Integrated washer dryer energy rating b capacity 7 kg dry capacity 4 kg household size medium household 3 4 persons energy consumption washing 127 kwh energy consumption washing drying 481 kwh water consumption washing 45 litres water consumption washing drying 79 litres annual energy consumption washing 204 kwhyear annual water consumption washing drying 11 480 litres spin speed rpm 1 400 rpm spin efficiency b wash efficiency rati