browse VAV manufacturer's websites for info and trianing materials. www.Price-HVAC.com is one site that comes to mind.
__________________
Eventually, one needs to realize that it is far less important to be the smartest person in the room than it is to sit next to that person and make friends.
You need to be more specific. typically, all the information is from ASHRAE, in their handbooks, which are available for sale to HVAC engineers. otherwise, vendor information is what you need, for product specific installations.
If you need help designing a VAV system, hire an engineer who knows this stuff. there is no other solution, at least, in canada.
There are significant performance requirements that must be well understood. VAV is a control system, and is integral with the pressurizing fans.. if done wrong, you can over/underpressurize, and damage the building, and contents, as well as fail to provide comfort and control over the general human comfort.