The unit measurement need to be either "L/min" or "m³/h":
Error 'The unit of measurement l/h is not valid together with device class `volume_flow_rate' when processing MQTT discovery message topic:
'homeassistant/sensor/eas_hmu_BuildingCircuitFlow_value message: '{'step': 1, 'value_template':
'{{value_json["value"]}}', 'unit_of_measurement': 'I/h',
'state_class': 'measurement', 'min': 0, 'device_class':
'volume_flow_rate', 'device': {'via_device': 'eas',
'manufacturer': 'ebusd.eu', 'suggested_area': 'Heating',
'identifiers': 'eas_hmu', 'name': 'eas hmu',
'configuration_url': 'http://192.168.101.52/#/msg?
q=hmu'}, 'max': 65534, 'unique_id':
'eas_hmu_BuildingCircuitFlow_value', 'name':
'BuildingCircuitFlow', 'state_topic':
'eas/hmu/BuildingCircuitFlow'}'
The unit measurement need to be either "L/min" or "m³/h":
Error 'The unit of measurement l/h is not valid together with device class `volume_flow_rate' when processing MQTT discovery message topic:
'homeassistant/sensor/eas_hmu_BuildingCircuitFlow_value message: '{'step': 1, 'value_template':
'{{value_json["value"]}}', 'unit_of_measurement': 'I/h',
'state_class': 'measurement', 'min': 0, 'device_class':
'volume_flow_rate', 'device': {'via_device': 'eas',
'manufacturer': 'ebusd.eu', 'suggested_area': 'Heating',
'identifiers': 'eas_hmu', 'name': 'eas hmu',
'configuration_url': 'http://192.168.101.52/#/msg?
q=hmu'}, 'max': 65534, 'unique_id':
'eas_hmu_BuildingCircuitFlow_value', 'name':
'BuildingCircuitFlow', 'state_topic':
'eas/hmu/BuildingCircuitFlow'}'