Best for: Combi Boilers & Compact Spaces
Navien specializes in hot water and condensing systems (no steam boilers available).
Yes — Navien boilers are a solid mid-range option. Our editorial score is 4.8/5 based on published efficiency, climate fit, warranty, features, and price positioning. Navien is associated with KD Navien; confirm the exact model platform, parts path, and coverage rather than assuming they are shared. For a Long Island home, compare the exact matched system and written installation scope because design and commissioning can matter as much as the badge on the equipment.
Ratings are editorial comparison scores—not customer reviews, installation counts, or manufacturer endorsements.
A useful Navien comparison starts with the exact indoor and outdoor model pairing—not the brand name alone. Home+ Air & Heat can review Navien boiler options for homes in our covered Nassau County and western Suffolk service areas, then document whether the proposed equipment, capacity, electrical scope, and installation approach fit the project.
Before work is authorized, ask for the design method, AHRI match where applicable, installer or dealer qualification required by the manufacturer, registration responsibility, parts coverage, labor coverage, exclusions, and current incentive assumptions in writing. Those details vary by model, project, contractor status, installation date, and current program rules.
Navien tankless water heaters and combi boilers are made by KD Navien Co., Ltd., a South Korean manufacturer founded in 1978. Navien America, the U.S. arm, is headquartered in Irvine, California. Units are manufactured in South Korea and sold in the U.S. through plumbing and heating wholesalers.
Planning a Navien project on Long Island? See how we install and size it for Nassau & western Suffolk homes →
Navien rates 4.8 out of 5 in our mid range-tier boiler assessment. The scoring reflects build quality, parts availability on Long Island, warranty terms, and how the equipment holds up in the homes we service. It fits best when combi boilers & compact spaces. Reviews are only half the picture — sizing and installation quality drive most of the failures we get called to.
This is Home+ Air & Heat's own editorial assessment as an insured installing contractor, not an average of customer star ratings.
Same manufacturer, different equipment focus—so you get intent-matched detail without duplicate canonical URLs.
Navien strikes an excellent balance between performance, features, and value. Here's what Navien offers.
Up to 95% AFUE helps reduce your monthly energy bills.
Salt-resistant components ideal for Long Island's waterfront communities.
Overall Score
Great For
Not Ideal For
Navien remains #5 in the overall 2027 ranking. Its current residential selection includes NCB-H and higher-heating-input NFC-H combis plus heating-only NFB-H and NHB-H. NFB-C is marketed for commercial use; earlier NCB-E and NHB records are not the current H-series. Bosch stays #4 for a broader documented mix of residential configurations. NCB-H reaches 150,000 BTU/h heating input across its models; NFC-H reaches 199,900 BTU/h. Select by heat loss, hot-water demand and venting, not by ranking alone. The current combi warranties list one year labor, five years parts and ten years exchanger for qualifying single-family use. Heating-only exchanger terms can be prorated and commercial or older-unit terms differ. Verify local parts, service and incentives for the exact model.
— Blake Ruwali, Home+ Air & Heat
Navien models with published specifications.
Earlier NCB-E combi provides heating and hot water; confirm model availability.
Best for: Existing NCB-E owners and appropriately sized combi replacements
$4,000 - $7,000installed
View Full DetailsNavien boiler models with published AFUE, boiler type and typical installed price ranges.
Model: NCB-E
Earlier NCB-E combi provides heating and hot water; confirm model availability.
Estimated Installed Price:
$4,000 - $7,000
Best For
Existing NCB-E owners and appropriately sized combi replacements
Model: NFB-H
NFB-H fire-tube heating-only boiler offers 95% AFUE in two sizes.
Estimated Installed Price:
$3,500 - $6,000
Best For
Homes sized for NFB-175H or NFB-200H with separate hot water
Model: NHB
Earlier NHB heating boiler; exchanger warranty depends on manufacture date.
Estimated Installed Price:
$4,500 - $7,500
Best For
Existing NHB installations after load and manufacture-date review
Model: NFB-C
NFB-C commercial fire-tube heating boiler; Navien quotes 97.5% thermal efficiency, not residential AFUE.
Estimated Installed Price:
Contact for pricing
Best For
Commercial hydronic projects designed by qualified professionals
Model: NFC-H
NFC-H fire-tube combi offers higher heating capacity than NCB-H.
Estimated Installed Price:
Contact for pricing
Best For
Higher-load homes where a correctly sized combi meets hot-water demand
Model: NCB-150H/180H/210H/240H
NCB-H water-tube combi pairs 95% AFUE heating with on-demand hot water.
Estimated Installed Price:
Contact for pricing
Best For
Homes whose heat loss and hot-water demand fit a selected NCB-H
Model: NHB-55H/80H/110H/150H
NHB-H wall-hung heating-only boiler comes in four sizes from 55H to 150H.
Estimated Installed Price:
Contact for pricing
Best For
Homes needing load-matched heating-only equipment
*Prices are estimates for Nassau County installations. Actual cost depends on home size, system complexity, and model selection.
