HVAC options
- Last UpdatedAug 13, 2025
- 3 minute read
Select HVAC from the Drawing Type drop-down list to display the HVAC version of the Elevation Tag Defaults window.

The Symbolic Template to be used must be selected, the settings are stored in the defaults file DRA-ISO-ELEV-TAG.
Input the required name in the Template field or click the magnifying glass adjacent to the Template field to display the Browse window.
The Browse window is populated with the available registries by database. From the Look in drop-down menu, select the required database. You must now select the registry that is used to hold the drawing.
Click Use to select the new registry or click Cancel to discard any changes and close the Browse window.
To set the drafting intelligent hash code string that extracts the elevation values from the 3D design database, input the hash code in the Code field.
The default symbolic template has a single text string that is set to #ATEX<FR SLAB>. The symbolic label (SLAB) that is created on the drawing has the ATEX attribute set to the hash code specified in this field and is expanded automatically.
The reason for this is to allow you to change the connection point of the label. If this were to change then so must the hash code to make sure the correct elevation value is extracted.
IsoADP replaces the word P3 in the hash code string with the relevant P‑point number specified in the Connection Points part of the window. Consequently P3 must always be included in any hash code string, if the correct value is to appear in the label.
From the Text Pen drop-down menu, select a colour for the Text that appears in the selected template. The Label attribute is set to TXCOLOUR.
From the Text Height drop-down menu, select a character height for Text that appears in the selected template.The Label attribute is set to CHEI.
A colour, line thickness and line style for the Frame and the Leader-line must now be selected. Select a colour from the Frame Pen drop-down menu and a line thickness and style. The Label attributes are set to LLCOLOUR, LFCOLOUR, LLSTYLE and LFSTYLE.
A default offset position from the label connection at the design element must be selected.
Input the coordinates in the Offset fields. The label attribute is set to XYPO.
Some components require a different design connection Ppoint for locating the label and extracting the elevation. For a BEND, BRCO or TEE and any sub-elements, input the Ppoint to use. Always include the number in the format P<value>.
To tag a component that appears in a vertical leg, select the Tag in the vertical check box. The Ppoint used to tag these components can be changed by setting the value that appears in the on field.
Click Close to close the Elevation Tag Defaults window, if changes have not been made.
Click Reset to revert to the settings applied when the Elevation Tag Defaults window was opened. A Confirm window displays asking you to OK the cancellation of changes. Click Yes to discard the changes.
Click Save to apply the elevation tag defaults. A Confirm window displays asking you to OK the changes. Click Yes to save the changes. Click Close to close the Elevation Tag Defaults window.
Click Cancel to discard any changes and close the Elevation Tag Defaults window. A Confirm window displays asking you to OK the cancellation. Click No to discard any changes and close the Elevation Tag Defaults window.