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 120 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 This product is efficient Best decision I have made in a long time. Kids complain its too cold in the house, lol. First bill was half cycle and I saved 124$. Super quiet and super comfortable in mu house. August 30, 2014
Rated 2 out of 5 by gmg1 Unit never stops running I have had this unit for approximately 1.5 months. The unit seems to operate constantly to maintain the set indoor temperature AND is it not that hot outside. Example: outdoor temperature = 88. Indoor set point = 74. Unit has been in constant operation from 9:30 AM and has not stopped running. It is currently 2:30 PM. The thermostat is set to 74 and the system just has a problem maintain that temperature. I have now received my first electric bill and the kilowatt hour use has gone up 34% from a year ago. ANS IT NOT THAT HOT OUSIDE. The unit outdoor cover rattles when the unit is in operation and the lennox metal name on the cover rattles very well especially at night. Several adjustments have been made, changing blower speeds, changing thermostat settings, releasing gas from the condenser , adding gas back to the condenser, changing the gas pressure in the condenser, The resulting situation is indicated above. August 29, 2014
Rated 5 out of 5 Works very well The AC seems to work great. Very quiet, and from what I can tell so far on the bill, much cheaper to run than our old one. August 29, 2014
Rated 5 out of 5 by Writermom Great AC This AC unit is so quiet it's almost unbelievable. It has cut our daily electric usage almost in half. It has proved to be very efficient and reliable. We are very happy with it. August 26, 2014
Rated 5 out of 5 by Dave17 Good efficiency options The XC21 provides a variety of efficiency options that help with the monthly cost of operation. The unit is very quite. The unit is quite large but this is necessitated by the need for additional cooling coil size to provide the efficiency. August 26, 2014
Rated 5 out of 5 by Morton22 Product has great performance The air conditioner is performing great and solved an existing problem of cooling an upstairs area very efficiently. August 14, 2014
Rated 5 out of 5 by BW7778 The system is quiet. I like that the air conditioner will operate as a 3 ton unit so as to save energy. It is quiet and I like that it is a 2 stage unit. I also like the circulating fan option. August 13, 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.