Gas Flow esphome sensor

substitutions:
  gas_flow: 1.159
sensor:
  - platform: template
    name: "Gas Flow Rate m3"
    id: "viessmann_gas_flow_rate_m3"
    unit_of_measurement: "m³/h"
    state_class: "measurement"
    device_class: "volume_flow_rate"
    icon: "mdi:gas-burner"
    accuracy_decimals: 2
    force_update: true
    lambda: return (${gas_flow} * 3.6 * id(burner_performance).state) / 100 ;
    update_interval: 60s