F 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. F Blomberg SST3455i, 309 L, SN-T, 36 dB, F, White Blomberg SST3455i. Fridge net capacity: 309 L, Climate class: SN-T, Noise level: 36 dB. Display type: LED, Fridge number of shelves/baskets: 5, Number of vegetable drawers: 2, Door hinge: Slide-out. Annual energy consumption: 142 kWh, Energy efficiency class: F. Weight: 121.3 lbs (55 kg). Product color: White