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 Whirlpool FFB 8258 WV SP, Front-load, 17.6 lbs (8 kg), B, 79 dB, 1200 RPM, B Whirlpool FFB 8258 WV SP. Loading type: Front-load. Drum capacity: 17.6 lbs (8 kg), Spin-drying class: B, Noise level (spin): 79 dB, Maximum spin speed: 1200 RPM. Product color: White. Width: 23.4" (595 mm), Depth: 24.8" (630 mm), Height: 33.3" (845 mm). Energy efficiency class: B