Use the MEP Sizing Calculator

Use the MEP Sizing Calculator to define sizing criteria and design constraints for selected duct. Apply filters to generate a table of duct sizes that satisfy the specified velocity, friction, and capacity requirements.

The MEP Sizing Calculator eliminates the need to use external sizing tools during preliminary design, including physical ones, like the Ductulator.

1. Select ductwork in the model.
2. Click View tabWindows panelUser Interface drop-downMEP Sizing Calculator.

   The MEP Sizing palette opens and the shape of the selected duct is shown at the top.

Sizing Method

3. Specify whether Volumetric Flow is calculated based on the selected duct or user defined.
4. Use the check boxes to size duct by Friction, Velocity, Aspect Ratio, or a combination of these. Use the sliders to specify a tolerance.
5. Specify whether Roughness is from the selected duct or user defined.

Constraints

6. Specify options for filtering the results in the table by minimum and maximum values for height and width for rectangular and oval duct or inner diameter for round duct.
7. Enable the Show Best Sizes checkbox to filter the smallest height and width while still fulfilling sizing method inputs.

   Sizes that meet the sizing requirements are listed in the table.

   Click the Swap Height and Width button to swap the values for height and width displayed in the table. Click the arrow on the right of each column heading to sort the entries in the column in ascending or descending order.

8. Select a size and click Apply to resize the selected duct.