JavaScript must be enabled in order to use this site.Please enable JavaScript in your browser and refresh the page. HVAC Supports Used to place supports for HVAC duct. Accessed from the Supports Ribbon: The following gallery displays which can be left floating or docked to the drawing area. Two types of supports are available: Straps Supports Trapeze Supports HVAC Support Placement Dialogs HVAC Support Placement Parent topic: Support Galleries