B means that the product is rated in its category in terms of energy efficiency. The Energy Labeling system is based on EU Regulation 2017/1369/EU. B LG F4WV5009S0W, Front-load, 19.8 lbs (9 kg), B, 72 dB, 1360 RPM, B LG F4WV5009S0W. Loading type: Front-load. Drum capacity: 19.8 lbs (9 kg), Spin-drying class: B, Noise level (spin): 72 dB, Noise level (wash): 54 dB, Maximum spin speed: 1360 RPM. Product color: White. Width: 23.6" (600 mm), Depth: 22" (560 mm), Height: 33.5" (850 mm). Energy efficiency class: B