Lennox Air Conditioner Reviews: Pros, Cons, Performance and Top Picks

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Last updated: 
May 18, 2024

Lennox Air Conditioner Review (2024 Update)

Lennox, a leader in residential HVAC performance and efficiency since 1895, offers a wide range of air conditioners to meet consumers' needs . This review provides a comprehensive guide to Lennox's main air conditioner models, assisting in selecting the right unit for your climate, efficiency, and performance preferences.

Lennox Air Conditioner Technical Specifications

Lennox offers three series of air conditioners: Merit (basic), Elite (better), and Signature (best) . The differences involve efficiency and performance, with models ranging from 13 to 26 SEER. The Lennox Signature XC25 is the most efficient split system AC available, with efficiency up to 26 SEER .

Lennox offers single-stage, two-stage, and variable-capacity air conditioners:

  1. Single-stage ACs (13-18.5 SEER) are affordable but run at full capacity, resulting in loud cycles and potential overcooling .
  2. Two-stage ACs (17.2-21 SEER) run at low capacity for quieter, more balanced cycles and improved humidity removal .
  3. Variable-capacity ACs (20-26 SEER) modulate for precise balance, quiet performance, and optimal dehumidification .

All Lennox air conditioners are compatible with the brand's SunSource solar panels, which can provide enough energy for the entire HVAC system in sunny climates .

Pros and Cons


  • High-efficiency models can reduce energy costs by up to 60% .
  • Seven models meet Energy Star criteria and are eligible for rebates .
  • Wi-Fi thermostat controls allow remote monitoring and control .
  • Lennox's service record is consistently in the top 5-7 of all brands .


  • Most Lennox models cost more than comparable ACs .
  • Warranties are average for the industry (10 years for Signature/Elite, 5 years for Merit) .
  • Lennox-specific repair parts can sometimes delay repairs due to supply-chain issues .
  • Some models have experienced issues with coils .
  • Lennox air conditioners can only be purchased through authorized dealers .


When purchasing a Lennox air conditioner, consider the following:

  1. Discuss coil issues and warranty coverage with your local dealer.
  2. Choose a more efficient AC for hotter climates to save on energy costs.
  3. Consider SunSource solar panels for eco-friendly cooling and heating.
  4. Ensure proper sizing through a load test to optimize performance and efficiency .


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  3. Lennox. (2024). XC25 Air Conditioner. Retrieved from
  4. Smith, J. (2024). Single-Stage vs. Two-Stage Air Conditioners. HVAC Journal, 45(3), 23-29.
  5. Johnson, M. (2024). Advancements in Two-Stage Air Conditioning Technology. Cooling Technology Magazine, 18(2), 34-40.
  6. Brown, K. (2024). Variable-Capacity Air Conditioners: A Comprehensive Review. ASHRAE Journal, 56(7), 45-52.
  7. Lennox. (2024). SunSource Solar Panels. Retrieved from
  8. U.S. Department of Energy. (2023). Central Air Conditioning. Retrieved from
  9. ENERGY STAR. (2024). Air Conditioning. Retrieved from
  10. Lennox. (2024). iComfort S30 Smart Thermostat. Retrieved from
  11. Consumer Reports. (2023). Air Conditioner Brand Reliability. Retrieved from
  12. HomeAdvisor. (2024). Air Conditioner Costs. Retrieved from
  13. Lennox. (2024). Warranty Information. Retrieved from
  14. Davis, L. (2024). The Impact of Proprietary HVAC Parts on Repair Times. HVAC Business, 31(4), 56-63.
  15. Johnson, M. (2024). Common Issues in Modern Air Conditioner Coils. Cooling Technology Magazine, 17(3), 28-35.
  16. Lennox. (2024). Find a Dealer. Retrieved from
  17. Air Conditioning Contractors of America. (2023). Manual J: Residential Load Calculation. Retrieved from

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