Cumulative Gas Use is too high

[gardiner4]

My NaviLink shows Total Gas Usage as 230 therms, but Cumulative Gas Use in this integration reports 22,407.2 ft³. Yesterday the app says I used .3 therms, but the Cumulative Gas Use increased 183.6 ft³. I think a unit conversion is off. This is a NPE-240 in the US.

[nikshriv]

I have been using the old conversion factor from the prior version, assuming that it wouldn't change. I'll take a closer look at it this weekend and update. Thanks

[wisem2540]

FYI this appears to be broken. Can you share your conversion so we can at least adjust the sensor?

[gardiner4]

Here is the conversion from /navien_water_heater/sensor.py. My unit is offline right now, but if the unit is reporting cubic feet you might just have to divide by 35.3147.

"accumulatedGasUsage": GenericSensorDescription(
state_class = SensorStateClass.TOTAL_INCREASING,
native_unit_of_measurement=VOLUME_CUBIC_METERS if hass_units == "metric" else VOLUME_CUBIC_FEET,
name="Cumulative Gas Use",
conversion_factor = 1 if hass_units == navien_units else 35.3147 if hass_units == "us_customary" else 0.0283168732,
device_class=SensorDeviceClass.GAS

[gardiner4]

So the Navien App has a lifetime count of therms. This integration reports in cubic feet. My natural gas provider National Grid calculates the bill using ccf which is a hundred cubic feet. I am now using a template to do the approximate conversion to ccf.

sensor:

• platform: template
  sensors:
  gas_usage_ccf:
  friendly_name: "Gas Usage in CCF"
  unit_of_measurement: 'CCF'
  device_class: 'gas'
  value_template: "{{ (states('sensor.ch1_unit1_cumulative_gas_use') | float) / 100 }}"
  attribute_templates:
  state_class: "total"