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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 117 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 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
Rated 5 out of 5 by Shhhhhh! This thing has some serious cooling power! I couldn't believe how quiet and smooth this unit runs. Standing 15 feet away, I couldn't tell if it was running! I can hear the neighbor's A/C unit kick on on the other side of the house! lol I felt pretty good going with another Lennox A/C unit. The last one was installed 21 years ago! I wouldn't have replaced it if it wasn't for the coil drip pan rusting out! July 9, 2014
Rated 5 out of 5 by Quiet! They said it would be quiet but it is so quiet you can't tell when it's running. As suggested, we keep the fan on and can't even hear that. Installed in May, now July and the system is great (along with a Lennox variable speed 2 state gas furnace). July 7, 2014
Rated 5 out of 5 by works awesome very quiet and efficient and overall works great . July 4, 2014
Rated 5 out of 5 by The Lennox XP21 is a great buy and a real money-saver The Lennox Signature XP21 is an efficient and verified-good value system that runs super quiet. The two-stage air conditioning keeps us more comfortable and saves us money as it is a SEER 21 system. Mine is paired with a Lennox Signature SL280UHV horizontal air-flow gas furnace and a Lennox icomfort Wi-Fi thermostat to give me excellent efficiency, quiet operation, and the ability to control my house's conditions over the Internet if I want to. And my wife says the house is ever so much more comfortable since we bought the whole system. The financing options were budget-friendly too. July 3, 2014
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