Configuration of sensor

[kasperk]

Hi,

I am trying to configure a sensor that shall show the heat exchange efficiency calculated from 3 other sensors in my HVAC system.

Cant quite figure out what to do. I have posted device class as humidity due to that also beein presented as %.

Can anyone help, thanks

template:

• sensor:

  • name: “heat exchange efficiency”
    unit_of_measurement: “%”
    state: >
    {% set outdoor = states(‘sensor.outdoor_temperature’) | float %}
    {% set inlet = states(‘sensor.inlet_temperature’) | float %}
    {% set exhaust = states(‘sensor.exhaust_temperature’) | float %}

    {{ ((inlet + outdoor) / (exhaust + outdoor)) | round(1, default=0) }}
    

    

[Didgeridrew]

When setting up a Template helper, only the state template goes in the “State template” field. That field cannot understand all the YAML configuration you have included as anything but strings and sensors with a defined unit of measurement must return a numeric value.

Remove everything from template: to state: >.

[kasperk]

Thanks, that sure did help