Download HVAC Plan template for Visio 2010 from Official Mar 13, 2012This sample diagram was generated from the HVAC template and features intelligent shapes that enable the user to easily drag/drop duct shapes that automatically orient and connect at correct angles. Create an HVAC plan in Visio - supportce Start an HVAC plan in one of the following ways: As a new drawing. In the Maps and Floor Plans template or category, click HVAC Plan > Create. By default, this drawing type opens a scaled drawing page in landscape orientation . You can change page, ruler and grid settings at any time. As a layer in a CAD floor plan. Create a new HVAC Plan drawing. Follow the step in the previous section to do that.