LG Air Conditioner 4-way Cassette LG dual split 9000+24000 BTU inverter A+++ external unit 6.15 kWLG Air Conditioner 4 way Cassette LG dual split 9000+24000 BTU inverter A+++ external unit 6. 15 kW The air conditioner kit is equipped with the following indoor units: 1 x 9000 BTU Ideal for rooms from 15 to 25 sqm with an average height of 2. 7 m 1 x 24000 BTU Ideal for rooms from 80 to 100 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