Windmill AC WhisperTech 8,000 BTU
#3 in WindowFull review
A stylish, quiet inverter unit for a bedroom up to 350 sq ft. It’s priced close to the big-brand inverter models.
Amazon $359$359
The Windmill AC WhisperTech 8,000 BTU is the better air conditioner overall, rated 3.9 to 3.8. The Windmill AC WhisperTech 8,000 BTU leads on efficiency and quiet. The Midea 8,000 BTU Inverter with Heat costs $19.01 less ($339.99 vs $359).
Midea 8,000 BTU Inverter with Heat
#8 in WindowFull review
A good fit for a 350 sq ft room that needs cooling in summer and some heat in the shoulder seasons. The inverter keeps it efficient and fairly quiet.
Amazon $339.99$339.99
Prices were last checked October 22, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Which should you buy?
- Choose the Windmill AC WhisperTech 8,000 BTU for efficiency (CEER 15 vs CEER 14.5) and quiet (42 dB on low (maker rating) vs 45 dB on low (maker rating)).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every window air conditioner; a clear win is highlighted. How we rank explains each one.
| Factor weight | Windmill AC WhisperTech 8,000 BTU | Midea 8,000 BTU Inverter with Heat |
|---|---|---|
| Overall rating | 3.9/5 | 3.8/5 |
| Value 30% | 64 $44.88 per 1,000 BTU (certified) | 68 $42.50 per 1,000 BTU (certified) |
| Efficiency 30% | 73 CEER 15 | 64 CEER 14.5 |
| Quiet 15% | 89 42 dB on low (maker rating) | 72 45 dB on low (maker rating) |
| Inverter & app 15% | 100 inverter compressor, Wi-Fi app | 100 inverter compressor, Wi-Fi app |
| Warranty 10% | 0 1-year warranty | 0 1-year warranty, 5 on the sealed system |
Specifications
| Windmill AC WhisperTech 8,000 BTU | Midea 8,000 BTU Inverter with Heat | |
|---|---|---|
| Cooling | ||
| Type | Window | Window |
| Certified capacity | 8,000 BTU | 8,000 BTU |
| Room size (maker) | 350 sq ft | 350 sq ft |
| Inverter compressor | Yes | Yes |
| Heat | No | Heat pump |
| Noise | 42 dB | 45 dB |
| Efficiency and power | ||
| CEER | 15 Btu/Wh | 14.5 Btu/Wh |
| Certified by | ENERGY STAR | ENERGY STAR |
| ENERGY STAR | Yes | Yes |
| Power | 740 W | - |
| Voltage | 115 V | - |
| Current | 6.8 A | - |
| Refrigerant | R-32 | R-32 |
| Controls and fit | ||
| Wi-Fi app | Yes | Yes |
| Voice assistants | - | Alexa, Google Assistant |
| Remote | Yes | Yes |
| Window width | 23 to 37 in wide | 23.6 to 38.8 in wide |
| Dimensions | 13.3 x 19.3 x 22.5 in | 13.9 x 19.4 x 22.2 in |
| Weight | 61 lb | 56 lb |
| Warranty | 1 years | 1 years |
| Sealed system warranty | - | 5 years |