7.1 Performance for Detailed Models

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This is similar to the interface for Conceptual Masses (please refer to Section 6.1 above).  Performance for Detailed models displays average values for elements in the Revit model.

Create a Code/Building Standard with values for element categories such as Floor, Roof, Wall and Glazing.  Element properties in the model will then be compared to these and compliance will be indicated.

Performance values that are displayed are directly from the Revit model and (unlike Conceptual Mass Models) may not be edited.  Glazing Percentages display the actual Glass to Wall ratio in the model.

Value in the upper panel (1) shows the recommended Code figure. Value in the lower panel (2) shows the current average element property in the model

As shown in the image above, the Code value that has been set will display in the upper panel (1). The current average thermal properties for these elements in the model will display in the lower panel (2).

Detailed Revit models have element families for roofs, floors, walls and glazing.  These may be assigned thermal properties in Revit and these will display in Performance These values are compared to the selected Building Code that has been set and compliance or non-compliance is indicated.

Note: If some glazing does not have thermal properties assigned, it will not be included and the glazing percentage may appear lower than the actual value in the model.

Performance for Detailed Models also does not have the ‘Set to maximum percentage glazing’ button that is available for Mass Models. This button is appropriate for Mass Models only as glazing areas on the model may be adjusted using this function.

Note: If there are several types of roofs in the model with different thermal properties, the average value for all types in the model will be displayed.  Similarly, for floors, walls and glazing elements, a weighted average of all families (based on area) will be displayed.  Thermal properties may be assigned to elements by using Edit Type in Revit to adjust the assembly and materials.

                                             When an element has no thermal properties assigned this is indicated in the Performance tab

Element values will be compared to values set in the Building Code selected and whether the existing thermal properties comply or not will be indicated.  Values will display in red if they are non-compliant.

                                                               Hovering over the red asterisk will indicate which Revit family has properties that are unexpectedly low or high

Imperial Models will have properties in R-values for solid elements (roofs, floors and walls) and in imperial U-values for glazing elements. Metric models will use metric U-values for properties.  It is not necessary to set units as these will be read automatically from the Revit model.

If thermal properties of elements need to be assigned or adjusted, this may be done in Revit using Edit Type. By going into the Structure of an element (Roof/Floor or Wall), the assembly layers may be built up with a substrate, insulation and other components.  Each of these should have a material assigned. You may do this by entering the Materials Browser area of Revit and assigning a material from the list. As you build up the layers of the element with materials and thicknesses, the thermal properties will populate.  The application will read these from Revit.  You may need to add the Thermal Tab to the Materials Browser if it is not displayed, and assign a suitable material.

You may bypass this if you wish and proceed to review Solar Loads and Daylight.  Note that the thermal properties of these elements may show warnings in the Performance Manager if they are not assigned but this will not prevent you from getting results for Solar Loads or Daylight in the application and you may return to this later or when more specifications are available for your project.  Materials only need to be assigned for envelope elements in the project (Roof/Floor/Walls and Glazing).

For glazing, a Guardian glazing type may be chosen from the list in Revit.  Alternatively, the Glass Database  may be used to select a glazing type and be assigned to the element (window or curtain panel).

Please see Section 7.3 below for details on using the Glass Database.  For solid elements such as roofs, floors and walls, you may use Edit Type in Revit and adjust the element layers and materials to build up a thermal performance.

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