AftabRad Revit Add-in -> Export To Radiance -> Type of Sky/Analysis: Exposure2sunlight (EN 17037)

In the Daylight in Building EN-17037 European Standard, there are four different criteria that are discussed and asked to fulfill. One of these four is Exposure to sunlight.

In the 5.3.2 Criteria for exposure to sunlight and A.4 Recommendation for exposure to sunlight in the standard document, it mentions that:

The recommendation is that a space should receive possible sunlight for a duration according to the Table A.6 (supposed to be cloudless) on a selected date between February 1st and March 21^st.

Therefore, to do the analysis we should do the following steps.

1- To find the exterior windows, this plugin uses two rules. The first rule to define any doors, windows, or curtain walls as exterior fenestration, is to find anyone that is only connected to one Revit room.

However, if there are any doors or windows that are placed in the exterior walls, but are connected to two rooms (for example in the below image, you can see that the balconies are defined as rooms), then we should use the second rule.

In the second rule, any fenestration that has its afb exterior Windows parameter checked is defined as exterior doors, windows, or curtain walls. Whenever you open any of the Aftabrad commands, this parameter is added to all fenestrations.

2- Press ExportToRadiance button in the AftabRad Add-in

3- Select Export2sunlight (EN 17037) in the Type of Sky/Analysis

4- Press Do Export2Radiance button

5- Then, you need to wait until the calculation is finished.

6- Now, it is time to import the calculation data into Revit. Therefore, the next step is to press the importToRevit Button.

7- In the Data2Revit page, if the Import button is enabled, then the full name of the dat file that is shown in the textbox below the Open Dat File button is porbably right.

Otherwise, you need to press the Open Dat File button, choose the right dat file.

8- Select the Exposure to Sunlight under the Calculation Type.

9- Press Import.

Troubleshooting:

If you see some windows are missing, you can do the following steps instead for this missing parts:

1- Start to place the sensor-girds family and place it in a relevant height on each missing windows glasses and change its height to a minimum value like 5mm

(to know more about how to place sensor grids you can check this link: https://www.aftabsoft.net/AftabRadTutorial/CreateCalculationPointsFile.htm)

2- Then, by activating the By Sensor Elements in Revit checkbox on the Calculation Points Creation page, pressing the OK button, we can create daylight calculation points on the right positions on the windows surfaces.

3- Next step is to activate the Point-Based Calculation Settings and select the One Day Sunlight Hours, and finally we should press the Do Export2Radiance button.

4- Now, it is time to import the calculation data into Revit. Therefore, the next step is to press the importToRevit Button.

5- In the Data2Revit page, if the Import button is enabled, then the full name of the dat file that is shown in the textbox below the Open Dat File button is porbably right.

Otherwise, you need to press the Open Dat File button, choose the right dat file.

6- Select the Sunlight Hours under the Calculation Type.

7- Press Import.