Dave Lennox Signature® Collection
XC21 Air Conditioner
The quietest and most efficient two-stage central air conditioner you can buy3
Discover absolute home comfort with the XC21, engineered for quiet and highly efficient operation. Exclusive SilentComfort™ technology works to maintain a more consistent temperature throughout your home, while helping to keep energy costs under control.VIEW PRODUCT DEMO >>
Here are some of the top features of the XC21:
Efficiency rating of up to 21.20 SEER can save you hundreds of dollars each year*, compared to a standard air conditioner.
SunSource® Solar-Ready option allows you to add solar modules and create a solar powered system that generates electricity for your air conditioner and more.
ENERGY STAR® qualified which means it meets or exceeds EPA guidelines for energy efficiency.
This product has been designated as one of the Most Efficient ENERGY STAR qualified products in 2014. Products that are recognized as the Most Efficient of ENERGY STAR in 2014 prevent greenhouse gas emissions by meeting rigorous energy efficiency performance levels set by the U.S. Environmental Protection Agency.
SilentComfort™ Outdoor Fan Motor with Composite Fan Blades provides extremely reliable starting and running performance, even under the harshest outdoor conditions.
Features and Benefits
Warranty and Specs
Rated 4.8 out of 5 by 134 reviewers.
Rated 5 out of 5 by Gladweboughtit Great I never write reviews but in this case made an exception. We had to replace a 13 year old unit (a/c and heater). The outside unit was quite noisy and bothersome whenever it was running. As we were researching new units this Lennox model kept coming up for quietness and operation. In short, while it is expensive, it is an amazing unit and thus far has given us no problems (4 months into its use). It is whisper quiet. We almost went with a less expensive unit but we are glad we chose this one. October 3, 2013
Rated 5 out of 5 by X4givnX Quiet and efficient After a month of owning the unit we have noted that we can hardly hear it working and that it cut down on our costs October 16, 2014
Rated 4 out of 5 by 7207 the product hs a flaw that should be improved the top of the compressor has wide caps that allow debris to fall inside the unit. this flaw should be changed. October 9, 2014
Rated 5 out of 5 by MLB26 beautiful AND functional quiet and although larger than the old ones, it is nicely designed and upgraded with better quality materials. September 22, 2014
Rated 5 out of 5 by vivid I can hardly hear it! This unit is so quiet! The 2 stage cooling has saved us quite a bit on our electric bill this summer. September 21, 2014
Rated 5 out of 5 by BOBUNI FANTASTIC AC UNIT I am so impressed with the fantastic cooling power my new unit has. I was blown away when a hot/humid day came upon us by surprise, and the house was obnoxious inside. Fifteen minutes after turning on the new ac unit, it was comfortable. Thank YOU LENNOX September 20, 2014
Rated 5 out of 5 by coolinfla231 Awesome This unit is a quiet comfort storm. Hooked to the icomfort thermostat. Amazing comfort. September 20, 2014
Rated 5 out of 5 by Charlie15 This is a Quality and Efficient Product I decided on Lennox as the A/C system that I wanted installed in my home after reviewing Consumer Reports. Lennox was rated very highly by Consumers even though it was more expensive then other models. It was also ratted at the top by Consumers for least number of service calls. I also had asked around to people that I respected as to which system they had and all of them said to purchase Lennox. I wanted a system that I felt was going to be trouble free and last for many years and Lennox is that system. I chose the X21 Model over the X17 Model even though it was more expensive due to it being a two stage system, which runs more efficiently and only uses 75% of it's capacity on most heating days. It can also crank out the extra 25% capacity for those 99 degree and 79% humidity days without any problem. I calculated that they X21 would pay for the higher price difference in approximately 5 years. This definitely made the decision easy for me. Lennox is the only way to go and whatever Model you choose won't be the wrong decision. September 17, 2014
*This chart compares the 5-year savings you can expect from a 21.20 SEER air conditioner vs. existing equipment with a 10.00 SEER rating and industry-standard equipment with a 13.00 SEER rating. The region used to calculate household fuel and utility costs reflect a cross-section of cities in the U.S. In addition to geography, cooling costs are based on 3-ton capacity specifications, with 1,800 cooling hours per year and 11.62 cents per KWh (Source: EIA National average electric rate-Rolling 12 months ending July 2009). Your actual costs will vary depending on the weather, local fuel rates, system settings and your personal lifestyle.
**iComfort Wi-Fi® Touchscreen Thermostat must be installed with an iComfort-enabled indoor unit for maximum performance.
***Consult your tax expert before claiming energy efficiency tax credits.
****Must be accompanied by either a variable speed air handler or furnace and the ComfortSense® 7000 Series touchscreen thermostat.
†Sound Rating Number according to ANSI/AHRI Standard 270-2008. "SRN" is the overall A-Weighted Sound Power Level, (LWA), dB (100Hz to 10,000Hz). Sound information based on 3 ton models. Standard system is a 13ACX with a 76 dB sound rating.