SL18XC1​​ Lennox Air Conditioner – Up To 18.5 SEER, Single Stage

Emergency Lennox A/C Repair Service

  • Cooling efficiency ratings of up to 18.5 SEER -Can save hundreds of dollars a year, compared to a standard air conditioner
  • Reliable, single stage scroll compressor – Provides quiet, efficient performance
  • SilentComfort fan motor – Reduces sound and saves energy
SKU: SL18XC1 Categories: ,

This product has been discontinued SEE SUGGESTED REPLACEMENT MODEL BELOW.

SL28XCV​​ Lennox Air Conditioner – Up to 28 SEER, Variable-capacity XC21​​ Lennox Air Conditioner – Up To 21 SEER, Two Stage


Sl18XC1​ Lennox Air Conditioner

Dave Lennox Signature® Collection SL18XC1 air conditioner is the quietest and most efficient single-stage air conditioner. With efficiencies up to 18.5 SEER/15 EER, the SL18XC1 offers quiet, efficient comfort. SL18XC1​​ Lennox Air Conditioner also qualifies for some of the highest utility rebate levels.

  • Cooling efficiency ratings of up to 18.50 SEER – can save hundreds of dollars per year compared to a standard air conditioner
  • Compatibility with iComfort thermostats – customers save energy whether home or away


Cooling Savings

10 SEER VS. 18.5 SEER
Heating and cooling can account for about half of a home’s total utility bill. By upgrading to a high-efficiency system, you can cut your energy costs while keeping your family perfectly comfortable. See how much money could be saving with a SL18XC1​​ Lennox Air Conditioner.

Save per year*
5-year savings 10-year savings 15-year savings
$720 $1,440 $2,160
*based on national average

Home Comfort

Precise performance
The precision scroll compressor inside the SL18XC1 Lennox Air Conditioner keeps the unit operating at peak performance, even through the hottest summers, to deliver a more consistent temperature.

Always at peak efficiency
Since it offers a SEER efficiency rating of up to 18.5, the SL18XC1 can save you hundreds of dollars per year in energy bills, even through the hottest summers.


Perfectly Quiet

As quiet as it is efficient. Quiet Operation – Sound levels—as low as 65 dB. Innovative SilentComfort™ technology combines thick insulation, vibration resistance and a specially shaped fan blade to greatly reduce sound levels. Even when installed outside a bedroom window, the SL18XC1 Lennox Air Conditioner lets you rest peacefully.

  • Sound levels as low as 65 dB – the quietest and most efficient single-stage air conditioner
  • SilentComfort fan motor reduces sound and saves energy


Reliable Peformance

The condenser coil is the part of the air conditioner that draws hot air from inside your home and releases it outside. The Lennox Quantum™ coil handles the heat like no other. It’s constructed from aluminum alloy, helping it resist corrosion in harsh conditions like coastal environments.

  • Lennox® Quantum™ coil – The exclusive Lennox® Quantum™ coil inside the SL18XC1 has an aluminum alloy construction that helps it resist corrosion, even in harsh conditions like coastal environments.
  • PermaGuard Cabinet – Heavy-guage, galvanized steel construction, louver coil guard, baked on powder finish and durable zinc-coated steel base provide long-lasting protection against rust and corrosion.
  • SmartHinge louver design – Allows quick, easy access to the interior components from all sides for cleaning and maintenance. Protects coil from damage and provides clean appearance..


Designed to Work With Humiditrol Whole-home Dehumidification System

SL18XC1 Lennox A/C is compatible with the Humiditrol® whole-home dehumidification system to make your home environment even more comfortable, while helping to improve the quality of your air. The Humiditrol® whole-home dehumidification system is designed for use with Lennox® cooling equipment. It improves air quality and overall comfort by removing excess humidity from your home.


SL18XC1​​ Lennox Air Conditioner is Solar Ready, for the Highest Possible Energy Savings

SunSource® Home Energy System
Since it’s part of the Dave Lennox Signature® Collection, the SL18XC1 can be easily combined with solar roof modules in a SunSource® Home Energy System. This means it can drastically cut your utility bills and make you eligible for a federal tax credit.

Renewable energy resource
Delivers environmental benefits when upgraded to a SunSource® Home Energy System that turns solar energy into electricity for the home.


Enjoy the Comfort of Connectivity

The SL18XC1 is compatible with the advanced control of the iComfort® S30 Smart Thermostat, which delivers unparalleled comfort and connectivity, whether you’re home or away.


SL18XC1​​ Lennox Air Conditioner – Energy Star® Qualified

When you choose ENERGY STAR qualified heating and cooling products like SL18XC1​​​ Lennox Air Conditioner, you know you’re making a smart choice that can significantly reduce your monthly utility costs.

SL18XC1​​ Lennox Air Conditioner - Energy Star

Lennox offers a wide variety of home heating and cooling products that have earned the ENERGY STAR® label. Each of these products has been designed to deliver year-round energy savings, along with other comfort-enhancing benefits, such as more even temperatures, better humidity control and consistent airflow. If you install a new ENERGY STAR® heating or cooling system, you may qualify for local utility rebates and other energy incentives​.


Chlorine-free R-410a Refrigerant

A friendlier refrigerant refrigerant , which meets the U.S. EPA’s most stringent environmental guidelines. Lennox was one of the first HVAC manufacturers to develop R-410A as an alternative to R-22 (freon). The SL18XC1’s scroll compressor uses the chlorine-free R-410A


Lennox Warranty/SL18XC1​​ Lennox Air Conditioner

Perfect comfort is comfort that brings you peace of mind. That’s why we stand behind our innovative heating, cooling and indoor air quality products with industry-leading warranty coverage. 10-Year Limited Warranty on covered components including compressor.


Home Comfort System

Every Lennox® product has been engineered to deliver best-in-class comfort and efficiency. And when two or more Lennox products are working together as part of a system, the results are truly outstanding.

Your home comfort system is essential to keeping you warm in the winter and cool in the summer. It also helps protect you from allergens and pollutants year round. A home comfort system is made up of Air Conditioner and: Furnace, Thermostat and Indoor Air Quality.


Lennox SL18XC1 Air Conditioner Price, and Installation Cost

Buying a new central air conditioning system represents a substantial investment in comfort, safety, and efficiency. GSHA Services, LTD is your best choice for complete HVAC installation, maintenance, and repair services for replacement systems.

When you call GSHA Services, LTD, you’ll have peace of mind knowing we offer:

  • Same-day service
  • Honest technicians
  • Fair prices
  • Emergency 24-hour services


If you plan on installing a new Lennox Air Conditioning system, or want to expand your existing system, we’ll be happy to schedule a no-cost in home evaluation with one of our trained comfort advisors. We know you want reliability and good value. That’s why we work with the top name brands in the industry. Let us design an efficient, cost-effective system for you. It’s what we do.

To learn more about Lennox air conditioners and compare prices, and installation cost click here

Additional information



ENERGY STAR® Certified



Up to 18.5 SEER

Stages of Cooling


Sound Rating

65 dB