A Bosch 500 series dishwasher operates at 44 dBA, about the same volume as bird calls. The PrecisionWash system includes a flow-through water heater, precision spray arms, and smart sensors. The AutoAir feature automatically pops the door open at the end of the cycle, allowing dishes to dry faster and more thoroughly with fresh air. Every unit includes a full stainless tub and three racks, including an adjustable middle rack and an expandable top rack.