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The most efficient two-stage central air conditioner you can buy*

Price Guide $$$
Efficiency Rating (SEER) Up to 21
Energy Star® ENERGY STAR® Qualified
Warranty 10-Year Limited Warranty on covered components including compressor
Lenox XC21 Air Conditioner | Ainsworth AC

Comfort and efficiency come together perfectly

The XC21’s multi-stage operation allows it to fine-tune your cooling, humidity levels and energy use by matching output to demand. 

Cooling that goes beyond temperature control

Humidity levels can drastically affect how the air in your home feels. It can make the air feel up to 8 degrees warmer than the actual temperature. By working with the Humiditrol® whole-home dehumidification system, the XC21 can preserve your comfort in every way.

Humidity Control

“It is actually cheaper to keep it running all the time rather than turning it on and off, which I love.”

– Donnaw98, Peoria, Illinois

An energy-smart decision you’ll appreciate every day

With efficiencies of up to 21.00 SEER, the XC21 can lower your energy bills by hundreds of dollars a year, while still keeping your home cool and quiet.

Lennox XC21 Air Conditioners | Ainsworth AC

Leading the way in smart energy use

Advanced engineering in the XC21 means enjoying smart, energy-efficient comfort all year long. This product has been designated as one of the Most Efficient ENERGY STAR certified products in 2019. Products that are recognized as the Most Efficient of ENERGY STAR in 2019 prevent greenhouse gas emissions by meeting rigorous energy efficiency performance levels set by the U.S. Environmental Protection Agency.

Most Efficient Energy Star

You’ll hardly know it’s running

The XC21 uses SilentComfort™ technology to reduce operating noise, making it the quietest multi-stage air conditioner you can buy. Even when installed outside a bedroom window, it lets you rest peacefully.

Lennox XC21 Air Conditioner | Ainsworth AC

Everything comes together perfectly

Together with other products from the Dave Lennox Signature® Collection, the XC21 takes comfort to an entirely new place.

Lennox XC21 Air Conditioner | Ainsworth AC