Best Air Conditioners for Florida
Top Air Conditioner Brands for Florida Florida’s climate can be challenging, with hot summers and high humidity levels. Selecting the right air conditioner for your Florida home is crucial not...
The Lennox SL28XCV is one of the most efficient central air conditioners on the market, with a SEER rating of up to 28 and a variable-speed compressor that keeps your home cool without the temperature swings or noise of a standard unit. But at $5,000 to $7,500 installed, it’s also a significant investment. This review breaks down what you get, who it’s best for, and whether the long-term energy savings justify the upfront cost.
| Spec | Detail |
|---|---|
| SEER Rating | Up to 28 |
| Compressor Type | Variable-speed |
| Sound Level | As low as 56 dB |
| Humidity Reduction | Up to 30% more than standard units |
| Coil Technology | Lennox Quantum™ Coil (aluminum alloy) |
| Certifications | ENERGY STAR® Most Efficient |
| Installed Cost Range | $5,000 to $7,500 |
| Best For | Hot, humid climates; noise-sensitive spaces; long-term energy savings |
Unlike single-speed or two-stage compressors that cycle fully on and off, the SL28XCV’s variable-speed compressor adjusts its output in small increments, running longer at lower capacity rather than blasting at full power and shutting down. The result is more consistent temperatures, lower energy consumption, and significantly less wear on the system over time.
At as low as 56 decibels, the SL28XCV is one of the quietest central air conditioners available. For comparison, a typical conversation runs around 60 dB. This makes it a strong choice for bedrooms, home offices, and any space where AC noise is a quality-of-life issue.
The variable-speed operation gives the SL28XCV more time to pull moisture out of the air on each cycle. The result is up to 30% better humidity removal than standard single-speed units — a meaningful comfort upgrade for homeowners in the Gulf Coast, Southeast, or any consistently humid region.
The SL28XCV uses Lennox’s proprietary aluminum alloy coil technology, engineered for durability and corrosion resistance. This extends the AC unit’s lifespan compared to conventional copper coil systems and reduces the likelihood of refrigerant leaks over time.
The SL28XCV holds ENERGY STAR® Most Efficient status, placing it in the top tier of certified air conditioners for energy performance. State and local utility rebate programs often prioritize ENERGY STAR® Most Efficient products for the highest rebate tiers. See available HVAC rebates in your area.
Installed cost for the Lennox SL28XCV typically runs between $5,000 and $7,500, depending on your home size, location, and whether any ductwork modifications are needed. This is higher than the national average for central AC installation, which falls closer to $3,500 to $5,500 for a standard unit.
The premium is real, but so is the energy offset. At a SEER of 28 versus the 14 to 16 SEER of a baseline unit, the SL28XCV can cut cooling energy consumption by 40% or more depending on your current system. For homeowners in hot climates running their AC heavily from May through September, that difference adds up quickly on monthly utility bills.
Read our full Lennox AC review here.
The SL28XCV is not the right unit for every homeowner, but it is an excellent fit for specific situations:
The SL28XCV may not be the best fit if you are replacing an AC on a tight timeline or budget, live in a mild climate with low annual cooling hours, or are planning to sell your home in the near term.
The SL28XCV requires installation by a licensed HVAC technician. This is not a unit to cut corners on. The variable-speed compressor and integrated controls need to be properly calibrated to operate at rated efficiency, and incorrect installation can void the warranty.
Day-to-day maintenance is straightforward: change your air filter every one to three months and schedule an annual professional tune-up. Most HVAC contractors offer service plans that cover annual inspections and priority scheduling.
“The SL28XCV is perfect for our home. It’s incredibly quiet, and we’ve seen a noticeable decrease in our energy bills. We’re thrilled with the performance!” — Homeowner in Scottsdale, AZ
“I was hesitant about the investment at first, but it has been worth every penny. It cools our home evenly and runs quietly — no more noisy air conditioner hums!” — Homeowner in Tampa, FL
| Lennox SL28XCV | Standard 16 SEER Unit | Premium Competitor (Trane XV21) | |
|---|---|---|---|
| SEER Rating | Up to 28 | 14-16 | Up to 22 |
| Compressor | Variable-speed | Single-speed | Variable-speed |
| Sound Level | 56 dB | 72-78 dB | 57-58 dB |
| Humidity Control | Superior | Standard | Superior |
| Installed Cost | $5,000-$7,500 | $3,500-$5,500 | $4,500-$7,000 |
| ENERGY STAR® Most Efficient | Yes | No | Yes |
The Lennox SL28XCV earns its reputation as one of the best central air conditioners available. The SEER-28 efficiency rating, near-silent operation, and superior humidity control set it apart from both standard units and most of its premium competitors. For homeowners in hot, humid climates who plan to stay in their home for the long term, it is difficult to find a better-performing residential AC system at this price point.
The higher upfront cost is the only meaningful drawback, and for the right buyer in the right climate, the long-term energy savings and improved comfort make it a straightforward recommendation.
The Lennox SL28XCV has a maximum SEER rating of 28, making it one of the highest-efficiency central air conditioners available for residential use.
The SL28XCV operates at as low as 56 decibels — quieter than a normal conversation and significantly quieter than most standard central AC units, which run between 72 and 78 dB.
For homeowners in warm climates who run their air conditioning heavily, the energy savings over 5 to 10 years can offset the higher upfront cost. State and local utility rebates may help reduce the initial investment depending on your location.
The federal Section 25C Energy Efficient Home Improvement Credit was eliminated at the end of 2025 under the One Big Beautiful Bill Act, so new installations in 2026 no longer qualify for federal tax credits. However, many state and local utility programs still offer rebates on high-efficiency equipment like the SL28XCV. Check available HVAC rebates in your area.
The SL28XCV comes with a 10-year limited warranty on the compressor and covered parts when registered within 60 days of installation. Labor warranty terms vary by dealer.
The SL28XCV is available in multiple tonnage configurations to suit a range of home sizes. A licensed HVAC technician can perform a load calculation to determine the correct size for your home — an important step that affects both performance and efficiency.
