Answer
In your Heating History, there are three types of graphs:
Usage Graph: Each of the blue bars shows your overall usage for that given time period. To the right of this graph, you will also see the max/min outdoor temperature for the time period. These are visible in the week/year view.
Active Heating & Indoor Temperature Graphs: Within day view, there are two graphs:
- Active Heating: The left-hand graph shows when your boiler fired up each day and for how long.
- Indoor Temperature: The right-hand graph plots out your indoor temperature throughout the day.