Midea U 12,000 BTU Smart Inverter Window AC vs LG Dual Inverter 12,000 BTU
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Quick take: The Midea U 12,000 BTU Smart Inverter Window AC costs $159 less; the Midea U 12,000 BTU Smart Inverter Window AC is the quieter machine (32 dB on low).
| Spec | Midea U 12,000 BTU Smart Inverter Window AC | LG Dual Inverter 12,000 BTU |
|---|---|---|
| Price | $400 | $559 |
| Rating | 4.5★ (115) | 4.6★ (42) |
| Type | U-Shaped Window | Window |
| Capacity (ASHRAE) | 12k BTU | 12k BTU |
| SACC (delivered) | — | — |
| Coverage | ~550 sq ft | ~550 sq ft |
| Noise (lowest) | 32 dB | 44 dB |
| CEER (efficiency) | 15 | 15 |
| Compressor | Inverter (variable) | Inverter (variable) |
| Heating | — | — |
| Window Fit | 22–36 in | 27–42 in |
| Voltage | 115V | 115V |
| Weight | 75 lbs | 83 lbs |
| WiFi Control | Built-in | Built-in |
| Install | The biggest U is a genuinely heavy install: roughly 75 lbs, so the sill bracket must be mounted dead level and you absolutely want two people to lift the chassis into it. Once seated, the window sash closes down through the U-channel — that's what isolates the compressor noise outside — and the window remains operable. Fit is 22-36 inch wide single/double-hung windows; check your opening height (13.75 in minimum) because the 12K chassis is tall. Get the rearward tilt right for drainage, especially on this platform. | Same 83-pound, 28.75-inch-deep chassis as the smaller LG inverters, so treat it as a two-person job with a proper support bracket — the weight bias is heavily rearward. Minimum window width is 27 inches (max ~42) with about 16 inches of sash height needed. Walmart reviewers repeatedly flag the size and weight as the hardest part of ownership; once it's in, the included curtains and seal kit are better than average. Plan on the cabinet protruding into the room a couple of inches on shallow sills. |
| Warranty | 1 year parts & labor | 1-year parts & labor; 10-year warranty on the dual inverter compressor |
Pros & cons
Midea U 12,000 BTU Smart Inverter Window AC
- ✓Whisper-quiet at low and mid speeds despite 12,000 BTU on tap
- ✓Inverter efficiency (CEER 15) — dramatically cheaper to run than fixed-speed 12Ks
- ✓Widely available and aggressively priced at Costco, Lowe's, and Amazon
- ✓Window stays operable; sash-in-channel design also deters break-ins
- ✓Holds set temperature tightly in big rooms instead of sawtoothing
- ✓Smart control via app, Alexa, Google; remote included
- ✓MShield 2026 revision directly addresses the old mold weak point
- ✗~75 lbs — the hardest U-shape to install, strictly a two-person lift
- ✗Recall history on pre-2026 units; secondhand buys need the drain fix verified
- ✗Audible fan rush at max cooling, if never compressor grind
- ✗Tall chassis won't clear shorter window openings
- ✗1-year warranty trails the category's premium pricing
- ✗App remains the weakest part of the ownership experience
LG Dual Inverter 12,000 BTU
- ✓Covers 550 sq ft without needing a 230V circuit
- ✓CEER 15.0 Energy Star rating keeps long runtimes cheap
- ✓As low as 44 dB — living-room conversation stays effortless
- ✓Inverter's long low-speed runs pull humidity better than cycling units
- ✓4 cooling speeds plus dedicated sleep mode
- ✓ThinQ app scheduling, energy monitoring, Alexa/Google control
- ✓10-year compressor warranty
- ✓4.6-star Walmart average from verified owners
- ✗83 lbs and very deep — bracket and a second person essentially mandatory
- ✗Needs 27+ inches of window width
- ✗ThinQ pairing and connectivity are recurring gripes
- ✗Some installs develop resonance hum or condensate gurgle
- ✗~$150 premium over fixed-speed 12K rivals