Direct bookings are defined as a room booking that uses a base space not a component space. Indirect bookings are generated dynamically and are based on a direct booking of a component space. For example, if you have a component space called BUILDING with child spaces for Room 1, Room 2, Room 3, if the BUILDING is booked directly, then 3 indirect bookings will be generated for Room 1, Room 2, and Room 3. These indirect bookings are read-only.
In Events2HVAC, you have the option to generate indirect bookings or not.