C 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. C Electrolux LFT429X, 600 m³/h, Ducted, D, A, C, 68 dB Electrolux LFT429X. Maximum extraction power: 600 m³/h, Type of extraction: Ducted, Fluid dynamic efficiency class: D. Type: Wall-mounted, Product color: Black, Control type: Buttons. Grease filter type: Aluminum/Carbon, Number of filters: 3 pc(s). Bulb power: 3.15 W, Number of bulbs: 2 bulb(s), Bulb type: LED. Energy efficiency class: C, Annual energy consumption: 97.4 kWh, Energy efficiency scale: A+++ to D