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 128 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 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
Rated 5 out of 5 by BroncoDuck Excellent quality and love how quiet it is. If it weren't for the excellent cooling we would hardly know it was working. It is so quiet compared to our old air conditioner and those of our neighbors! Very efficient and effective. September 16, 2014
Rated 5 out of 5 by Zimm System Works Great Replaced the air and furnace. The entire system works great! Definitely would recommend Lennox. September 14, 2014
Rated 5 out of 5 by Linnette1956a Quietest air conditioner we have ever had! For the price, this is a superb product! It is quiet and ultra efficient. We are very happy with our purchase! September 9, 2014
Rated 5 out of 5 by Sport Savings Great product quiet and efficient. Big savings on utility bill. It will not pay for its self for 20 years +, but still the reduction in the monthly bill is nice. September 8, 2014
Rated 5 out of 5 by Steedy33 Very quiet unit This unit was bigger than our old one yet it runs super quiet and much more efficient. Great job Lennox! September 5, 2014
Rated 5 out of 5 by JoeN Super efficient and quiet! This system cools the entire home quickly and consistently and it is super quiet. I'm actually looking forward to my electric bill to see my savings! September 2, 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.