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Set CFM Total In Multiple Diffusers

The Set CFM Total In Multiple Diffusers command is used to set the total airflow through a selected set of diffusers.

To set the total airflow of multiple diffusers on the drawing, go to
Ribbon: DM HVAC→Diffusers→  Set CFM Total In Multiple Diffusers
Pulldown Menu: DM HVAC→Set CFM Total→In Multiple Diffusers

You will be prompted to select the diffusers for which the total airflow is to be set.

Select objects:

The Set CFM Total in Multiple Diffusers dialog box will appear.

Set CFM Total in Multiple Diffusers Dialog Box​

  •  Old CFM: The current airflow through the diffusers.

  •  New CFM: The new airflow for the diffusers.

See the CFM Setting Adjustment Methods section for more information about the 🔘 Average CFM in Diffusers and 🔘 Prorate CFM in Diffusers settings.

Setting the Total Airflow in Multiple Diffusers​

When the values in the dialog box are set correctly, press the button. The new CFM value will be set in the selected diffusers.