Heating Design tab on Model Options dialog.
This series of options allows you control which 7/12 Schedules are switched on during Detailed HVAC heating autosizing. 7/12 Schedules are categorised using the following categories when using the End-use defaults option:
For example, occupancy gains should normally be excluded when sizing heating plant to ensure that the design heating plant meets all heating loads itself. So leave the Occupancy check box unchecked.
These options are also used for Typical workday schedules.
Important Note: Heating and
cooling demand schedules must be included to ensure the system operates,
so the Heating demand and Cooling demand options should normally left
selected.
The same principle applies to Heating design calculations (since they use Typical workday schedules behind the scenes), so if the Heating demand setting is unchecked, the Heating design calculations will run as if no heating has been selected.
Important Note: This system of categories can be confusing and so generally you are advised to use either the 2-Profiles 7/12 Schedules option where the schedule operation during heating and cooling are defined explicitly using a profile or use compact schedules where again heating and cooling design operation is defined explicitly.