In a Room

The Set CFM Total->In a Room command is used to set the airflow values for the diffusers in a room. The recommended airflow values are based upon the heating and cooling loads specified in the room.

To set the total airflow in a room, go to

DM HVAC->Set CFM Total->In a Room

You will be prompted to select the room to set the total airflow in.

Specify point inside room:

After you select the room, the Set CFM Total in a Room dialog box will appear.

Set CFM Total in a Room Dialog Box

Set CFM total--In a Room dialog box

Room: The room name of the selected room.

Type: The room type of the selected room.

See the CFM Setting Adjustment Methods section for more information on the Average CFM in Diffusers and Prorate CFM in Diffusers fields.

Supply Air

Room Minimum CFM: The Minimum Supply Air for room specified in the room itself or the schedule. See the Rooms section for more information on setting this value.

Cooling CFM: The airflow required to cool the room based upon the cooling load. See the Cooling, Supply CFM value in the Print Supply Air Requirements section for more information.

Heating CFM: The airflow required to heat the room based upon the heating load. See the Heating, Supply CFM value in the Print Supply Air Requirements section for more information.

Required CFM: The airflow required in the room. It is the maximum of the Room Minimum CFM, Cooling CFM, and Heating CFM values.

Current CFM: The current supply airflow in the room. It is based upon the CFM values of the supply diffusers on the drawing that are in the room.

New CFM: The new supply airflow to be set in the room. The value will be distributed among the supply diffusers based upon whether Average CFM in Diffusers or Prorate CFM in Diffusers is selected.

Return / Exhaust Air

Current Return CFM: TThe current return airflow in the room. It is based upon the CFM values of the return diffusers on the drawing that are in the room.

New Return CFM: The new return airflow to be set in the room. The value will be distributed among the return diffusers based upon whether Average CFM in Diffusers or Prorate CFM in Diffusers is selected.

Current Exhaust CFM: The current exhaust airflow in the room. It is based upon the CFM values of the exhaust diffusers on the drawing that are in the room.

New Exhaust CFM: The new exhaust airflow to be set in the room. The value will be distributed among the exhaust diffusers based upon whether Average CFM in Diffusers or Prorate CFM in Diffusers is selected.

Setting the Total Airflow in a Room

When the values in the dialog box are set correctly, press OK. The new CFM values will be set in the diffusers in the room.


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