Create a schedule of VAV boxes, similar to the diffuser schedule.

Specify the exhaust air requirements for rooms and use these numbers in the load calculations and duct design calculations.

Have the option to insert diffusers at the corner of the diffuser, not the center. This change would assist in placing diffusers properly in ceiling grids.

Insert the load calculation schedules on the drawing.

Be able to export building load information to eQuest or DOE2.2 using gbXML for energy modeling purposes, such as ASHRAE 90.1, LEED, and Title 24.

So for example when modifying walls during a load calc. Exterior walls might be red, partitions blue, and interior walls (no heat transfer) green. This could even be expanded to visually shows with color walls that have windows or doors.

There have been many times when I've had to back check walls that were inadvertently called out as partitions instead of exterior. Color coding would give an instant visual clue where mistakes might have been made.

Add a transfer grille option for return air so that you can use the balance report function on projects which use transfer grilles.

It would be helpful to not have to use the "special" DM commands to manipulate the diffuser tags.

Add a command to allow you to edit the settings on multiple rooms at a time.

For large sprawling duct systems it is difficult to monitor all the duct sizes that change. When you calculate and redraw a single branch, all the ducts are erased and redrawn. This makes it difficult to know which duct sizes changed and which stayed the same.

Be able to right click or slow-double-click on a room name in the Zone Tree or Floor Tree to be able to change it

I would like to be able to have the duct size update on the plans (like a preview) without closing the dialog box.

It would be nice to at least have the command to match diffuser callout location.

by showing velocity and PD/100ft on a check layer, engineers could check work and easily scan and review a job for errors.

Add leader for duct text like it does when you add a grille, diffuser, or light fixture

When printing load calculations, have a Select All/Unselect All check box. It's a bit tedious to do manually.