Lennox Furnace Review
Expert Review & Analysis
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Our Review Process
Our reviews are fact-checked by NATE-certified HVAC professionals with 10+ years of field experience.
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Why We Love Lennox
Lennox has earned its reputation as one of the premier furnace manufacturers. Here's why our NATE-certified technicians recommend Lennox to homeowners looking for the best in home heating.
Lifetime Warranty
Lifetime heat exchanger warranty provides unmatched peace of mind.
Industry-Leading Efficiency
Up to 99% AFUE means more savings every heating season.
131+ Years of Excellence
A legacy of manufacturing excellence and continuous innovation.
Premium Build Quality
Attention to every detail, from heat exchanger to cabinet construction.
Lennox Specifications & Scores
Detailed analysis based on our expert evaluation
Performance Scores
Key Specifications
Who Is It For?
- Quality-focused homeowners
- Long-term residents
- Energy efficiency prioritizers
- Tight-budget buyers
- Short-term homeowners
Expert Review
Updated December 2024"The built-in carbon monoxide detection on select models eliminates the need for separate detectors near the unit"
— Home+ Air HVAC Expert Assessment
Lennox has built its reputation on engineering the most efficient furnaces money can buy. Their SLP99V model holds the distinction of being the only gas furnace on the market with a 99% AFUE rating—literally extracting every possible BTU from the fuel consumed. In Nassau County, we primarily install Lennox in larger homes throughout Manhasset, Great Neck, and Old Westbury where energy savings compound significantly over time.
The precision-engineered variable-capacity technology operates at exactly the level needed—no more, no less. This translates to exceptionally even temperatures throughout multi-story homes, eliminating the hot and cold spots common in Long Island Colonials and split-levels. The SilentComfort technology operates at just 37 decibels, making it the quietest furnace we install.
What makes Lennox special for Nassau County homes is their sealed combustion design combined with stainless steel secondary heat exchangers. Given our coastal humidity and salt air within 10 miles of the shore, this corrosion resistance extends equipment life significantly. The iComfort S30 thermostat integration provides geofencing, weather-adaptive adjustments, and remote diagnostics.
Parts availability through Lennox Premier Dealers and F.W. Webb is reliable for common components, though specialty parts for the SLP99V occasionally require 2-3 day shipping. The 20-year heat exchanger warranty reflects their confidence in build quality. All high-efficiency models qualify for maximum PSEG Long Island rebates and federal energy tax credits.
Installation notes for Long Island: The compact footprint of the SL-series fits perfectly in the tight mechanical closets common in Great Neck and Roslyn homes. The built-in carbon monoxide detection on select models eliminates the need for separate detectors near the unit.
Our bottom line: Lennox is worth the premium for homeowners who prioritize maximum efficiency and whisper-quiet operation. The SLP99V pays for itself over 15+ years in fuel savings, particularly for homes with high heating demands (3,000+ sq ft or poor insulation). If efficiency is your top priority and budget allows, Lennox is unmatched.
Our Bottom Line
Lennox is worth the investment for homeowners who prioritize quality, efficiency, and long-term reliability. The higher upfront cost is offset by energy savings and exceptional warranty coverage.
Home+ Air HVAC Team
NATE-Certified HVAC Professionals • Nassau County Experts
Pros
- Highest AFUE ratings in the industry—SLP99V achieves 99%
- SilentComfort technology for whisper-quiet operation (37 dB)
- Precise Comfort technology for optimal humidity control
- Built-in carbon monoxide detection on select models
- iComfort S30 smart thermostat with geofencing
- Stainless steel heat exchangers resist coastal corrosion
- 20-year heat exchanger warranty demonstrates confidence
- Best efficiency ROI for high-heating-demand homes
Cons
- Highest-priced furnaces on the market
- Specialty repairs require Lennox-trained technicians
- Some proprietary parts may require 2-3 day shipping
- iComfort smart features require Lennox thermostat
- Fewer dealers than Carrier or Trane in Nassau County
Top Lennox Models
Our recommended Lennox furnaces for Nassau County homeowners.
The industrys most efficient gas furnace with Precise Comfort technology and built-in carbon monoxide detection
Best for: Energy-conscious homeowners wanting maximum efficiency
$7,000 - $9,000installed
View Full DetailsTop Lennox Furnace Models
These are the most popular and highly-rated Lennox furnace models we recommend based on our installation experience in Nassau County.
Model: SLP99V
Estimated Price (Installed)
$7,000 - $9,000
The industrys most efficient gas furnace with Precise Comfort technology and built-in carbon monoxide detection
Best For
Energy-conscious homeowners wanting maximum efficiency
Model: SL297NV
Estimated Price (Installed)
$6,500 - $9,000
The Lennox SL297NV features 97% AFUE efficiency with variable-capacity modulation for the ultimate in comfort and efficiency, operating as quietly as 37 decibels.
Best For
Luxury homeowners wanting whisper-quiet operation
Model: EL296V
Estimated Price (Installed)
$4,500 - $6,500
The Lennox EL296V delivers 96% AFUE efficiency with two-stage heating and variable-speed blower, offering excellent comfort at a more accessible price.
Best For
Homeowners seeking Lennox quality at mid-tier pricing
Note: Prices shown are estimates for typical Nassau County installations and may vary based on your home's specific requirements, ductwork condition, and any necessary modifications. Contact us for a precise quote.
How Much Does a Lennox Furnace Cost?
Lennox furnaces range from $3.8k - $9.0k installed. Here's a detailed breakdown by system tier and home size.
