The Signature XC21 is Lennox’s entry into the top of the class competition with the Carrier Infinity, the Trane XL20i and other flagship models from the top brands in the HVAC industry. It has the features, durability and performance to make your home very cool and comfortable, with precise temperature, humidity and air quality control. You’ll pay top dollar for the unit, but if your priorities include excellent indoor comfort and reduced energy consumption, this is one of the top 4 or 5 models to consider. With its very high efficiency, the increased cost over a lower SEER model will be recovered in just a few years in warm climate through lower energy bills. You’ll enjoy premium climate control the whole time. Here are the top features of the Dave Lennox XC21 air conditioner:
2-stage compressor offers quieter operation and more balanced cooling throughout your home.
Compressor sound insulator and low-noise grille makes this one of the quietest AC’s on the market at 69 decibels.
Uses environmentally safer R-410A refrigerant that does not contain ozone-damaging chlorine.
Lennox Systems Operation Monitor measures performance and notifies homeowner of need for maintenance.
The iComfort Touchscreen programmable thermostat offers precise control and ease of use.
Direct-drive fan is precision-balanced for efficient, quiet, durable operation.
Wired for the SunSource Solar-Ready equipment which uses solar modules to power the AC.
Pre-painted, heavy-gauge steel cabinet provides protection, durability and attractive looks.
10-year limited warranty on the compressor and all functional parts.
Energy Efficiency Rating: 
(5/5)
The Lennox Signature Collection XC21 central air conditioner delivers 21 SEER performance which makes it one of the most efficient models currently available. This Energy Star product can be equipped with the advanced Humiditrol whole-house dehumidifier. Lower humidity makes it feel more comfortable at higher temperatures. You’ll feel as comfortable at 78 degrees with this unit as you would at 75 F without Humiditrol. You use less energy with Humiditrol for further cost savings. Overall, this unit can easily reduce cooling costs by 50% when compared with models just 10-12 years old. Keep in mind, however, that if you live in a mild to cool climate and don’t rely heavily on air conditioning, it might take 7-10 years of lower energy bills to make up for the higher price of this model. It might make more sense in terms of cost to install a less efficient, less expensive central air conditioner.
Performance Features Rating: (5/5)
The 2-stage compressor, iComfort thermostat, Humiditrol option and the SunSource option combine to offer best-in-class performance. This unit must be combined with a variable-speed air handler/furnace or or you won’t get the highest possible level of performance. When it is part of a matched system, you’ll have balanced cooling throughout your home as it runs at low-speed most of the time. The Lennox XC21 air conditioner runs longer with each cycle which also allows it to remove more humidity and filter the air more consistently.
User Rating (5/5)
This Dave Lennox Signature Collection XC21 central air conditioner rating comes from consumers who are willing to pay extra for the outstanding indoor comfort and energy savings this model provides. It is Lennox’s best, and that is obvious to those who have it installed.
Overall Rating (5/5)
As you can see, there is a lot to like about this XC21 from Lennox that provides unsurpassed indoor climate quality. It is a good choice for warm climates where high efficiency is important. With its energy efficiency and safer refrigerant, it is also popular with homeowners who are committed to more environmentally conscious air conditioning.
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