LG
LG Dual Inverter Smart Window AC (LW1222IVSM)
$549
Released 2023
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 comparison. LG Dual Inverter Smart Window AC (LW1222IVSM) is cheaper at $549. Every spec and price links to its source.
Windmill
Windmill WhisperTech 12,000 BTU Window AC (12W2WI)
$549
Released 2024
Full spec sheet
✓ marks the stronger figure where "more" — or "less", for price and weight — is unambiguously better.
| Spec | LG Dual Inverter Smart Window AC (LW1222IVSM) | Windmill WhisperTech 12,000 BTU Window AC (12W2WI) |
|---|---|---|
| US price | $549 LG.com MSRP | $549 |
| Brand | LG | Windmill |
| Released | 2023 | 2024 |
| Type | window | window |
| Btu | 12000 BTU | 12000 BTU |
| Coverage (sq ft) | 550 | 550 |
| Noise dba | 44 | 42 |
| Smart Wi-Fi | Yes | Yes |
| Energy star | Yes | Yes |
| Inverter | Yes | Yes |
| Ceer | 15 | 13.5 |
Sources — LG Dual Inverter Smart Window AC (LW1222IVSM): lg.com (verified 2026-06-28). Windmill WhisperTech 12,000 BTU Window AC (12W2WI): windmillair.com (verified 2026-06-15).
What's the difference between the LG Dual Inverter Smart Window AC (LW1222IVSM) and Windmill WhisperTech 12,000 BTU Window AC (12W2WI)?
Where the two actually differ on the specs we track (2 of 8). Matching specs are omitted.
- Noise dba: LG Dual Inverter Smart Window AC (LW1222IVSM) 44 vs Windmill WhisperTech 12,000 BTU Window AC (12W2WI) 42
- Ceer: LG Dual Inverter Smart Window AC (LW1222IVSM) 15 vs Windmill WhisperTech 12,000 BTU Window AC (12W2WI) 13.5