LG Air Conditioner 4-way Cassette LG dual split 12000+18000 BTU inverter A+++ external unit 5.3 kWLG Air Conditioner 4 way Cassette LG dual split 12000+18000 BTU inverter A+++ external unit 5. 3 kW The air conditioner kit is equipped with the following indoor units: 1 x 12000 BTU Ideal for rooms from 25 to 40 sqm with an average height of 2. 7 m 1 x 18000 BTU Ideal for rooms from 50 to 60 sqm with an average height of 2. 7 m The LG 4 Way Cassette air conditioner is the ideal solution for medium to large commercial and residential spaces, where