Lennox XC21 Air Conditioner
| Energy Efficiency | Up to 21.00 SEER |
| Stages of Cooling | Two-Stage |
| Sound Rating | As low as 69 dB |
| SilentComfort™ Technology | ✓ |
| Solar-Ready Design | ✓ |
| Environmentally Responsible | R-410A refrigerant and Solar Ready |
| Cabinet | PermaGuar™ Cabinet and SmartHing™ Louver Design |
| On-board Diagnostics | iComfort®-enabled technology |
| Full Line of Scroll Compressors | ✓ |
| Compressor/Parts Warranty | 10-Year Limited Warranty on covered components including compressor |