Rheem vs. Lennox: Which Air Conditioner to Choose?

When it comes time to replace your home’s heating and cooling system, you may be overwhelmed with all available choices. Rheem and Lennox are two of the most popular brands available. But which one is right for you?

In this post, we’ll take a look at the pros and cons of each brand so that you can make an informed decision. We’ll also look at an in-depth comparison between the two brands and see how they stack up against each other. Keep reading to find out more about Rheem vs Lennox.

What is Rheem?

Rheem is an American international company that manufactures water heaters and HVAC systems (heating, ventilation and air conditioning ) for residential and commercial applications. The company was founded in 1925 and is headquartered in Atlanta, Georgia.

Brothers Richard and Donald Rheem founded the company in Emeryville, California. They started the business by selling electric water heaters. In the 1930s, they expanded their product line to include gas-fired water heaters and air conditioners.

In 1955, Rheem acquired a controlling interest in Ruud Manufacturing Company, another manufacturer of HVAC equipment. The merger made Rheem the largest manufacturer of water heaters in the United States.

About Rheem HVAC

Rheem is a recognized leader in the manufacturing of quality HVAC systems. The company has provided cutting-edge cooling and heating solutions for over 90 years. Rheem is synonymous with innovation, and they were one of the first companies to introduce ductless mini-split systems to the market.

They have also developed several unique features for their products. An example is the EcoNet Smart Thermostat, which allows users to monitor and control their HVAC system from a mobile device.

While Rheem offers a wide range of different HVAC products, their most popular line is probably their air conditioners. Rheem’s air conditioning units are energy efficient with Seer ratings (Seasonal Energy Efficiency Ratio) of 20. Rheem’s central air conditioners have an Energy Star rating, affirming energy efficiency.

Rheem models also come with advanced cooling and humidity control features. This is thanks to their variable speed compressor, which can adjust its speed to meet the specific cooling needs of your home. The prestige series (RA20) Rheem air conditioner is an excellent example to use in this case.

Rheem air conditioners also come installed with scroll compressors, increasing their energy efficiency levels and cutting down energy bills.

Rheem offers affordable systems by providing several financing options. They also have a solid warranty, with their units being backed by a 10-year parts limited warranty.

Rheem Pros and Cons

Like any other company, Rheem has its pros and cons. Here are some things to consider if you’re thinking about using their products:


  • Reputable brand: Rheem has been in business since 1925. This longevity means they have a lot of experience making high-quality products that last. This makes it easier for customers to trust Rheem products.
  • A wide range of options: Rheem offers a wide range of HVAC products, so you’re sure to find something that meets your needs.
  • Innovative technology: Rheem is always looking for ways to improve its products and stay ahead of the competition. Their cutting-edge technology ensures that you’re getting the best possible product.
  • Durability: Rheem manufactures its units to withstand even the harshest conditions. This means you can count on their products to last for many years, even with heavy use.
  • Affordable systems: Rheem offers suitable payment plans to help make their products more affordable.


  • High price point: Rheem’s products are generally more expensive than those of other brands. Rheem uses high-quality materials and innovative technology, which comes at a cost.
  • Unavailable in most areas: Rheem products are not available in all areas. This may be because they’re a smaller company than some competitors.
  • Quality control issues: In some cases, Rheem products have not lived up to customers’ expectations. There have been reported cases of frequent coil leaks and expansion valve failures from their new ac units.
  • Lack of support from manufacturers and suppliers: Rheem has been known to be unresponsive to customer complaints. There have also been reports of long wait times for replacement parts.

What is Lennox?

Lennox is an American multinational corporation that produces climate control products such as furnaces, air conditioners, and heat pumps. Lennox Industries was founded in 1895 by Dave Lennox and is headquartered in Richardson, Texas, United States.

The company boast success in the HVAC industry with its Lennox Climate Control products and systems distributed through a network of more than 6,000 authorized dealers across North America.

Lennox provides innovative solutions to home and business owners looking for ways to improve indoor air quality, heating and cooling efficiency, and overall comfort.

What to know about Lennox HVAC

Lennox is another leading manufacturer of quality HVAC systems. The company has been in business for over 100 years. Its products are used in homes and businesses all over the world.

Just like Rheem, Lennox is a company that is synonymous with innovation. They were one of the first companies to develop variable speed blowers, and they were also one of the first to introduce ductless mini-split systems.

Lennox units also come with a smart thermostat and the climax IQ technology, allowing the system to adapt and improve cooling and heating efficiency constantly. The Dave Lennox Signature Collection XC21 air conditioner is a perfect example of a Lennox air conditioner with such features.

Durability and energy efficiency are two of the most important factors to consider when purchasing an HVAC system. Lennox systems are some of the most durable units, with a lifetime of up to 15 years.

Lennox air conditioners are some of the most energy-efficient on the HVAC market and are Energy Star rated. This allows you to save on your monthly utility and energy bills. Their products boast SEER ratings (Seasonal Energy Efficiency Ratio) of up to 28.

In addition, Lennox gas furnaces and heat pump units boast an AFUE (Annual Fuel Utilization Efficiency) rating as high as 98.7%, unlike Rheem gas furnaces.

Lennox models are on the higher end of the spectrum in terms of price. But, as with anything, you get what you pay for, and their products are built to last. Lennox is a brand worth considering if you’re in the market for a new HVAC system.

