Thanks to @Danielhiversen and @brg468. You guys are genius’s. Never used templates before, so this was new to me. Following documentation and threads helped:
https://www.home-assistant.io/integrations/template/
How to display template sensor attributes in HA home page?
The final solution ended up like this and could then be referenced like: sensor.office_temperature:
- platform: template
sensors:
office_temperature:
entity_id: climate.kontor
friendly_name: "Office temperature"
unit_of_measurement: 'degrees'
value_template: "{{state_attr('climate.kontor', 'current_temperature') }}"