Determining the Area and Volume of Conditioned Space

Reference Number: KB-00898
Last Modified: July 16, 2015

The information in this article applies to:

Chief Architect Premier or Chief Architect Interiors


How do I determine the area and volume of a room's conditioned space?


Conditioned space is heated and cooled areas of the structure, and it is calculated in volume and area. Here is one procedure you can use to determine the area of conditioned space:   

To find the area of a room

  1. First, select the room you intend to measure with one left mouse click.   


  2. With the room selected, click the Make Room Polyline  edit button on the edit toolbar. A polyline that follows the inside surface of the room is created and is selected.

  3. With the polyline selected, click the Open Object  edit button.   

  4. On the Polyline panel of the Polyline Specification dialog, make a note of the Area (which is also the area of the room), and then click the Cancel button.



To find the volume of a room

  1. With the polyline still selected, click the Convert Polyline  edit button.   

  2. In the Convert Polyline dialog box, click the radio button beside Slab and then click OK.   


  3. On the General panel of the Slab Specification dialog, which opens next: 


    • In the Thickness field, enter the value of the ceiling height of the selected room.

    • For example, if the ceiling height of the room is 97 1/8", enter 97 1/8".

    • Press the Tab key on your keyboard to update the dialog without closing it.  

  4. Next, go to the Polyline panel and make a note of the Volume of the slab, (which is also the volume of the room).  


  5. When you have obtained the volume of the room, click the Cancel button. 

  6. With the slab still selected, click the Delete  edit button or press the Delete key on your keyboard to remove it from your model.

To set the energy values for wall types

  1. Select Build> Wall> Define Wall Types  from the menu.

  2. In the Wall Type Definitions dialog there is a section for Energy Values, which allows you to set:

    • Cavity R-Value 

    • Continuous R-Value

    • This information is used when exporting to REScheck.

To use a custom label macro

  1. Select Edit> Default Settings  from the menu, click on the arrow beside Rooms, highlight Room Label and click on the Edit button.

  2. In the Room Label Defaults dialog click Insert> Global> Room Info and select a room label macro that corresponds with the value you want to display, then click OK.