Define calculation and simulation settings for the project

Select the Project object on the Project Tree, and right click.
A pop-up menu appears.
Select Properties from the pop-up menu.
The Properties For: Project dialog box opens.
Under the Calculation settings heading, change the Room design temperatures property value from Air by selecting Resultant from the available drop-down list.
This will ensure the heat losses will be computed to maintain the specified room design temperature as a Resultant or comfort temperature (defined as 1/2 Air temperature and 1/2 Mean radiant temperature) during heat loss calculations.
Under the Calculation settings heading, change the Allow room temperatures to rise property value from No to Yes, enabling the Temperature rise property.
Enter a value of 2° Centigrade as an allowable temperature rise.

Note: The effect of permitting a swing of say 2° Celsius will give a different peak cooling load to that obtained by changing the inside design temperature by 2° Celsius as the mean temperature of the room in the two cases will be different.
Press the Apply button at the bottom of the dialog box.

Note: The calculation settings changes you just made result in a more precise set of calculations.

Continue working with the Properties For: Project dialog box by making some changes to the Simulation settings for the project.
Under the Simulation settings heading, change the Time Steps Per Hour property value from 6 by selecting 12 from the available drop-down list.
As with the changes made to the calculation settings, the effect is a more detailed simulation. Reducing the maximum number of concurrent simulations ensures the simulations do not consume too much computational power.
Press the OK button at the bottom of the dialog box.
This saves the changes and closes the Properties For: Project dialog box.