LG Dual Inverter 12,000 BTU
#6 in WindowFull review
A strong choice for a big living room or open-plan space. It’s efficient and quiet for its size if you can handle the 85 lb install.
Amazon $559$559
The LG Dual Inverter 12,000 BTU rates 3.8 among window air conditioners; the SereneLife SLPAC12.5 rates 2.9 among portable ones. The SereneLife SLPAC12.5 costs $169.10 less ($389.90 vs $559).
SereneLife SLPAC12.5
#9 in PortableFull review
A basic portable for a small-to-medium room; its real (SACC) capacity is much lower than the headline number.
Amazon $389.90$389.90
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
These two sit in different type classes (window and portable), and each is scored against the reference points for its own class, so a rating says how well each does among its own type peers. How we rank explains each factor.
| Factor weight | LG Dual Inverter 12,000 BTU | SereneLife SLPAC12.5 |
|---|---|---|
| Overall rating | 3.8/5 | 2.9/5 |
| Value 30% | 61 $46.58 per 1,000 BTU (certified) | 57 $55.70 per 1,000 BTU (SACC) |
| Efficiency 30% | 73 CEER 15 | 50 efficiency not certified (neutral score used) |
| Quiet 15% | 78 44 dB on low (maker rating) | 50 noise not published (neutral score used) |
| 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
| LG Dual Inverter 12,000 BTU | SereneLife SLPAC12.5 | |
|---|---|---|
| Cooling | ||
| Type | Window | Portable, single hose |
| Certified capacity | 12,000 BTU | 7,000 BTU |
| ASHRAE rating (95 °F) | - | 12,000 BTU |
| Room size (maker) | 550 sq ft | 550 sq ft |
| Inverter compressor | Yes | No |
| Heat | No | No |
| Dehumidifying | 86.4 pints/day | - |
| Noise | 44 to 58 dB | - |
| Efficiency and power | ||
| CEER | 15 Btu/Wh | - |
| Certified by | ENERGY STAR | - |
| ENERGY STAR | Yes | - |
| Power | 1,020 W | 1,150 W |
| Voltage | 115 V | - |
| Current | 9.1 A | - |
| Refrigerant | R-32 | - |
| Controls and fit | ||
| Wi-Fi app | Yes | - |
| Voice assistants | Alexa, Google Assistant | - |
| Remote | Yes | Yes |
| Window width | 27 to 39 in wide | - |
| Dimensions | 14.9 x 23.6 x 28.8 in | 32.1 x 17.4 x 13.4 in |
| Weight | 85 lb | 58.9 lb |
| Warranty | 1 years | 1 years |