# Settings

<figure><img src="/files/hsqPqvwpIDlKOJocZjV7" alt=""><figcaption></figcaption></figure>

{% hint style="success" %}
To set Design Day Settings, navigate to 'Settings and left-click. Next, either accept the default settings or enter specific settings for Summer Design Days and Winter Design Days. Where multiple Design Days are required, locate the '+' icon and add as many Design Days as are required. Once complete, hit 'Update' and then Run 1 Simulation.&#x20;
{% endhint %}

## Summer and Winter Design Days

### Month

Specify the Month used in the simulation.

### Day of Month

Specify the Day of the Month used in the simulation.

### Max. Drybulb Temperature&#x20;

Specify the Max. Drybulb Temperature, the highest air temperature used in the simulation.

### Daily Drybulb Temperature

Specify the Daily Drybulb Temperature, the average air temperature over a day used in the simulation.

### Humidity Condition &#x20;

Specify the Humidity Condition, the state of air moisture content used in the simulation.

### Dew Point

Specify the Dew Point temperature at which air becomes saturated, forming dew, used in the simulation.

### Enthalpy

Specify Enthalpy, the total energy content of the air used in the simulation.

### Humidity Ratio

Specify the Humidity Ratio, the water vapour mass per unit of dry air used in the simulation.

### Wetbulb

Specify the Wetbulb temperature at which air is saturated with moisture used in the simulation.

### Wetbulb/Dewpoint at Max. Drybulb

Specify the Wetbulb/Dewpoint at Max. Drybulb: Moisture conditions at peak temperature used in the simulation.

### Solar Model Indicator

Specify the Solar Model Indicator, the method for simulating solar radiation used in the simulation.

**ASHRAE Clear Sky**: Clear sky solar radiation model by ASHRAE.

**ASHRAE Tau:** Specify ASHRAE Clear Sky: Clear sky solar radiation model by ASHRAE.

**ASHRAE Tau 2017:** Updated time constant as per 2017 guidelines.

**Zhang Huang:** Model for solar and daylighting analysis.

### Optical Depth of Beam Irradiance

Specify the Optical Depth of Beam Irradiance, the measure of beam radiation attenuation used in the simulation.

### Optical Depth of Diffuse Irradiance

Specify the Optical Depth of Diffuse Irradiance, the measure of diffuse radiation attenuation used in the simulation.

### Daylight Savings

Specify Daylight Savings, to include longer daylight in summer.

### Barometric Temerature

Specify the Barometric Temperature affecting barometric pressure used in the simulation.

### Wind Direction

Specify the Wind Direction from which the wind is blowing used in the simulation.

### Rain Indicator

Specify the Rain Indicator, the presence or absence of rain used in the simulation.

### Snow Indicator&#x20;

Specify the Snow Indicator, the presence or absence of snow used in the simulation.


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