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Lennox AC Vs. Rheem: Which Is Better?

Lennox AC Vs. Rheem: Which Is Better?

Selecting the right air conditioning unit for your home is a significant decision that can impact your family’s comfort for years to come. Two prominent brands in the market, Rheem and Lennox, offer top-quality products, making it challenging to determine which one is the better choice. To help you make an informed decision, we have conducted extensive research and analysis to compare these brands in various aspects. By understanding their similarities, differences, and unique features, you can confidently choose the ideal option for your needs.

Comparing Lennox And Rheem Air Conditioners

Lennox and Rheem are renowned brands in the HVAC industry, and both have earned a solid reputation for manufacturing reliable, high-quality air conditioning units. To determine the best option, we will examine their energy efficiency, features, performance, longevity, maintenance requirements, and purchase prices.

Energy Efficiency

When evaluating air conditioning units, energy efficiency is a crucial factor. It directly impacts your electricity bills and carbon footprint. The Seasonal Energy Efficiency Ratio (SEER) rating measures an AC unit’s energy efficiency, with higher ratings indicating better performance.

Lennox High-Efficiency Models

Lennox excels in energy efficiency, offering advanced models that outperform many competitors. Their top model boasts an impressive SEER rating of 26, while the average SEER rating for their other models is 17. Lennox provides the most energy-efficient two-stage and single-stage air conditioners on the market, such as the Elite Series Lennox XC20 with a SEER rating of 20 and the Lennox SL18XC1 with a SEER rating of 18.5.

Lennox AC Vs. Rheem: Which Is Better?

Rheem High-Efficiency Models

Rheem also offers energy-efficient models and has Energy Star-certified AC units, indicating compliance with high energy efficiency and low carbon emission standards. The Prestige Series RA20 stands out with a SEER rating of 20, while other Rheem models range from 13 to 17 in terms of SEER ratings.

Winner: Lennox


Both Lennox and Rheem provide high-quality features to enhance cooling performance and improve indoor air quality. Key features offered by both brands include:

Lennox AC Vs. Rheem: Which Is Better?
  1. Humidity Control
    Rheem and Lennox offer exceptional humidity control capabilities. Rheem utilizes monitoring software and variable speed compressors to eliminate excess moisture from the air. Lennox incorporates Climate IQ technology specifically designed for humidity control.
  2. Smart Thermostat
    Both brands offer smart thermostat options that allow you to monitor and control temperature settings conveniently using your devices. Rheem provides the EcoNet Smart Thermostat, while Lennox offers the iComfort S30.
  3. Scroll Compressor
    Lennox and Rheem utilize scroll compressors in their units, ensuring reliable and energy-efficient operation. These compressors also contribute to reduced noise levels, making them suitable for quieter environments.

Winner: Tie


Performance is a critical aspect when choosing an air conditioner. Both Lennox and Rheem offer models with different types of compressors:

  • Single-stage compressor: Operates at full capacity only.
  • Double-stage compressor: Operates at full capacity and at a reduced capacity (typically 60-70%).
  • Variable-stage compressor: Adapts its capacity to meet cooling demands, resulting in energy savings and enhanced comfort.

Lennox takes the lead in performance with its top variable-stage AC unit, the Lennox XC25. This unit offers 65 speeds, allowing for precise adjustments to match surrounding temperature changes. Rheem’s Prestige RA20 also provides variable speeds for continuous capacity adjustment but offers only five speeds.

Winner: Lennox


The lifespan of an air conditioner is an important consideration. Rheem units typically last around 10-15 years, which is the average lifespan for most AC units. In comparison, Lennox AC units have a slightly longer lifespan. Units from the Dave Lennox Signature Collection can last up to 20 years, while those from the Elite Series have an average lifespan of 18 years.

Lennox is also known for its durable and reliable AC units, with a reputation for requiring fewer major repairs. In contrast, Rheem models have been reported to be more prone to leaks and other issues.

Winner: Lennox


When it comes to maintenance, Lennox units can be more challenging and expensive to repair. Lennox exclusively uses brand-specific parts, making it more difficult to find replacements and increasing the cost of repairs. In contrast, Rheem does not require brand-specific parts, allowing for easier and more affordable repairs. With Rheem, you have the flexibility to choose technicians outside the brand for repairs.

Winner: Rheem

Lennox AC Vs. Rheem: Which Is Better?

Purchase Price

In terms of purchase price, Rheem offers more budget-friendly options compared to Lennox. Rheem units have a price range of $948 to $1,925 (unit only), while Lennox units are priced between $3,420 and $5,580 (unit only). It’s important to note that installation costs and other factors may influence the total cost, which can vary depending on your location and specific requirements.

Winner: Rheem


Both Lennox and Rheem offer excellent options for cooling systems. If energy efficiency, longevity, and advanced features are your top priorities, Lennox is the preferable choice. However, if you are looking for more affordable options, easier maintenance, and a wide range of models with great features, Rheem is an excellent choice that fits within budget constraints.

Ultimately, your decision should be based on careful consideration of cost, features, energy efficiency, and expert and consumer reviews. Since an air conditioner is a significant investment, taking the time to thoroughly compare options will ensure you make the right choice for your home.

Lennox AC Vs. Rheem: Which Is Better?

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Written by HVAC Contributor

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