| Feature | Lennox | Rheem |
|---|---|---|
| Efficiency (SEER/HSPF) | Up to 28 SEER (high-end model; ~25.8 SEER2); Heat pumps up to ~10.2 HSPF | Up to 20 SEER (~20.5 SEER2); Heat pumps up to ~11.5 HSPF |
| Price Range (installed) | $$$$ (Premium pricing; approx. $6,100–$24,500 for full system) | $$ (Moderate pricing; approx. $5,600–$16,100 for full system) |
| Noise Level (Outdoor Unit) | Quiet operation; as low as ~59 dB on top models (near a normal conversation) | Low-noise design; ~58 dB at best (side-discharge unit) and around 71 dB on standard high-end units (street noise level) |
| Smart Features | iComfort® smart thermostats with Wi-Fi; Alexa, Google Assistant, Apple HomeKit integration; advanced system monitoring | EcoNet® smart thermostat with Wi-Fi; Alexa & Google Assistant voice control; optional geofencing & advanced diagnostics |
| Warranty | 5-Year base; 10-Year parts (with registration); 10-Year compressor; 20+ year or lifetime on heat exchanger (furnaces) | 5-Year base; 10-Year parts (with registration); 10-Year compressor; lifetime heat exchanger on select furnaces; some models include unit replacement coverage |
Performance & Energy Efficiency
Lennox excels in high SEER ratings (up to 28 SEER) and heat pumps near 10.5 HSPF, delivering standout energy savings. They even offer solar-assisted systems for maximum efficiency. Rheem reaches about 20 SEER and 11+ HSPF, sufficient for most homes. Lennox’s extra efficiency benefits those in especially hot climates, while Rheem provides strong performance at a more moderate price. Both meet ENERGY STAR® standards, so either brand helps reduce power bills.
Durability & Reliability
Lennox is known for premium components and advanced technology, but past quality control issues have led to occasional mixed feedback. Proper installation is crucial to achieve longevity. Rheem is often praised for solid, time-tested designs and simpler service. Many Rheem units last 15–20+ years with routine upkeep. Overall, Lennox pushes innovation, while Rheem focuses on proven reliability, with fewer reported repair needs.
Noise Level Comparison
Lennox emphasizes ultra-quiet operation; top models can dip to 59 dB, about the volume of normal conversation. Their Signature Series often runs whisper-silent. Rheem has also improved noise control, especially in newer lines, with some side-discharge units reaching 58 dB. Most Rheem units operate in the low-70 dB range, which is still quite manageable. Both brands can offer quieter cooling than older, louder systems.
Cost & Value (Upfront and Long-Term)
Lennox sits at the premium end, with full systems from roughly $6,000 to $24,000+. Their cutting-edge efficiency can lower utility bills significantly, potentially offsetting initial costs. Rheem is more budget-friendly, often in the $5,500–$16,000 range. While not as high on maximum SEER, Rheem provides excellent overall value. Maintenance and part replacements tend to be cheaper and more readily available for Rheem. Both can deliver good returns, but Lennox targets top-tier performance at a premium, while Rheem offers solid efficiency at a moderate price.
Smart Features and Control Options
Lennox uses the iComfort® platform with S30 thermostats, offering Wi-Fi control, advanced diagnostics, geofencing, and compatibility with Alexa, Google Assistant, and Apple HomeKit. Rheem integrates EcoNet® for similar remote access, scheduling, and voice commands with Alexa or Google Assistant. Rheem also supports geofencing and broader third-party thermostat compatibility. Both brands provide modern control systems, so either can fit seamlessly into a connected home.
Installation and Maintenance
Lennox typically requires authorized dealers, especially for its high-tech models. Correct setup is vital to ensure efficiency and minimize repairs. Parts can be more specialized and costly. Rheem is considered installer-friendly; parts are widely available, and design simplicity allows most technicians to service it easily. Both recommend annual check-ups, but Rheem usually leads to less expensive maintenance over time. Lennox’s advanced systems can perform exceptionally well, provided they’re expertly installed and maintained.
Warranty and After-Sales Support
Lennox includes a 5-year base parts warranty, extendable to 10 years with registration. High-end models come with 10-year compressor coverage and long heat exchanger warranties for furnaces. Rheem also provides 5 years base, extended to 10 years for parts and compressors upon registration. Rheem’s coverage is generally uniform, and some models feature unit replacement warranties. Service is often simpler with Rheem due to widespread part availability, but Lennox also offers reliable support through its dealer network.
User Reviews and Market Feedback
Many Lennox owners highlight the quiet, energy-efficient comfort they enjoy, though a few mention higher repair costs or complex technology issues. Rheem owners frequently praise the brand’s steady performance and affordability. Professionals often note Rheem’s ease of service. Both rank highly for homeowner satisfaction, with Lennox edging ahead in comfort and Rheem in long-term reliability. Ultimately, a qualified installer is crucial to ensure either brand meets its potential for comfort and efficiency.
