Resizing the mechanical equipment

Any referenced datasets can be downloaded from "Module downloads" in the module overview.

Resizing the mechanical equipment - Exercise

  1. Open the file, Medical Center Analysis Refining 03.rvt.
  2. To help in resizing your mechanical equipment, we need to compare the total "Calculated" and "Actual" airflows to the units "Maximum Allowable CFM" type parameter.
  3. Open the Space schedule and make a note the totals for Calculated and Actual Supply Airflow.



  4. They equal 1775 and 1044 cfm respectively.
  5. Open the mechanical equipment schedule and note the "Maximum Allowable CFM" for the current unit.



  6. Go to the 01 Ground Floor HVAC floor plan and select the air handling unit.
  7. Zoom in to your scope of work area.
  8. Select the AHU for that zone.
  9. Go to your Properties tab and select Edit Type.
  10. Scroll down to the Mechanical – Flow category.
  11. Make note of the current value.
  12. The "Maximum Allowable CFM" is not enough to supply the zone and its spaces.



  13. Click OK to continue.
  14. Drop down your type selector and choose Unit Size 54.



  15. Select Edit Type.
  16. Note the Max Allowable CFM value is set to 2000 cfm.



  17. Click OK to continue back to the view.
  18. Review the mechanical schedule to make sure the Maximum Airflow CFM has changed.



  19. Save the project.