Lennox Signature XC21

Energy Efficiency Up to 20.5 SEER
Sound Rating As low as 69 dB
Quiet Operation SilentComfort Technology
Cabinet SmartHinge Louvred Design
Environmentally Responsible R410A
Energy Star Qualified Yes
On-board Diagnostics Yes
Full Line of Scroll Compressor Yes
Tow-Stage Operation Yes
Compressor / Parts Warranty 10 year limited warranty on compressor and covered components