7.2.3 Glazing Analysis Tool

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The Glazing Analysis Tool provides detailed analysis of curtain panels where there are sub-panels or several materials in the panel family.   This Tool is suitable for Revit versions of 2019 and later as the libraries and classes required for functionality are not present in earlier versions.

FenestraPro’s Glazing Analysis Tool can query curtain wall panels to find dependant elements’ geometry and materials.

You are provided with a list of families in the model and may then assign a category for each material and assign a U-Value or R-Value. This information may then be passed back to FenestraPro for Revit to be included into the breakdown details for glazing elements. These properties will then affect the results for Solar Loads and Overall R-value/U-Value. The data may then be exported to a CSV file for review.

Each curtain wall will have a CSV file with a breakdown of all panels within. An overview CSV file contains the Revit ID’s for each curtain wall as well as the panel and sub-panel Revit ID’s for reference.

Units will display automatically appropriate for your model (metric or imperial).

Glazing Tool for Nested Panels

1. Open the Glazing Analysis Tool from the Add-Ins Menu in Revit.

2. The Add-in opens with the first window, curtain wall panel or sub panel details displayed.

3. The Glazing Tool displays several levels of information as well as highlighting on the model:

  1. Window instances present
  2. Curtain walls present
  3. Curtain wall panel instances
  4. Curtain wall panels’ sub panel list
  5. Breakdown information for the selected glazed unit
  6. Material categorization and U/R-Value input area
  7. Export results to CSV format
  8. Overall progress, showing family types where materials have been categorized and U/R-Values assigned
  9. Revit’s 3D view, with the current glazed unit selected for context

4. Categorize all materials for the family types.

a) Select a panel from the ‘Panel List’

b) Select a category for the material

Note: Materials marked as None or Excluded will be excluded from calculations

5. Update the U/R-Values for each material by clicking on Refresh Zones

  1. The performance zones making up each exposed panel face are calculated and displayed.
  2.  Click ‘Refresh Zones‘ for any changes to material’s category or performance.
  3.  Once complete, the Overall Progress will be updated, marking that family type as complete and showing a progress indication to the user.
  4.  The overall U-Value is now calculated for the glazed unit.

6. Update Solar Heat Gain Coefficients (1) and Visual Light Transmittance (2) values for the panel. This data may be sent to FenestraPro for Revit by exporting the CSV file.

7. Assign Performance values to zones – Exposed Face Overview

The curtain wall panel is divided into exposed faces based on the exposed, exterior panel geometry.

The selected exposed face shown is made up of material ’00-GL01′

The exposed face has 2 performance zones:

  1. 00-GL01

In effect this means that there is no other geometry behind the exposed face of this material. In this case the material is glazed, so it’s a vision panel.

  1. Insulation

This means that there is material geometry behind the exposed face. In this case, there is an insulated panel behind the glazing material.

8. Update Performance Zones

          1. Select the performance zone to update by clicking on the grey buttons (in this case – Spandrel/00 – GL01/Insulation etc)
          2. The center-of-panel U-factor is converted from the material’s R-value.   Note: Changes will update the material for all family instances using that material
          3. ‘Top’, ‘Left’, ‘Right’ and ‘Bottom’ can be used to describe the relationship to neighboring zones.
          4. The default relationship is None – this has no impact on calculations
          5. Set the relationships be selecting them from the corresponding drop-down list of performance zones found in the exposed face
          6. Edge-of-panel U-factor can be updated as necessary
          7. Click ‘Save’ to exit and update the panel’s performance.

          9. Populate Curtain Walls

          Update all panels for curtain walls to get curtain wall results

          Note: Only populated curtain walls will be exported. Panel U-values for use with FenestraPro for Revit will also only be exported from populated curtain walls

          1. Once materials have been categorized and R-values / U-values have been assigned for all panels in the curtain wall, the curtain wall can be analysed
          2. Select the curtain wall from the list.
          3. a. Populate from overview or
            b. Populate by right-clicking the curtain wall
          4. The populated curtain wall is now shown in bold type
          5. Curtain wall performance is calculated and shown in the overview panel
          6. Curtain wall grid frame R-value (imperial) or U-value (metric) can be input here

          10. Curtain Walls that have been populated in error can be cleared

          1. Select the curtain wall from the list
            1. Right-click on the curtain wall panel and select ‘Clear
          2. The Curtain Wall will shown in normal typeface and is no longer added the curtain wall export list.

          11. Export to a CSV file

          Click on the Export to CSV button

          Windows: All windows are exported to a CSV file for information purposes. Note: Window u-value results are not however sent for use by FenestraPro for Revit

          Curtain Walls: All populated curtain walls will be exported to a CSV file

          Files created are as follows:

          a) a curtain wall overview CSV file
          b) a file for each populated Curtain Wall

          Note: Populated curtain wall panel results are saved for use by FenestraPro for Revit

          Open MS Excel or similar application, go to the Data tab and click the ‘From Text/CSV‘ button


    CSV File exported from the Glazing Tool

    The CSV files are in your FenestraPro local folder under the model name along with a numeric string.

    For example: ‘C:\Users\YourName\AppData\Local\FenestraPro\TEST MODEL -123′

                1. Select a file in the list to import
                2. From the pop-up window that opens, select ‘Edit’ (1 in the image)

    Click the ‘Use First Row as Headers’ twice, so that the numbers are imported as numbers and not text.

    Click on Close & Load

    12. Use outputted results in FenestraPro for Revit

    (a) Exporting data from the Add-in also creates a local file
    (b) FenestraPro for Revit will monitor this location and if there is a saved file found for that model, FenestraPro for Revit  will load the calculated overall U-Value results and use them for its analytical calculations.
    (c) In the Settings of FenestraPro for Revit (under the Detailed Models Tab), please make sure that the option Read cached U-Factor, SHGC and VLT from Glazing App is checked. If this is not checked, FenestraPro for Revit will read the parameters of the panel families. Note: that access to these parameters may not always be successful due to the various limitations of nested components.

    Option in Settings to identify changes made using the Glazing Tool


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