A++ means that the product is rated in its category in terms of energy efficiency. The Energy Labeling system is based on EU Directive 2010/30/EU. A++ LG MU3M19, Air conditioner outdoor unit, White, Cooling, Dehumidifying, Heating, 5300 W, 1400 W, 6300 W LG MU3M19. Type: Air conditioner outdoor unit, Product color: White, Air conditioner functions: Cooling, Dehumidifying, Heating. Energy efficiency class (heating) (Warmer heating season): A+, Annual energy consumption (cooling): 258 kWh, Annual energy consumption (heating) (Warmer heating season): 1696 kWh. Outdoor unit noise level: 52 dB, Cooling airflow (outdoor unit): 3000 m³/h, Outdoor unit width: 34.3" (87 cm). Energy efficiency class (cooling): A++