Exposing Rinnai water heater integrations to Google Home and Siri

I expose the integration to Google Home like:

    name: 'Water heater'

And to HomeKit/Siri:

    - water_heater.my_water_heater

Siri will accept/execute

Hey Siri, set water heater to 125 degrees

Google Home responds to

Ok google, set water heater to 125 degrees


Sorry I don’t understand.

Seems to me that Google doesn’t know what to do with the integration. Is this a problem with the integration?

Does anyone know how to use GH to verbally execute a script with a parameter? That could be a workaround.

I’m still stuck with this. Could the problem be that you can’t pass a “water_heater” to Google?