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Change Connection Type

The Change Connection Type command is used to change the settings used when a diffuser connection is made. These settings only affect newly inserted diffuser connections. Diffuser connections made before the changes must be modified manually using the Query Duct or Edit Multiple Ducts commands.

These values can also be set in the Diffuser Connections options section.

To change the default settings for diffuser connections, go to
Ribbon: DM HVAC→Diffuser Connections→  Change Connection Type
Pulldown Menu: DM HVAC→Diffuser Connections→Change Connection Type

Default Diffuser Connection Settings Dialog Box​

The following options can be set for different types of diffusers based upon the Airflow ▾ setting of the diffuser.

  •  Ceiling Connection Type: ▾ The material type used for the duct when connecting to a floor or ceiling diffuser.

    •  Flexible Flexible ducts are used to connect to the diffuser. The length of flexible duct is limited by the Default flex length option. If the connection exceeds that length, hard duct is used for part of the connection. See the Diffuser Connections options section for more information.
    •  Hard Hard ducts are used to connect to the diffuser.

  •  Lock Ceiling Connection Shape ▾ Whether the ducts that are inserted as part of the diffuser connection have their shape locked.

    •  No The duct shapes are not locked. The duct shape will be set when the duct is sized.
    •  Round The duct shapes are locked as round.
    •  Rectangular The duct shapes are locked as rectangular.
    •  Flat Oval The duct shapes are locked as flat oval.

  •  Sidewall Connection Type ▾ The material type used for the duct when connecting to a sidewall diffuser.

    •  Flexible Flexible ducts are used to connect to the diffuser. The length of flexible duct is limited by the Default flex length option. If the connection exceeds that length, hard duct is used for part of the connection. See the Diffuser Connections options section for more information.
    •  Hard Hard ducts are used to connect to the diffuser.

  •  Balancing Dampers ▾ Whether a balancing damper is inserted in the duct connected to the diffuser.

    •  Yes A balancing damper is inserted.
    •  No A balancing damper is not inserted.
Related Options

Supply, Return, Exhaust, and Outside: Sets the defaults for each setting in this dialog box.