Best for: Commercial-Grade Residential Performance
Lochinvar specializes in hot water and condensing systems (no steam boilers available).
Yes — Lochinvar boilers are a premium-tier choice. Our editorial score is 4.6/5 based on published efficiency, climate fit, warranty, features, and price positioning. Lochinvar is associated with Lochinvar LLC; 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 Lochinvar comparison starts with the exact indoor and outdoor model pairing—not the brand name alone. Home+ Air & Heat can review Lochinvar 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.
Lochinvar boilers and water heaters are built by Lochinvar, LLC, founded in 1919 and based in Lebanon, Tennessee. Lochinvar has been part of A. O. Smith Corporation since 2011 and manufactures its condensing boilers and commercial water heaters at its Tennessee facility, sold through the professional wholesale channel only.
Brands from the same manufacturer: A. O. Smith, State, American. Equipment sold under sibling labels often shares components and plants, so the installing contractor — not the badge — usually decides how the system performs.
Planning a Lochinvar project on Long Island? See how we install and size it for Nassau & western Suffolk homes →
Lochinvar rates 4.6 out of 5 in our premium-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 commercial-grade residential performance. 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.
Lochinvar has earned its reputation as one of the premier boiler manufacturers. Here's why our installers recommend Lochinvar to homeowners looking for the best in home heating.
Up to 96% AFUE helps reduce your monthly energy bills.
Attention to every detail, from heat exchanger to cabinet construction.
Proudly designed and manufactured in the United States.
Salt-resistant components ideal for Long Island's waterfront communities.
Overall Score
Great For
Not Ideal For
Lochinvar leads the commercial boiler market and brings that industrial-grade engineering to residential applications. Our Trotta installation teams recommend Lochinvar for demanding Nassau County homes requiring maximum hot water capacity and bulletproof reliability.
The Knight and Noble Fire Tube series achieve up to 96% AFUE efficiency with commercial-grade stainless steel fire-tube heat exchangers. Lochinvar's SMART SYSTEM technology provides advanced diagnostics and connectivity that simplify maintenance and troubleshooting.
For larger Long Island homes with significant hot water demands—multiple bathrooms, radiant floors, pool heating—Lochinvar's commercial DNA delivers capacity that residential-focused brands can't match. The fire-tube design handles demanding duty cycles without premature failure.
Local parts availability through commercial HVAC suppliers and Lochinvar's strong distributor network ensures service support. The 12-year heat exchanger warranty on residential models demonstrates manufacturing confidence.
PSEG Long Island rebates apply to qualifying Lochinvar installations. The premium investment pays dividends through exceptional longevity and reduced operating costs over the system lifespan.
For homeowners with high-demand applications seeking commercial-grade durability and performance, Lochinvar brings industrial expertise to residential comfort. The higher upfront cost reflects professional-grade engineering.
— Blake Ruwali, Home+ Air & Heat
Lochinvar models with published specifications.
Commercial-grade condensing boiler bringing industrial reliability to luxury homes.
Best for: Large estates in Old Westbury and Brookville over 5,000 sq ft
$7,000 - $13,000installed
View Full DetailsLochinvar boiler models with published AFUE, boiler type and typical installed price ranges.
Model: WHN
Commercial-grade condensing boiler bringing industrial reliability to luxury homes.
Estimated Installed Price:
$7,000 - $13,000
Best For
Large estates in Old Westbury and Brookville over 5,000 sq ft
Model: NKC
Premium condensing boiler with connected technology and commercial heritage.
Estimated Installed Price:
$6,000 - $10,000
Best For
Large multi-zone colonials needing premium performance
Model: CRN
Entry-level Lochinvar condensing boiler with fire-tube reliability.
Estimated Installed Price:
$5,500 - $9,000
Best For
Homes wanting commercial quality at more accessible pricing
Model: KBN400-801
Knight XL condensing boiler, 96.2% AFUE, 79,900-800,000 BTU/hr range
Estimated Installed Price:
Contact for pricing
Model: KHB055N-285N
Knight Fire Tube condensing boiler, 95.0% AFUE, 11,000-285,000 BTU/hr range
Estimated Installed Price:
Contact for pricing
Model: NKB080N-199N
Noble Combi combi boiler, 95.0% AFUE, 16,000-199,000 BTU/hr range
Estimated Installed Price:
Contact for pricing
*Prices are estimates for Nassau County installations. Actual cost depends on home size, system complexity, and model selection.
Every Lochinvar 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 |
|---|---|---|---|---|---|---|
| Knight WHN | Condensing | — | 96% | 55k–399k | 15 years | — |
| Noble NKC | Condensing | — | 95% | 55k–285k | 15 years | — |
| Crest | Condensing | — | 95% | 55k–199k | 10 years | — |
| Knight XL | Condensing | natural gas/propane | 96.2% | 80k–800k | 12-year limited heat exchanger | Spec sheet |
| Knight Fire Tube | Condensing | natural gas/propane | 95% | 11k–285k | 12-year limited heat exchanger | Spec sheet |
| Noble Combi | Combi | natural gas/propane | 95% | 16k–199k | 12-year limited heat exchanger | Spec sheet |
Estimated installed price: $5,500–$13,000. 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 Lochinvar 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
Covers major components like controls and pumps
Heat Exchanger
15 years
The heart of your boiler—cast iron or stainless steel
Labor Coverage
1 year
Manufacturer coverage for service calls
Extended Options
Available through dealer
Additional protection beyond standard warranty
Installed prices for Lochinvar boilers range from $5,500 to $13,000 in Nassau County. Price varies by model efficiency, home size, and installation complexity.
$5,500 - $7,975
Entry-level models with solid performance
$7,975 - $10,450
Best balance of features and value
$10,450 - $13,000
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 Lochinvar boilers tend to fit best across Long Island.
Lochinvar's 15 years heat exchanger warranty provides peace of mind for long-term residents.
Lochinvar's stainless steel components resist the accelerated corrosion from salt air within a mile of the shore.
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 Lochinvar compares to other top boiler brands we install in Nassau County.
| Feature |
Current
|
 #1 |
 #2 |
 #4 |
|---|---|---|---|---|
|
Expert Rating
|
4.6/5
|
4.9/5
|
4.85/5
|
4.65/5
|
|
Max Efficiency
|
96%
|
95%
|
95%
|
96%
|
|
Starting Price
|
$5,500+
|
$4,500+
|
$4,000+
|
$3,800+
|
|
Heat Exchanger Warranty
|
15 years
|
Lifetime (cast iron)
|
Lifetime (cast iron) / 20 years (stainless)
|
10 years, model-specific limited coverage
|
| Best For | Commercial-Grade Residential Performance | Steam & Cast Iron Reliability | Residential Hot Water Systems | Reliable condensing boiler options across residential applications |
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✓ Insured installers • ✓ Free in-home estimates • ✓ Financing available
Commercial-Grade Residential Performance
Lochinvar is a premium choice for homeowners who prioritize long-term reliability and efficiency over upfront cost. With a 15 years heat exchanger warranty and efficiency up to 96% AFUE, this is a boiler built to last decades.
Our Rating
4.6/5
Max Efficiency
96% AFUE
Heat Exchanger
15 years
Price Range
$5,500-$13,000
— Blake Ruwali, Home+ Air & Heat
Get answers to the most common questions about Lochinvar boilers for Long Island homes.
Comprehensive guides for boiler installation, repair, and maintenance
Lochinvar makes these boiler types. Explore our full recommendations:
Free estimate from Nassau County's boiler experts
Installed Price Range:
$5,500 – $13,000
*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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