Pros and Cons of Lennox Brand

Despite Lennox being a leading HVAC brand, there are some pros and cons that customers should be aware of before purchasing.


  • Energy efficiency: As mentioned before, Lennox is one of the most energy-efficient brands available. This means that you’ll save money on your utility bills in the long run.
  • Good selection of features: With Lennox, you can choose from various features such as different fan speeds, humidifiers, and air purifiers. This allows you to customize your heating and cooling experience to your specific needs.
  • Quiet operation: Many Lennox units are designed for quiet operation, so you won’t have to worry about them being too loud.
  • Durability: Lennox systems are built with high-quality materials and are designed to last for many years.


  • Higher upfront cost: Lennox systems often come with a higher price tag than other brands. However, they typically offer better energy efficiency and features so that you may save money in the long run.
  • Poor customer service: Some customers have complained about Lennox’s customer service being unhelpful or difficult to reach. Additionally, Lennox doesn’t have as many contractor options as some other brands, so it may be difficult to find someone to install your system.
  • Requires huge space: Lennox air conditioning systems are bulky, so they may not be a good option if you have limited space.

Rheem Vs Lennox Air conditioner Comparison

To better understand these two companies, we will be pitting them against each other in different categories. This way, you can see which one offers what you are looking for and decide accordingly.

1. Price and Cost

The initial purchasing, installation, and operational cost of a unit is a key determinant of whether a system is worth it. Both Lennox and Rheem do not share their pricing information online and require you to get in touch with a contractor for an estimate.

However, from the quotes we received from most customers, Lennox is generally more expensive than Rheem. Rheem central air conditioner is priced at around $3,000 when installed, while Lennox central units start at about $3,500 to $5000.

As for operational cost, both companies’ systems have energy efficiency levels (EER) and seasonal energy efficiency ratios (SEER) that meet or exceed federal standards.

Lennox has an AC with up to 28 SEER, while Rheem offers up to 20 SEER units in terms of exact numbers. This makes Lennox slightly more energy-efficient, lowering the operational cost.

2. Performance

The cooling power is an important metric when measuring performance. Rheem offers units with cooling capacities of 24,000 to 60,000 BTUs, while Lennox’s units go up to 65,000 BTUs.

This makes Lennox’s units better equipped to handle larger spaces, but both companies offer products that can cool rooms of up to 2,000 square feet.

3. Models

Both companies offer a variety of models with different features to choose from. However, one notable difference is that Lennox offers its various models in three distinct lines.

The three distinct lines are; The Lennox signature line, Elite Series, and Merit Line. Each line offers a different set of features, with the Signature line being the most feature-rich and expensive.

On the other hand, Rheem has seven models presented in three series. The entry-level series is the basic series and has units with a seer rating of up to 13. The classic series is the mid-level series with units having a seer rating of 16.

The units here also have two-stage compressors. Unlike the single-stage units, two-stage compressors help minimize temperature swings and improve moisture removal. The Prestige series is a high-end series with units with seer ratings of up to 20 and features two-stage compressors.

4. Warranties

Warranties are important as they protect you if your unit breaks down and needs repairs or replacement. Both companies offer good warranties on their products. Like Trane air conditioners, Rheem offers better warranties than the Lennox brand, with a 10-year warranty on all parts.

On the other hand, Lennox offers a five-year warranty on the unit’s compressor. However, you can purchase a 10-year extended warranty on the parts.

5. Energy Efficiency

Seasonal Energy Efficiency Ratio (SEER) is used to rate the efficiency of air conditioners. The higher the SEER rating, the more efficient the unit is. This also allows you to save more on utility bills.

Rheem units have a SEER rating of up to 20, while Lennox units have a SEER rating of 28. This makes Lennox ac units more energy-efficient than Rheem units.

6. Noise Levels

Noise levels are an important consideration when choosing an AC unit, as you do not want a unit that will be too loud and disrupt your peace.

Lennox ac units are considered some of the quietest in the market, with noise levels as low as 59 decibels. On the other hand, Rheem units have up to 72 decibels noise levels.

7. Installation

Installation is an important consideration when purchasing an AC unit. Both companies offer professional installation services, but they also have different policies.

Lennox requires that you use a Lennox dealer for installation, while Rheem does not have such a requirement. This gives you more flexibility for installation as you can choose any qualified installer.

Lennox units are bulky and require a larger working space for installation. Rheem units are smaller and can be installed in tight spaces.

8. Temperature Control

Temperature control is an important consideration when choosing an AC unit. You want a unit that can maintain a consistent temperature in your home without fluctuating too much.

Lennox units are equipped with technology, allowing them to maintain a consistent temperature in your home. Rheem units also have this feature, but it is not as advanced as the one used by Lennox.

9. Tax Breaks and Incentives

When purchasing an AC unit, it is important to consider the tax breaks and available incentives. Both Lennox and Rheem brands offer a federal tax credit of up to $300 for certain models. This allows you to save money on your purchase.


Both brands offer high-quality AC units. However, Lennox units are more energy-efficient and have a higher SEER rating. Additionally, they are quieter and offer better temperature control.

Rheem units are more affordable and have shorter lead times for delivery. They are also easier to install as smaller and can be installed in tight spaces. Nevertheless, it is important to consider your needs and budget to decide which brand is right for your new ac unit.