B 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. B Samsung NK36M7070VS, 729 m³/h, Ducted, B, A, D, 68 dB Samsung NK36M7070VS. Maximum extraction power: 729 m³/h, Type of extraction: Ducted, Fluid dynamic efficiency class: B. Type: Wall-mounted, Product color: Silver, Exhaust location: Top. Grease filter type: Aluminum, Number of filters: 2 pc(s). Bulb power: 2.5 W, Number of bulbs: 2 bulb(s), Bulb type: LED. Energy efficiency class: B, Annual energy consumption: 84.2 kWh, Energy efficiency scale: A++ to E