Every Navien model family we track, with efficiency, size range, heat-exchanger warranty and a link to the manufacturer's data. Discontinued lines are flagged so you know what parts and service support to expect. Installed prices depend on your home, so every install is quoted.
| Model | Type | Fuel | AFUE | BTU input | Heat exchanger warranty | Source |
|---|---|---|---|---|---|---|
| NCB-E | Combi | — | 95% | — | 10 years (single-family residential) | Manufacturer |
| NFB-H | Condensing | natural gas/propane | 95% | 13k–200k | 12 years full then prorated (residential) | Spec sheet |
| NHB | Condensing | — | 95% | — | Before July 2018: 15 years; later prorated (residential) | Manufacturer |
| NFB-C | Condensing | natural gas/propane | 97.5% | — | 12 years full then prorated residential; 10 years commercial | Spec sheet |
| NFC-H | Combi | natural gas/propane | 95% | 13k–200k | 10 years (single-family residential) | Spec sheet |
| NCB-H | Combi | natural gas/propane | 95% | 11k–150k | 10 years (single-family residential) | Spec sheet |
| NHB-H | Condensing | natural gas/propane | 95% | 8k–150k | Prorated schedule; see Navien warranty (residential) | Spec sheet |
Estimated installed price: $3,500–$8,000. Estimate only, not a verified quote. Installed price varies with the model, your home and the system type, so every install is quoted.
Home+ services and installs Navien boilers across Nassau County and western Suffolk. See boiler installation, boiler repair, or compare every brand's lineup.
Understanding what's covered and how to protect your investment.
Parts Warranty
5 years on researched current residential series
Covers major components like controls and pumps
Heat Exchanger
10 years combi; heating-only varies by series
The heart of your boiler—cast iron or stainless steel
Labor Coverage
1 year on researched residential series
Manufacturer coverage for service calls
Extended Options
Available through dealer
Additional protection beyond standard warranty
Installed prices for Navien boilers range from $3,500 to $8,000 in Nassau County. Price varies by model efficiency, home size, and installation complexity.
$3,500 - $4,985
Entry-level models with solid performance
$4,985 - $6,470
Best balance of features and value
$6,470 - $8,000
Top-tier efficiency and features
Standard Installation
New boiler, same location
Steam-to-Hot Water Conversion
Complete system change
Chimney Liner
Required for high-efficiency
Permit & Inspection
Nassau County requirements
* Prices reflect typical installed costs in Nassau County as of September 2026. Actual costs may vary based on home size, system complexity, and local factors.
Recent Google reviews
Recent public reviews from homeowners who hired Home+ Air & Heat.
Bipul Mainali
Long Island, NY · Jan 2026
“They replaced my old, oxidized copper pipes connected to the boiler. The work was completed neatly, and the price was fair.”
Aaron Ramnarine
Long Island, NY · Jan 2026
“These guys do great work and are easy to deal with. I needed some work done on my boiler for the winter and everything was done easily in a timely manner. Will definitely be using them again in the future.”
Matthew Hoosein
Long Island, NY · Jan 2026
“I had a great experience with Homets Air and Heat. My heating system stopped working the other day, and they responded quickly with a clear explanation and prompt repair.”
Lochana Subedi
Hicksville, NY · Jan 2026
“I am a tenant in Hicksville, and when my heat went out during this cold stretch, it was a total emergency. The technician quickly resolved the heating issue.”
Khim Bhattarai
Long Island, NY · Jan 2026
“I hired them to fix my heat as it stopped working. They were quick to diagnose and fix it even during late hours.”
Devendra Bhattarai
Jamaica, NY · Dec 2025
“Heat stopped working in my Jamaica, NY home and these guys came out fast. They explained what was wrong, fixed it the same visit, and were very reasonable.”
Here's where Navien boilers tend to fit best across Long Island.
Navien's combi units eliminate the need for a separate water heater—perfect for the compact basements in 1950s developments.
Navien's 95% efficiency at mid-range pricing delivers the best ROI for moderately-sized suburban homes.
Installer Note: These are general guidelines based on our Nassau County experience. Every home is unique—we'll assess your specific heating needs during our free consultation.
See how Navien compares to other top boiler brands we install in Nassau County.
| Feature |
Current
|
 #1 |
 #4 |
C #8 |
|---|---|---|---|---|
|
Expert Rating
|
4.75/5
|
4.9/5
|
4.65/5
|
4.55/5
|
|
Max Efficiency
|
95%
|
95%
|
96%
|
87%
|
|
Starting Price
|
$3,500+
|
$4,500+
|
$3,800+
|
$2,500+
|
|
Heat Exchanger Warranty
|
10 years combi; heating-only varies by series
|
Lifetime (cast iron)
|
10 years, model-specific limited coverage
|
20 years
|
| Best For | Combi Boilers & Compact Spaces | Steam & Cast Iron Reliability | Reliable condensing boiler options across residential applications | Budget-Friendly Cast Iron |
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Combi Boilers & Compact Spaces
Navien strikes an excellent balance between price and performance. With 95% AFUE efficiency and a 10 years combi; heating-only varies by series heat exchanger warranty, it's a smart choice for most Nassau County homes.
Our Rating
4.75/5
Max Efficiency
95% AFUE
Heat Exchanger
10 years combi; heating-only varies by series
Price Range
$3,500-$8,000
— Blake Ruwali, Home+ Air & Heat
Get answers to the most common questions about Navien boilers for Long Island homes.
Comprehensive guides for boiler installation, repair, and maintenance
Navien makes these boiler types. Explore our full recommendations:
Free estimate from Nassau County's boiler experts
Installed Price Range:
$3,500 – $8,000
*Includes equipment, labor, and permits
A great boiler installer on Long Island will outperform a premium unit installed poorly. Use the verification checklist and three-estimate worksheet before you sign anything.
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