Sensor for if either of two Hive thermostats are set to ON

Hi All,

Firstly, I’m brand new to Home Assistant (installed last week but wanted to get it up and running for a lifetime!) so forgive the newbie-ness of the below.

I’m trying to create a sensor (if that’s the right thing) to track when my Hive heating is in the state ON.
The difficulty I’m having is that I have a split zone heating system (Upstairs / Downstairs).
So I am trying to create a sensor along the lines of:
IF
sensor.upstairs_mode = “ON”
OR
sensor.downstairs_mode = “ON”
THEN “ON”

This is so that I can graph when either upstairs OR downstairs is on in a single sensor (as if either of them are on - I’m using my heating) and then track Today’s time on, This week’s time on etc.

I’m struggling to understand how to do this.
I managed to use the template developer tool and get the below which gives me a number of any that are ON, but that’s not exactly how I want it I don’t think:
{{ ['sensor.upstairs_state', 'sensor.downstairs_state'] | map('states') | select('eq', 'ON') | list | count }}

Any help would be appreciated!
Thank you!

{{ ['sensor.upstairs_state', 'sensor.downstairs_state'] 
| select('is_state', 'ON') | list | count > 0 }}