D 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. D Siemens iQ300 SN63HX55BE, Fully built-in, Full size (60 cm), Black, Black, Buttons, 68.9" (1.75 m) Siemens iQ300 SN63HX55BE. Appliance placement: Fully built-in, Product size: Full size (60 cm), Door color: Black. Number of place settings: 13 place settings, Noise emission class: C, Noise level: 46 dB. Apps supported: Siemens Home Connect. Energy efficiency class: D, Water consumption per cycle: 9.5 L, Energy consumption per 100 cycles: 84 kWh. Width: 23.5" (598 mm), Depth: 21.7" (550 mm), Height: 34.1" (865 mm)