Navien NCB300 28kW Combi Boiler – Condensing High-Efficiency Gas Boiler

NAVIEN NCB300 28kW Combi Boiler – Condensing High-Efficiency Gas Boiler

Product Description:

The Navien NCB300 28kW Combi Boiler is designed to deliver powerful and energy-efficient heating and hot water for medium-sized homes. This advanced condensing boiler features innovative technology, a sleek compact design, and user-friendly smart controls for maximum performance and convenience.

With its ultra-low NOx emissions, stainless steel heat exchanger, and built-in Navien Smart Plus system, the NCB300 series is built to meet high-efficiency demands while reducing your environmental impact.

Perfect for new installations or boiler upgrades, the 28kW model offers consistent hot water flow and rapid heating response – even during high-demand periods.

Key Features:

• 28kW output – ideal for 2–3 bedroom homes
• ErP A-rated for heating and hot water efficiency
• Stainless steel heat exchanger for superior durability
• Navien Smart Plus technology – enables intelligent self-diagnosis and performance optimisation
• Ultra-low NOx emissions – eco-friendly and future-ready
• Compact, wall-hung design – fits easily in cupboards or small spaces
• Quiet operation and reliable performance
• Compatible with Navien Smart Control app (Wi-Fi enabled – sold separately)

Specifications:

• Model: Navien NCB300 28kW Combi
• Type: Condensing combi boiler
• Fuel: Natural gas
• Output (CH): 28kW
• Output (DHW): 28kW
• Flow rate: Approx. 11.5 l/min @ 35°C rise
• Efficiency Rating: 92–94%