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Navien NCB-E
Model Number: NCB-E
Earlier NCB-E combi provides heating and hot water; confirm model availability.
Technical Specifications
Source: manufacturer product data
Prices depend on sizing, venting and piping in your home, so we quote every installation.
Sizing: the right size comes from a room-by-room heat-loss calculation, not the size of the old boiler or a rule of thumb. Oversized boilers short-cycle and waste fuel; steam systems are sized to the connected radiation instead. See how we approach boiler installation.
Home-Specific Operating Cost Review
No guaranteed annual savings or payback period
Historical Use
Fuel consumption and weather
Current Rates
Utility and delivered-fuel prices
System Design
Load, piping, controls, and temperatures
Full Specifications
- Model Number
- NCB-E
- Efficiency (AFUE)
- 95%
- Boiler Type
- Combi Boiler
- In Production
- Confirm with manufacturer
- Parts Warranty
- 5 years (single-family residential)
- Heat Exchanger Warranty
- 10 years (single-family residential)
Specifications sourced from the manufacturer product data.
Ideal For
Existing NCB-E owners and appropriately sized combi replacements
Expert Review: Navien NCB-E
The earlier NCB-E is a wall-hung condensing combi for hydronic space heating and on-demand domestic hot water. Navien now highlights NCB-H and NFC-H as its current combi families; verify NCB-E availability and parts support. Size the heating side from a heat-loss calculation and hot water from simultaneous fixture demand. Navien’s NCB-E warranty lists one year labor, five years parts and ten years heat-exchanger coverage for qualifying single-family residential installations. Follow its water-quality and maintenance instructions; no fixed rebate or savings is guaranteed.
Key Features & Technology
Wall-hung condensing combi
Space heating and domestic hot water
Earlier-generation family
Advantages
- One appliance serves two loads
- Wall mounting saves floor space
- Published residential warranty
Considerations
- Check availability and parts
- Hot-water demand needs separate sizing
- Maintenance depends on water quality
Sizing & Installation Notes
Combi boilers like the NCB-E are sized on two loads at once: the home's heat loss and the peak domestic hot water demand. In most Long Island homes the hot-water load is the larger one, so we size to your household's simultaneous shower and tap use.
Every Navien installation starts with a free in-home assessment covering the heat-loss calculation, venting and chimney condition, gas or oil supply sizing, and permit requirements for your town. Learn more about our boiler installation process, or see current rebate and incentive programs that may apply.
Warranty & Protection
Parts Warranty
5 years (single-family residential)
Heat Exchanger
10 years (single-family residential)
Our Guarantee
100% Satisfaction
All Navien boiler installations by Home+ Air & Heat include our 1-year workmanship warranty, covering labor and any installation-related issues.
Compare the Navien Lineup
| Model | Efficiency | BTU Range | Fuel | Heat Exchanger Warranty |
|---|---|---|---|---|
| NCB-E (this model) | 95% AFUE | Various sizes available | — | 10 years (single-family residential) |
| NFB-H | 95% AFUE | 13k - 200k BTU | natural gas/propane | 12 years full then prorated (residential) |
| NHB | 95% AFUE | Various sizes available | — | Before July 2018: 15 years; later prorated (residential) |
| NFB-C | 97.5% TE | Various sizes available | natural gas/propane | 12 years full then prorated residential; 10 years commercial |
| NFC-H | 95% AFUE | 13k - 200k BTU | natural gas/propane | 10 years (single-family residential) |
| NCB-H | 95% AFUE | 11k - 150k BTU | natural gas/propane | 10 years (single-family residential) |
| NHB-H | 95% AFUE | 8k - 150k BTU | natural gas/propane | Prorated schedule; see Navien warranty (residential) |
See the full Navien brand page for lineup context, or browse the Best Combi Boilers 2027 guide to compare across brands.
Frequently Asked Questions
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