# Windmill WhisperTech 12,000 BTU Window AC (12W2WI) vs Hisense UltraSlim 12,000 BTU Smart Inverter Window AC (AHLW1225TW1W): specs and price compared

A sourced, side-by-side comparison of the Windmill WhisperTech 12,000 BTU Window AC (12W2WI) (Windmill) and Hisense UltraSlim 12,000 BTU Smart Inverter Window AC (AHLW1225TW1W) (Hisense) among air conditioners. Hisense UltraSlim 12,000 BTU Smart Inverter Window AC (AHLW1225TW1W) is the cheaper of the two at $449.

## Side by side

| Spec | Windmill WhisperTech 12,000 BTU Window AC (12W2WI) | Hisense UltraSlim 12,000 BTU Smart Inverter Window AC (AHLW1225TW1W) |
| --- | --- | --- |
| US price | $549 | $449 |
| Brand | Windmill | Hisense |
| Released | 2024 | 2024 |
| Type | window | window |
| Btu | 12000 BTU | 12000 BTU |
| Coverage (sq ft) | 550 | 450 |
| Noise dba | 42 | 37 |
| Smart Wi-Fi | Yes | Yes |
| Energy star | Yes | Yes |
| Inverter | Yes | Yes |
| Ceer | 13.5 | 15 |

## Key differences

- Coverage (sq ft): Windmill WhisperTech 12,000 BTU Window AC (12W2WI) 550 vs Hisense UltraSlim 12,000 BTU Smart Inverter Window AC (AHLW1225TW1W) 450
- Noise dba: Windmill WhisperTech 12,000 BTU Window AC (12W2WI) 42 vs Hisense UltraSlim 12,000 BTU Smart Inverter Window AC (AHLW1225TW1W) 37
- Ceer: Windmill WhisperTech 12,000 BTU Window AC (12W2WI) 13.5 vs Hisense UltraSlim 12,000 BTU Smart Inverter Window AC (AHLW1225TW1W) 15

## Sources

- Windmill WhisperTech 12,000 BTU Window AC (12W2WI): https://windmillair.com/pages/technical-specs (windmillair.com, verified 2026-06-15)
- Hisense UltraSlim 12,000 BTU Smart Inverter Window AC (AHLW1225TW1W): https://www.bestbuy.com/product/hisense-450-sq-ft-12000-btu-cooling-window-air-conditioner-inverter-white/J3GW2J3H5L (bestbuy.com, verified 2026-06-15)

Canonical: https://frontdeskreview.com/gear/air-conditioners/windmill-12w2wi-whispertech-vs-hisense-ahlw1225tw1w-ultraslim/
Cite: Per The Front Desk Review, Windmill WhisperTech 12,000 BTU Window AC (12W2WI) ($549) vs Hisense UltraSlim 12,000 BTU Smart Inverter Window AC (AHLW1225TW1W) ($449) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/air-conditioners/windmill-12w2wi-whispertech-vs-hisense-ahlw1225tw1w-ultraslim/
License: CC BY 4.0.