Best Air Conditioners · head-to-head
LG Dual Inverter Smart Window AC (LW1222IVSM) vs Windmill WhisperTech 12,000 BTU Window AC (12W2WI)
A sourced, side-by-side spec comparison. LG Dual Inverter Smart Window AC (LW1222IVSM) is cheaper at $549. Every spec and price links to its source.
Side by side
| LG Dual Inverter Smart Window AC (LW1222IVSM) | Windmill WhisperTech 12,000 BTU Window AC (12W2WI) | |
|---|---|---|
| US price | $549 (LG.com MSRP) | $549 (Within current street range; Best Buy currently $569.99) |
| Brand | LG | Windmill |
| Released | 2023 | 2024 |
| type | window | window |
| btu | 12000 BTU | 12000 BTU |
| coverage sqft | 550 | 550 |
| noise dba | 44 | 42 |
| smart wifi | true | true |
| energy star | true | true |
| inverter | true | true |
| ceer | 15 | 13.5 |
Sources — LG Dual Inverter Smart Window AC (LW1222IVSM): lg.com (verified 2026-06-15). Windmill WhisperTech 12,000 BTU Window AC (12W2WI): windmillair.com (verified 2026-06-15).