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XC21 Air Conditioner

Dave Lennox Signature® Collection

XC21 Air Conditioner

The quietest and most efficient two-stage central air conditioner you can buy3

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Rated 4.8 out of 5 by 121 reviewers.
Rated 5 out of 5 by 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 Love the performance! We are extremely pleased with our new air conditioners! They are much quieter and cool our home much better! We would recommend Lennox to anyone in the market for a new air conditioner! August 31, 2014
Rated 5 out of 5 by 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 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 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 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 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 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
Rated 5 out of 5 by This product is unbelievably quiet This product runs so quietly that I have to look at the drapes to see if they're moving to know if the air conditioner is running. I have received one billing from my power company since the unit was installed, which was slightly lower than the previous month. I am anxious to see how the total year savings stack up. August 13, 2014
Rated 5 out of 5 Happy with our new air system! The air quality and comfort and quiet is far superior than the unit it replaced. August 13, 2014
Rated 5 out of 5 by Great and Quiet AC Seeing a savings in my power consumption. It is so quiet that at first we question if the unit was running. August 13, 2014
Rated 5 out of 5 by Units have done a very good job cooling our house this summer. We have been pleased with the purchased of our two XC21 units. They have kept our house very cool & comfortable this summer. I like the ability to customize the control of the units with the I-Comfort thermostat. August 12, 2014
Rated 5 out of 5 by Quiet and efficient The difference between our old unit and this one is amazing. You can hardly hear the unit when it runs and so far it has been performing well. iIn comparison with the competitors systems we believe that the value we are getting is superior. August 11, 2014
Rated 5 out of 5 by Awesome This unit is sooooo quiet, you're not even sure it is running. The only way I know it is running is due to how cold our home is now. It is simply awesome how cool the house gets, and STAYS. There is no fluctuation in the inside temperature with the unit playing "catch-up." This unit simply works and works great. It is the Corvette of AC units. August 9, 2014
Rated 5 out of 5 by Efficient, quiet and offers major control over indoor humidity This new system is outstanding, and qualified for excellent rebates both from Lennox and NJ state. The cooling is fast and efficient, but what is most impressive is the ability for the system to control indoor humidity to ~50% within 30 minutes - which during the humid East Coast summers is truly refreshing. August 9, 2014
Rated 5 out of 5 by Great unit After studying the central A/C system market we decided this unit was the best deal for our house. It is quiet. It has two stages. It is well made and has copper parts in it, which helps to avoid a weak spot when connected to the house. The unit is solar ready. The manufacturer offered a good rebate. I wish it was less expensive, though. August 6, 2014
Rated 5 out of 5 by What a difference!!! When it came time to replace our air conditioner, we were concerned with having something that could help cool our 2 story. We chose this product based off of our dealer's recommendation and we are so happy we did. It's so nice to have a comfortable 1st and 2nd story. :) August 6, 2014
Rated 5 out of 5 by just installed. so far excellent Keeps house cool with low humidity, noise free, very little cold draft and very comfortable.. August 4, 2014
Rated 5 out of 5 by It is amazingly efficient for the price. I like how much quieter this system is than my old one. I also think the two stage system keeps my home at a more constant, comfortable temperature. August 3, 2014
Rated 5 out of 5 by This unit is perfect for our home. Finally, a product I can depend on. I don't have to worry about failure of the unit. August 1, 2014
Rated 1 out of 5 Go BIG or go home! It was a little bigger than I expected (we were replacing an almost industrial model, because we didn't have a furnace#. We had a gas furnace installed and chose this machine. The installation was outstanding #no more patio stones, but a composite concrete, foam base) and we couldn't believe how quiet it was. It looks great and the dull colour tones, blend in with the yard. Really pleased. July 31, 2014
Rated 5 out of 5 by Excellent, quite system with lots of features. I recently had the XC21 air conditioner installed as a replacement system for a unit that was 12 years old and so far I am very pleased with the unit. It is much quieter than my previous unit and when paired with the iComfort thermostats, you have access to a lot of features to help keep your home comfortable. July 30, 2014
Rated 5 out of 5 by Great ac unit Cools well and efficiently, was installed well and have had no issues July 26, 2014
Rated 5 out of 5 by Amazing A/C The a/c unit is so quiet, you basically have to be standing next to it to know if it's running or not. Since the unit has been installed, I have been able to keep the thermostat up a few degrees with the same cooling effect as our previous unit. July 25, 2014
Rated 5 out of 5 by This Air Conditioner Is Quiet and Effiient This air conditioning unit will cool my house and maintain it to whatever temperature I set. I couldn't be more pleased. July 16, 2014
Rated 5 out of 5 Very quite and lower operation cost I would never have believe that an a/c unit would be as quite and efficient as this unit is. July 15, 2014
Rated 5 out of 5 by Exceptional quality and value The entire system was installed in a day and we are now enjoying comfort and quiet we never knew existed. The whole house is fresher and more comfortable than ever, and the Wi-Fi touchpad together with smartphone app is really convenient. July 13, 2014
Rated 5 out of 5 by This unit has great features The unit is quiet, efficient (it dehumidifies before cooling), and we love the display and ease of use of the digital programmable thermostat (as well as i-control feature). July 13, 2014
Rated 5 out of 5 by Wonderful Features! I replaced my old Lennox with a newer efficient 2 stage Lennox. It is so quiet you can hardly hear it and it is so efficient that it cools the house off in no time! If there is an excess of humidity, it will take that out only. Love, love, love it! July 11, 2014
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