| Smart Whisper | Smart Whisper Max Heat | Whisper |
| SEER: 23 | SEER: 23.5 | ENERGY STAR rated? No |
| ENERGY STAR rated? Yes | ENERGY STAR rated? Yes | Cooling output: 7,000 to 24,000 Btus |
| Cooling output: 9,000 to 24,000 Btus | Cooling output: 9,000 to 24,000 Btus | Mount: Wall |
| Mount: Wall | Mount: Wall | Unit: Indoor |
| Zones: Single | Zones: Single | |
| Style: Heat pump | Style: Heat pump | |
| Unit: Indoor and outdoor | Unit: Indoor and outdoor | |
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