Lennox Cost by System Tier
| Tier | Price Range | Efficiency | Features |
|---|---|---|---|
| Entry-Level | $3,800 - $4,940 | 80% AFUE | Single-stage, basic |
| Mid-Tier | $5,760 - $7,040 | 90% AFUE | Two-stage, improved |
| Premium | $7,650 - $9,000 | 99% AFUE | Modulating, variable-speed |
Lennox Cost by Home Size
| Home Size | Price Range | Typical BTU |
|---|---|---|
| Small (1,000 sq ft) | $3,800 - $5,760 | 40,000 - 60,000 BTU |
| Medium (1,500 sq ft) | $5,440 - $7,650 | 60,000 - 80,000 BTU |
| Large (2,000+ sq ft) | $6,400 - $9,000 | 80,000 - 120,000 BTU |
Factors That Affect Your Final Price
- Home size and existing ductwork condition
- Installation complexity and accessibility
- Local labor rates in your area
- Permits and inspection requirements
- Removal of old equipment
- Thermostat and zoning upgrades
Get an Exact Quote for Your Home
We offer financing options as low as 0% APR for qualified buyers.
Customer Reviews
See what Nassau County homeowners are saying about their Lennox furnaces.
"We upgraded to a Lennox furnace last winter and couldn't be happier. The even heating throughout our home is remarkable—no more cold spots in the bedrooms."
Michael T.
Garden City, NY
"The Lennox runs so quietly we sometimes forget it's on. Definitely worth the investment for the comfort level."
Sarah K.
Westbury, NY
What Customers Love Most
Reviews are from verified customers in our service area. Individual experiences may vary.
Where Lennox Fits Best in Nassau County
Based on 500+ furnace installations, here's where Lennox furnaces perform best across Long Island.
Maximum efficiency in luxury homes
Lennox's 99% AFUE efficiency and variable-speed technology match the investment-grade expectations of North Shore estates.
Even heating across floors
Lennox's modulating technology eliminates hot/cold spots common in multi-story homes—critical for Long Island's variable winter weather.
Whisper-quiet operation
Lennox's insulated cabinet and variable-speed blower run quietly—perfect for homes where the furnace is near bedrooms or living spaces.
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.
Recent Lennox Installation in Nassau County
Real installation from our service area. Details anonymized for privacy.
Property
System Installed
Result: Customer reported 28% reduction in winter heating bills—over $400 annual savings
Installation completed by our NATE-certified team. Individual results vary based on home and usage patterns.
Lennox Warranty Coverage
Complete breakdown of Lennox's warranty protection for your investment.
Parts Warranty
10 years
Heat Exchanger
Lifetime (limited)
Labor Warranty
1 year (extended available)
Extended Option
Up to 10 years comprehensive
Important Warranty Tips
- Register your furnace within 60 days of installation to activate full warranty coverage
- Keep all maintenance records - regular professional maintenance is often required for warranty validity
- Extended warranties may be available through your installer for additional peace of mind
- Heat exchanger warranties typically require proof of annual maintenance
Not Sure Which Furnace Brand Is Right for You?
Answer a few quick questions about your home and preferences, and we'll recommend the best furnace brands for your specific needs.
- Get personalized brand recommendations
- See estimated costs for your home
- Compare efficiency savings
- No commitment required
Lennox vs Competitors
See how Lennox compares to other premium tier furnace brands.
| Feature | |  |  |
|---|---|---|---|
| Rating | 4.85 | 4.9 | 4.75 |
| Max AFUE | 99% | 97.3% | 97% |
| Starting Price | $3,800 | $3,400 | $2,700 |
| Heat Exchanger Warranty | Lifetime (limited) | Lifetime (limited) | Lifetime (limited) |
| Parts Warranty | 10 years | 10 years | 10 years |
Competitor Deep Dive
Trane
$3.4k - $8.2k • 97.3% AFUE
Trane Strengths
- Legendary durability—we see 25-30 year lifespans regularly
- Heavy-gauge steel construction outlasts competitors
Trane Weaknesses
- Not quite as efficient as Lennox or Carrier flagship models
- Premium pricing similar to top competitors
Why Choose Lennox Over Trane?
Better efficiency (99% vs 97.3% AFUE)
American Standard
$2.7k - $6.2k • 97% AFUE
American Standard Strengths
- Trane engineering at lower price
- Up to 97% AFUE efficiency
American Standard Weaknesses
- Less brand recognition than Trane
- Slightly smaller dealer network
Why Choose Lennox Over American Standard?
Higher expert rating (4.85 vs 4.75)
Frequently Asked Questions About Lennox Furnaces
Get answers to the most common questions about Lennox furnaces.
Final Verdict: Should You Buy a Lennox Furnace?
Lennox is a premium choice for homeowners who demand the best in efficiency, reliability, and comfort. With up to 99% AFUE efficiency and a Lifetime (limited) heat exchanger warranty, this is an investment that pays dividends in comfort and energy savings.
Key Takeaways
- Rated 4.85/5 by our HVAC experts
- 99% maximum AFUE efficiency
- Lifetime (limited) heat exchanger warranty
- Installed cost: $3.8k - $9.0k
Best For:
Homeowners who prioritize long-term value, maximum efficiency, and are willing to invest in premium quality.
Free estimates • No obligation • NATE-certified technicians
Related Guides
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🏭 Also by Lennox International
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Get a Lennox Quote
Interested in a Lennox furnace? Get a free quote from our NATE-certified team.
Quick Price Estimate
Typical installed prices for Lennox furnaces in Nassau County:
*Estimates based on typical installations. Your actual price may vary.
Our Rating
4.85/5