On the Tree View you will see a Heating Design Data folder. This topic describes the information given on the right-hand side of the screen when you expand this folder and then select a heating design day. The screen provides a summary of the heating design day that you've selected in the Tree View.
Name - the name of the selected heating design day.
First Year Day - the year day of the first design day for the selected heating design day.
Number of Design Days - the number of design days of the selected heating design day.