Rated 5 out of 5 by Galo Bristling with technology, works like a charm...
After dozens of hour of research, we purchased two of these units to cool our townhome in Puerto Rico, selecting a 4 ton XC21 for the bedroom areas and a smaller 2 ton XC21 for the living, dining and kitchen areas replacing an older 5-ton unit of nondescript origin. Splitting the units and ducting allowed to us to 'zone' A/C operation as we needed to depending on where we were in the property. Both were paired with with the MV32 variable-speed blower coil/air handling unit and together, these are absolutely be best ACs we have ever had or seen. They were the first XC21's installed on the island -this was back in summer of 2006. Current draw dropped so much that we had to resize the breakers as the units draw less than 25 amps when both are on at the compressor's 'low' speed. The variable-frequency drives on the blower coils and the myriad of operation 'duty curves' programs allowed by configuring the various jumpers on the blower coil control board allow you to set initial run to a lower air handling speed to allow for maximum humidity extraction for a few minutes after the compressors kick in, keeping some circulation going at 20% speed even when the compressors are off, setting blower speed ramp-down speed when the compressors shut off and many other duty cycle options on the blower coils. In short, fantastic pieces of equipment. Worth every penny. They have been running flawlessly for six years, so....don't be afraid of the technology as they are stone reliable.
November 19, 2012
Rated 5 out of 5 by Beth Great Cooling Power!
Best A/C unit ever purchased. Most efficient and powerful air conditioner on the market. Would HIGHLY recommend this product to ANYONE.
November 17, 2012
Rated 5 out of 5 by William Excellent product
Well designed, engineered and manufactured product. Extremely efficient. Totally quiet. Installed by highly trained and profession technicians. All aspects of installation and use of functions were thoroughly explained.
November 14, 2012
Rated 5 out of 5 by William Love the performance of this product. Very efficient and super quiet.
This unit has perfored flawlessly. It is super quiet and very efficient. Expecting to see lowered electrical bills.
November 6, 2012
Rated 5 out of 5 by jake70 Great Features
Don't understand the technology, but this is a great product. You really can't hear it even when upstairs where the unit is located.
The cooling is so efficient that it allows me to adjust the thermostat upwards, thereby saving on my electricity. It is more than adequate for the size (3640 sq ft) of this house.
The air quality indoors has also improved alleviating some of the allergy discomfort sometimes experienced by family members. Great Product!!!
November 5, 2012
Rated 5 out of 5 by SpartanMark53 Cut our energy bill in half!
This unit is great! It's extremely quiet, and it cut our electric bill in half! We also love the two stage feature. It's like two air conditioners in one. It is a little expensive, but worth it. It's true what they say, you get what you pay for!
October 8, 2012
Rated 2 out of 5 by MADW Not "the most quiet". Very loud & noisy.
Extremely loud, rattling, noisy and unreliable, but yet very, very pricey.
October 6, 2012
Rated 5 out of 5 by mick quite and very efficient
very efficient and quite unit and other tume ups each spring no problems
October 3, 2012
Rated 5 out of 5 by Andy65 Excellent AC Unit.
2 stage A/C Excellent unit. We really like the quiet outside compressor. The Lennox touch screen thermostat is user friendly. I would recommend this unit to anyone.
October 2, 2012
Rated 5 out of 5 by Senses Great performance with
We replaced an older Lennox with this new model. The difference in efficiency was dramatic. We have had record breaking heat this summer, but the air conditioner was certainly capable. The electric bills were significantly lower than last year when the weather was mild for summer. We love the two stage fan which we run most of the time. The temperature in the house is more even. The outside unit is very quiet which is an advantage.
September 28, 2012
Rated 5 out of 5 by Dean56 Exceptionally quiet and Efficient
I purchased this air conditioner paired with a new lennox two stage high efficiency gas furnace. This system single system was purchased to replace two separate systems which previously heated and cooled my home. Paired with zone controls, this system has resulted in a significant reduction in operating costs as compared to the old systems while delivering a more uniformly heated and cooled environment for our 2-story home. Glad we purchased this Lennox equipment.
September 28, 2012
Rated 5 out of 5 by Butchie1968 It is so quite and 7 years have had no problems with the unit.
It is a great unit and I feel that we are saving on our electric bill. When you are outside you do not hear the compressor except when you walk by it.
September 27, 2012
Rated 5 out of 5 by Golferabb The XC21 is Well Worth the Money
For the one year our XC21 has been in service, our electric usage has dropped an average of 5 kwh/day. Both the compressor and air handler are extremely quiet. We couldn't be more pleased.
September 27, 2012
Rated 5 out of 5 by hlhzimm Previous good experience
Before I moved to Florida, I had a Lennox A/C in my previous home that was reliable and functioned trouble free for 26 years. The unit in my new home failed after nine years. I decided to stick with a winner, and went back to Lennox. I have not regretted that decision.
September 27, 2012
Rated 5 out of 5 by DANL Saving and Comfort
Our purchase of the Lennox XC21 was a winner from the first month of installation. We have had the unit for just at a year. This summer was a hot one, hotter than last year. We enjoyed a 45% decrease in our power bill, our home stays at a comfortable 78 degrees with the relative humility @ 39 percent.Our investment in Lennox was a great choice.We would recommend Lennox to anyone looking for a great Air Conditioner.
September 26, 2012
Rated 5 out of 5 by JoeS Very Quiet and High Efficiency
Very Quiet Unit. Very High Efficient. Very Energy Efficient.
August 16, 2012
Rated 5 out of 5 by cacox12 keeps us comfortable
this product is amazing. it keeps us cool and comfortable as well as saves on utility bills
August 15, 2012