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 and the Frigidaire 8,000 BTU Inverter are evenly matched, rated 3.9 and 3.9. The Windmill AC WhisperTech 8,000 BTU costs $8.22 less ($359 vs $367.22).
Frigidaire 8,000 BTU Inverter
#4 in WindowFull review
A compact inverter unit for a bedroom up to 350 sq ft. It’s quieter and cheaper to run than budget fixed-speed models for a modest premium.
Amazon $367.22$367.22
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.
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 | Frigidaire 8,000 BTU Inverter |
|---|---|---|
| Overall rating | 3.9/5 | 3.9/5 |
| Value 30% | 64 $44.88 per 1,000 BTU (certified) | 62 $45.90 per 1,000 BTU (certified) |
| Efficiency 30% | 73 CEER 15 | 73 CEER 15 |
| Quiet 15% | 89 42 dB on low (maker rating) | 89 42 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 |
Specifications
| Windmill AC WhisperTech 8,000 BTU | Frigidaire 8,000 BTU Inverter | |
|---|---|---|
| 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 | No |
| Dehumidifying | - | 60 pints/day |
| Noise | 42 dB | 42 to 55 dB |
| Efficiency and power | ||
| CEER | 15 Btu/Wh | 15 Btu/Wh |
| Certified by | ENERGY STAR | ENERGY STAR |
| ENERGY STAR | Yes | Yes |
| Power | 740 W | 770 W |
| Voltage | 115 V | - |
| Current | 6.8 A | 6.8 A |
| Refrigerant | R-32 | R-32 |
| Controls and fit | ||
| Wi-Fi app | Yes | Yes |
| Remote | Yes | Yes |
| Window width | 23 to 37 in wide | 24 to 36 in wide |
| Dimensions | 13.3 x 19.3 x 22.5 in | 13.5 x 18.6 x 19.6 in |
| Weight | 61 lb | 44.1 lb |
| Warranty | 1 years | 1 years |