Navien
Lochinvar
Navien vs Lochinvar
Expert head-to-head boiler comparison by Nassau County installers with 35+ years of combined experience.
Head-to-Head Scorecard
Navien
1 win
Lochinvar
0 wins
Navien leads overall
Performance Score Rings
Navien
mid-rangeTop Strengths
- Two current combi families
- 95% AFUE researched residential families
- Heating-only alternatives
Watch Out For
- No steam boiler in researched lineup
- Combi must meet heating and hot-water loads
Lochinvar
premiumTop Strengths
- Commercial-grade engineering
- 96% AFUE efficiency
- Stainless steel fire-tube design
Watch Out For
- Premium commercial-tier pricing
- Larger footprint than residential units
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Expert Verdict
Navien wins for combi boilers and tight mechanical rooms; Lochinvar wins for larger homes and light-commercial work. Both are excellent condensing choices for Long Island.
Pick Navien when…
You want a wall-hung combi unit that handles heat and hot water in one appliance, with WiFi control and top-tier efficiency.
Full Navien reviewPick Lochinvar when…
You have a larger home or want a dedicated boiler with a wider BTU range and a strong commercial-grade product line behind it.
Full Lochinvar reviewCategory-by-Category Breakdown
Click any category to see why one brand wins.
Full Specification Comparison
| Spec | Navien | Lochinvar |
|---|---|---|
| Overall Rating |
4.75/5
|
4.6/5
|
| Price Range (Installed) |
$3.5k – $8.0k
|
$5.5k – $13.0k
|
| AFUE Range |
95–95%
|
95–96%
|
| Parts Warranty |
5 years on researched current residential series
|
5 years
|
| Heat Exchanger Warranty |
10 years combi; heating-only varies by series
|
15 years
|
| Founded |
1978
|
1939
|
| Country |
South Korea
|
USA
|
| Parent Company |
KD Navien
|
Lochinvar LLC
|
Warranty Comparison Timeline
* All warranties shown assume product registration. Unregistered units typically receive 5-year coverage.
Visual Comparison
Pros & Cons
Navien
Strengths
- Two current combi families
- 95% AFUE researched residential families
- Heating-only alternatives
- Published series warranties
Weaknesses
- No steam boiler in researched lineup
- Combi must meet heating and hot-water loads
- Some exchanger terms are prorated
- Check local parts and service
Lochinvar
Strengths
- Commercial-grade engineering
- 96% AFUE efficiency
- Stainless steel fire-tube design
- SMART SYSTEM connectivity
- 12-year heat exchanger warranty
Weaknesses
- Premium commercial-tier pricing
- Larger footprint than residential units
- Requires experienced installers
- May be overkill for smaller homes
Need Help Choosing Between Navien and Lochinvar?
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Long Island Installation Guide
Long Island Installation Guide
Both brands are common in Nassau County oil-to-gas conversions. Navien dominates combi installations in smaller homes and apartments; Lochinvar Noble and Knight boilers show up in larger colonials and light-commercial buildings. Parts for both are available through Long Island distributors.
Climate Zone 4A
Coastal Salt Air
PSEG Rebates
Customer Reviews
❓Navien vs Lochinvar FAQ
Is Navien or Lochinvar better for Long Island homes?
Navien wins for combi boilers and tight mechanical rooms; Lochinvar wins for larger homes and light-commercial work. Both are excellent condensing choices for Long Island.
Which is cheaper to install in Nassau County, Navien or Lochinvar?
Navien ranges from $3.5k – $8.0k installed, while Lochinvar ranges from $5.5k – $13.0k installed in Nassau County.
Are Navien and Lochinvar made by the same company?
No. Navien is made by KD Navien, while Lochinvar is made by Lochinvar LLC.
What warranty does Navien offer vs Lochinvar?
Navien offers 5 years on researched current residential series parts warranty and 10 years combi; heating-only varies by series heat exchanger warranty. Lochinvar offers 5 years parts warranty and 15 years heat exchanger warranty.
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