Modify design load calculations to more accurately size/select VAV boxes. The revised calculations would take into account the heat required to overcome the additional air supplied to the VAV box that is over and above the minimum required in the heating calculations. This will help since the additional air is typically at 55 degrees and will actually add heat load to the space in addition to that required by the envelope and minimum supply air. In some cases this can be a significant load.

The tutorial doesn't get into enough depth or cover everything, specifically the master schedule and project schedules and how they affect the project.

Add the ability to choose the specific fitting type used when calculating pressure drop in duct systems. Currently, the fitting type is fixed.

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

Remember which zones are opened and closed in the zone tree dialog box when you open and close it.

Using the maximum scheduled pressure drop for every scenario over inflates the pressure calcs. This is very important for low-pressure systems with low static terminal units such as ducted VRF and Fan Coil Units that max out at .25". Using the maximum scheduled pressure drop of say, .1" for air devices make it difficult to design low static systems accurately.

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.

Ability to differentiate diffuser of different systems in the diffuser schedule. i.e. turn on or off diffusers associated with New, existing and demo systems.

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

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

Convert existing ductwork and piping layer to demolition.

Similar to how you can right click to add leader lines when labeling diffusers, it would be helpful to be able to right click duct labels to rotate them instead of making this a two step process. Also, rotating it would remove the arrow that sometimes accompanies the duct label.

When a VAV zone has people diversity specified, update the zone airflow. Currently, the zone load is updated, but the airflow is not.

Have an option to insert a 24x24 box around an diffuser for use in RCP's.

Fix the diffuser callouts so they can be moved more consistently and reliable with grips instead of using the "Move Callout" command.