dhw_meter:
  sensor:
    - platform: integration
      unique_id: hot_water_meter
      name: hot_water_meter
      source: sensor.opentherm_dhw_flow_rate
      unit_time: min
      method: left
      round: 2

  homeassistant:
    customize:
      sensor.hot_water_meter:
        friendly_name: "Hot water"
        device_class: "water"
        icon: "mdi:water-pump"