Neither brand is universally "better," but they cater to different needs. Lennox is the premium choice for maximum efficiency, quiet operation, and advanced technology, while Rheem provides better overall value, easier repairs, and strong long-term reliability.
Quick Comparison: Rheem vs. Lennox. While both brands are reliable, Lennox focuses more on cutting-edge efficiency and quieter operation, while Rheem prioritizes value and ease of service.
When choosing a furnace, the best brand depends on what you prioritize: reliability, high-end efficiency, or budget-friendly value. Based on industry consensus and consumer ratings, the top three furnace brands are Carrier, Trane, and Lennox.
Below, we break down Lennox furnace costs based on furnace size, SEER rating, unit type, and labor fees. Homeowners can expect to pay between $3,200 and $8,000+, or $5,600 on average for a Lennox furnace, depending on the model.
HVAC Energy Efficiency
Even when compared to other top-of-the-line options, like Carrier, Lennox comes out on top. This leads to energy savings which leads to budget savings. Though other HVAC systems may be cheaper, the long-term energy savings provided by Lennox help make up the difference.
Lennox purchases parts from the United States, and globally, including our iComfort thermostats manufactured in China which are designed by Lennox as an integral component of our complete HVAC systems (i.e. furnaces, air conditioners and heat pump systems).
A Lennox furnace typically lasts 15 to 20 years. With premium, high-efficiency models and rigorous, routine maintenance, they can sometimes reach 20 to 25 years.
For example, the Lennox SLP98V Variable-Capacity Gas Furnace is at least 50 percent quieter than competitor's furnaces, making the SLP98V gas furnace the quietest furnace you can buy1. SilentComfort™ is achieved by utilizing variable-speed technology.
Lennox® furnaces are some of the most efficient and quietest heating systems you can buy*. They're engineered for perfect warmth and savings.
The best time to buy a furnace is during the off-season, specifically late spring (April-May) or early autumn (September-October), when HVAC companies are less busy and offer lower prices, rebates, or promotions. Purchasing in these shoulder seasons ensures faster installation times and better negotiating power compared to winter peak season.
ENERGY STAR certified oil furnaces that use certain fuels are eligible. The equipment must be rated by the manufacturer for use with fuel blends at least 20 percent of the volume of which consists of biodiesel, renewable diesel, or second-generation biofuel.
Rheem furnaces are widely praised for their exceptional value, high energy efficiency (up to 98% AFUE), and technician-friendly design. However, as with any HVAC brand, consumer satisfaction heavily depends on proper installation and routine maintenance.
Forbes Ranks Rheem the No. 1 Air Conditioning Brand. Quiet operation, price and excellent customer service earned Rheem top marks as the number 1 air conditioning brand.
Lennox is known for pushing efficiency boundaries, offering some of the highest SEER2 and AFUE ratings available. Carrier also delivers high-efficiency systems, especially in its Infinity line. Higher efficiency models cost more upfront but can reduce monthly energy bills and improve indoor comfort.
A Rheem furnace typically lasts between 15 and 20 years. With strict annual maintenance and expert installation, many units can operate efficiently for up to 20 or even 25 years.
The average Lennox furnace cost installed ranges from $3,200 to $10,000, depending on the furnace series, home size, and installation complexity.
Yes, many Lennox HVAC (heating, ventilation, and air conditioning) products are proudly assembled in the United States. However, the company operates an international supply chain and manufactures various units across North America.
The "best" furnace depends on your climate, budget, and long-term priorities. Overall, Trane and Carrier are top-tier leaders, Lennox provides unmatched energy efficiency, and Goodman/Amana offer the best value and warranties.
Rheem specializes in dependable, quiet, efficient systems that make your home comfortable.
The $5,000 rule is a guideline to help homeowners decide whether to repair or replace their HVAC system. You multiply the age of your unit by the cost of the needed repair. If that number exceeds $5,000, replacing your HVAC system is often more cost-effective.
Electric furnaces generally have the longest lifespan, lasting 20 to 30 years due to fewer moving parts and no combustion. However, if you are looking for a standard forced-air system, gas furnaces typically last 15 to 20 years.
Have HVAC Prices Gone Up in 2026? Yes HVAC prices have steadily increased over the past few years, and 2026 is no exception. These increases are affecting everything from entry-level systems to high-efficiency units, making it more expensive than ever to install or replace HVAC systems.
Yes, you should strongly consider replacing a 25-year-old furnace. While it has outlived the typical 15 to 20-year lifespan, at this age, parts fail frequently, efficiency drops dramatically, and there is an increased risk of carbon monoxide leaks.
The heat exchanger is often considered the most costly part of a furnace to repair or replace. It is a critical component that transfers heat from the combustion process to the air that circulates throughout your home. Over time, heat exchangers can crack due to the constant heating and cooling cycles they undergo.