LG Dual Inverter 8,500 BTU vs Friedrich Kuhl 8,000 BTU
Quick take: The LG Dual Inverter 8,500 BTU costs $590 less; the LG Dual Inverter 8,500 BTU has an inverter compressor that throttles smoothly while the Friedrich Kuhl 8,000 BTU blast-cycles on and off; the LG Dual Inverter 8,500 BTU is the more efficient unit (15 CEER).
| Spec | LG Dual Inverter 8,500 BTU | Friedrich Kuhl 8,000 BTU |
|---|---|---|
| Price | $459 | $1,049 |
| Rating | 4.4★ (73) | — |
| Type | Window | Window |
| Capacity (ASHRAE) | 8.5k BTU | 8k BTU |
| SACC (delivered) | — | — |
| Coverage | ~380 sq ft | ~350 sq ft |
| Noise (lowest) | 44 dB | — |
| CEER (efficiency) | 15 | 12 |
| Compressor | Inverter (variable) | Fixed speed |
| Heating | — | — |
| Window Fit | 27–42 in | 26–40 in |
| Voltage | 115V | 115V |
| Weight | 83 lbs | 72 lbs |
| WiFi Control | Built-in | Built-in |
| Install | Do not attempt this one alone: the inverter chassis weighs about 83 pounds and is nearly 29 inches deep, so most of the mass hangs outside the window. A support bracket is strongly recommended (and required by code in NYC-style installs), and two people make the lift safe. It needs a wider window than most 8K units — roughly 27 to 42 inches — plus about 16 inches of sash height. Budget an hour, and note the deep cabinet can block outward-opening screens. | The Kuhl installs like the commercial unit it is: a heavy-gauge steel sleeve mounts in the window (26 to 40 inches wide) or through the wall first, then the 72-pound chassis slides in from inside — safer than balancing a whole unit on a sill, but definitely a two-person job. Friedrich ships real heavy-duty mounting hardware rather than plastic curtains, and the slide-out chassis means future service doesn't require de-installing the sleeve. Plan a half day for a first-time install and check that deep sills can take the 21-plus inches of cabinet depth. |
| Warranty | 1-year parts & labor; 10-year warranty on the dual inverter compressor | 1-year parts & labor; years 2–5 sealed refrigeration system |
Pros & cons
LG Dual Inverter 8,500 BTU
- ✓Dual inverter compressor ramps instead of cycling — no on/off thunk
- ✓Published operation as low as 44 dB
- ✓CEER 15.0 cuts energy use up to 35% vs conventional units
- ✓Holds set temperature within about 1 degree
- ✓ThinQ app with energy monitoring, Alexa and Google voice control
- ✓8,500 BTU covers up to 380 sq ft — more headroom than rival 8Ks
- ✓10-year compressor warranty backs the inverter hardware
- ✓4-way air deflection spreads air well in wide rooms
- ✗83 lbs and 28.75 in deep — a two-person install that wants a bracket
- ✗Needs a window at least ~27 in wide; won't fit narrow openings
- ✗ThinQ app is clunky, with login and connectivity complaints
- ✗Some units develop a low-frequency hum at mid compressor speeds
- ✗$150+ premium over budget 8K units
- ✗Condensate gurgle noises reported in humid climates
Friedrich Kuhl 8,000 BTU
- ✓Commercial-grade construction with steel inner wall and dense insulation
- ✓Slide-out chassis allows service without removing the sleeve
- ✓QuietMaster damping — up to 45% quieter operation, per Friedrich
- ✓Eight-way airflow control aims air precisely
- ✓Real scheduling, panel lockout, and fresh-air vent controls
- ✓5-year sealed-system warranty and long parts support
- ✓Window and through-wall capable from the same unit
- ✓Documented 10-15 year service lives in owner reports
- ✗~$1,049 — more than double an equivalent inverter unit
- ✗CEER 12.0 trails the 15.0 of modern inverters, so it costs more to run
- ✗Fixed-speed compressor cycles audibly despite the damping
- ✗FriedrichGo app is the weak point of a premium package
- ✗Needs 26+ inches of window width and deep sill clearance
- ✗Few retail reviews — you're trusting the trade's word