The LG S4-Q18KL28E is a wall mounted split air conditioner rated at 18,000 BTU, with 5,275W of cooling at its rated setting and up to 5,835W at maximum. It runs on a DUAL Inverter compressor, which varies its speed instead of switching fully on and off, and draws 1,640W at the rated cooling load, dropping to 300W at minimum.
Key Features
- Cools a large room. 18,000 BTU with 5,275W rated cooling capacity and a maximum of 5,835W, with Power Cooling for a faster pull down.
- Change the temperature from your phone. Wi-Fi is built in and works with LG ThinQ, so you can set the unit before you get home.
- Quiet enough to sleep through. Sound power measures 45, 40 and 37 dB(A) across the cooling speeds, with 5 fan steps plus a Natural setting.
- Cleaner air coming out of the vents. An allergy filter and a pre filter are both fitted, and Auto Cleaning dries the inside of the unit after use.
- Air goes where you want it. Comfort Air and 6 step up and down airflow control let you keep the draught off people sitting nearby.
- Comes back on by itself after an outage. Auto Restart returns to your last setting, and Smart Diagnosis helps a technician find faults quickly.
- Takes the damp out of the air. A dedicated dehumidification mode runs without over cooling the room.

The indoor unit measures 998 x 345 x 210 mm and weighs 11 kg. The matching outdoor unit, model S4UQ18KL28E.ACWGEAF, measures 770 x 545 x 288 mm and weighs 29 kg. The system uses R410A refrigerant and runs on 230V, 50Hz. A remote controller is included, along with a 24 hour on/off timer.



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