NOx Class | 6 |
| Solar Compatible | Yes |
| Warranty | 10 Years |
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