Navien NCB-250/150H Condensing Combi-Boiler – 250K BTU DHW / 150K BTU Heat
Regular price $1,808.27 Save $-1,808.27/
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The Navien NCB-250/150H is a 95% AFUE, Energy Star certified condensing combi-boiler built for larger residential applications. It delivers up to 150,000 BTU/hr for space heating (120,000 BTU/hr net AHRI) and on-demand domestic hot water, with an 11.1:1 heating turndown ratio and 15:1 DHW turndown ratio for responsive, efficient modulation.
Key Specifications
- DHW Input: Up to 250,000 BTU/hr
- Heating Input: 150,000 BTU/hr (Net AHRI: 120,000 BTU/hr)
- AFUE: 95% | Energy Star Certified
- Heating Turndown Ratio: 11.1:1
- DHW Turndown Ratio: 15:1
- Heat Exchangers: Dual stainless steel
- Venting: 2" or 3" (PVC, CPVC, polypropylene, stainless steel)
- Gas Type: Natural gas or propane (field convertible)
- Smart Controls: NaviLink Wi-Fi compatible
- Cascade: Compatible with up to 15 NPE tankless water heaters
- Altitude: Certified up to 10,100 ft
Product Transparency
- What it is: A wall-hung condensing combi-boiler for residential space heating and on-demand domestic hot water
- Who it is for: Homeowners and HVAC professionals in medium to large homes requiring high-output, smart-home-compatible heating and hot water
- What it is NOT: This is not a standalone water heater or commercial boiler. Professional installation by a licensed HVAC technician is required.
Shipping & Returns
- Processing time: 1–2 business days
- Estimated delivery: 5–8 business days
- Returns accepted within 30 days of delivery in original, uninstalled condition