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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 128 reviewers.
Rated 5 out of 5 by QUIET!!! I'ts so quiet...sometimes I wonder if it's running! April 3, 2013
Rated 5 out of 5 by The features are more than we could have hoped for! We are very pleased with our new Lennox XC21 AC and wouldn't hesitate to recommend it to family and friends. We have had Lennox products before and our neighbor just got one, too. March 30, 2013
Rated 5 out of 5 by Quite I have to Look at the LED Display to see What Mode it is in. March 25, 2013
Rated 5 out of 5 by so quiet I could have a conversation between two of them while they are running It amazes me how quiet the units are and how professionally the units were installed. No cutting corners everything done correct the first time. March 13, 2013
Rated 5 out of 5 by Very quiet unit. This product has great features but my favorite is the noise level. Great product and would highly recommend it. March 6, 2013
Rated 5 out of 5 by Highly efficient and Quiet Love these units! My neighbors were scared that the units were going to create a disturbance to their sleeping. When they were running, I had to go over to them to explain that the units were running. They stated "I can't here them" I said "I Know but I can here your window unit on your second floor". These units are so quiet that having them outside of our window doesn't even bother us. The units 2 stages save energy and keeps our electric bill down as well as keep us comfortable. February 23, 2013
Rated 5 out of 5 by Great product Just got but since its a Lennox it's got to be a great product! February 22, 2013
Rated 5 out of 5 by wonderful and very quiet the air handler is next to the master bedroom the old system was loud with you do not hear it you just feel it.it's great February 21, 2013
Rated 5 out of 5 by Great for the South The air conditioner does a great job of removing humidity as well as generally cooling a circulating the air. Perfect for humid Southern nights. February 15, 2013
Rated 1 out of 5 by First class product Quiet, super efficient, this unit is terrific. Should have switched out 2 years ago. The tax credits made it even more attractive! February 13, 2013
Rated 5 out of 5 by cant even hear it run great system a lot of features and easy maintenance and outstanding unit. February 10, 2013
Rated 5 out of 5 by Impressive product, meets my expectations! These system units are massive, but good looking. Clearly designed for the efficiency of their task. The two stage fans are so nice and quiet, and even when the outdoor compressor kicks on, you can hear how quiet it is in comparison to the old systems. For the bedroom next to them, it is a major positive change in interior noise. The icomfort controllers I initially thought were maybe too much technology for what is required, but being able to adjust them or set them to away from your ipad or iphone is really a wonderful feature. Also great to check on your system operations, while on the road. February 9, 2013
Rated 5 out of 5 by super quiet quiet efficient and very reliable taller than the old one but same foot print February 8, 2013
Rated 5 out of 5 by Worth every penny!! Excellent product!. Already my electric bill has been so much lower! LOVE it! February 7, 2013
Rated 5 out of 5 by Great Product Very quiet and energy efficient. Much quieter than my old unit. I know I will see a difference in my energy bill. February 2, 2013
Rated 5 out of 5 by Very quiet and works well. I would reccommend this A/C unit to friends and family. With all the rebates and tax credit, it is a very good time to buy. February 1, 2013
Rated 5 out of 5 by This AC unit reduced our utility bill greatly. We have zone heating and cooling, so when we installed our new AC unit, the difference was noticeable. The rooms stayed cooler on a higher setting and we noticed that our electric bill was lower! The unit outside is also quieter than our old unit and more attractive. January 23, 2013
Rated 5 out of 5 by Anticipate great cooling Just replaced our cooling unit with the Lennox model. Still winter here, but I expect this unit will cool efficiently and quietly...just like our previous unit at our prior home. January 23, 2013
Rated 5 out of 5 by Excellent product We installed this unit in Dec. and have really enjoyed it. It is so quiet you never know when its running unless you check the thermostat. January 16, 2013
Rated 5 out of 5 by Very happy with this product We've had our new Lennox A/C unit for ab0ut 9 months now and are completely happy with it's performance. January 10, 2013
Rated 5 out of 5 by This product is very quiet I love our new system! It is much more quiet and way more efficeint than our old model. It cools down the whole house very quickly. January 9, 2013
Rated 5 out of 5 by This product is quiet and efficient. Two stage cooling is nice feature and also high EER ratting. The compressor/condensor unit is massive compared to other brands, so make sure you have sufficient space to locate this beast. January 5, 2013
Rated 5 out of 5 by Quiet and efficient Super quiet and efficient during operation. Consumes less energy than previous system. January 2, 2013
Rated 5 out of 5 by Great Air Conditioner Overall great air conditioner. Works as described and is a great value. January 1, 2013
Rated 5 out of 5 by Two stage operation is a real benefit The unit is incredibly quiet with the 2 stages. This also leads to better efficiency and a more even flow distribution December 31, 2012
Rated 5 out of 5 by Very efficient and quiet machines Couldn't be happier... My power bill went down substantially and the units are so much quieter inside and outside. December 30, 2012
Rated 4 out of 5 by Watch out for ice on top forming ice cicles inside unit which can stop fan without registering an alert. Very efficient and quiet unit. Only issue in 1 1/2 years has been ice forming on the top of the unit blockiong the fan from operatuon. Since the top of the heat pump is completely open without any weather guard, ice can form on the top of the unit leading to ice cicles dripping down inside of the unit. Then when the fan stops, ice can form between the the ice cicles and the plastic fan blades because there is only a 1/8 inch clearance between the inside of the unit and the fan blades. The small efficient electric fan moter is not strong enough to break the fan blades free from the ice. Curiously, the "smart" thermostat apparently cannot detect the non-operation of the outside fan and does not provide an alert to the homeowner that the fan is not operating. December 29, 2012
Rated 5 out of 5 by This unit provides energy efficient cooling, which qualifies it for energy saving rebates. We were pleased that Lennox provided an energy efficient unit that allows us to cool our home while minimizing the cost to run the unit. This efficiency qualified us to receive significant rebates from multiple sources. December 28, 2012
Rated 5 out of 5 by I LOVE 2 speed A/C I can't believe what a difference having a 2 speed air conditioner. We had multiple thermostats installed to run our system, and many times we don't even realize it is on. December 27, 2012
Rated 5 out of 5 by Terrific system and coordination with heating and thermostat was a selling feature An excellent unit which delivers everything it promised too. Wisper quiet and with remote access and coordination with our wifi thermostat and gas furnace, it is a winning combination for us. December 27, 2012
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