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 2.5. The Windmill AC WhisperTech 8,000 BTU leads on efficiency, inverter & app and quiet. The Frigidaire 8,000 BTU Window AC wins on value. The Frigidaire 8,000 BTU Window AC costs $70 less ($289 vs $359).
Frigidaire 8,000 BTU Window AC
#21 in WindowFull review
A budget unit for a room up to 350 sq ft where price matters more than noise or running cost.
Amazon $299 AJ Madison $289$289
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 10.9), inverter & app (inverter compressor, Wi-Fi app vs fixed-speed compressor, no app) and quiet (42 dB on low (maker rating) vs 53.5 dB on low (maker rating)).
- Choose the Frigidaire 8,000 BTU Window AC for value ($36.12 per 1,000 BTU (certified) vs $44.88 per 1,000 BTU (certified)).
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 Window AC |
|---|---|---|
| Overall rating | 3.9/5 | 2.5/5 |
| Value 30% | 64 $44.88 per 1,000 BTU (certified) | 80 $36.12 per 1,000 BTU (certified) |
| Efficiency 30% | 73 CEER 15 | 0 CEER 10.9 |
| Quiet 15% | 89 42 dB on low (maker rating) | 25 53.5 dB on low (maker rating) |
| Inverter & app 15% | 100 inverter compressor, Wi-Fi app | 0 fixed-speed compressor, no app |
| Warranty 10% | 0 1-year warranty | 0 1-year warranty |
Specifications
| Windmill AC WhisperTech 8,000 BTU | Frigidaire 8,000 BTU Window AC | |
|---|---|---|
| Cooling | ||
| Type | Window | Window |
| Certified capacity | 8,000 BTU | 8,000 BTU |
| Room size (maker) | 350 sq ft | 350 sq ft |
| Inverter compressor | Yes | No |
| Heat | No | No |
| Dehumidifying | - | 40.8 pints/day |
| Noise | 42 dB | 53.5 to 59 dB |
| Efficiency and power | ||
| CEER | 15 Btu/Wh | 10.9 Btu/Wh |
| Certified by | ENERGY STAR | DOE |
| ENERGY STAR | Yes | No |
| Power | 740 W | 720 W |
| Voltage | 115 V | - |
| Current | 6.8 A | 8.4 A |
| Refrigerant | R-32 | R-32 |
| Controls and fit | ||
| Wi-Fi app | Yes | No |
| Remote | Yes | Yes |
| Window width | 23 to 37 in wide | 23 to 36 in wide |
| Dimensions | 13.3 x 19.3 x 22.5 in | 13.25 x 18.5 x 15.5 in |
| Weight | 61 lb | 43.6 lb |
| Warranty | 1 years | 1 years |