The proper design and construction of the VAV ductwork system are critical to ensuring the normal operation and control of the VAV system during its later stages01. Connection Methods of VAV-BOX Branch Ducts and Main Ductsa.The branch-to-main duct connection for VAV-BOX units adopts a lateral tapping method (see Figure 1). This configuration ensures more uniform inlet static pressure across all VAV-BOX terminals, significantly simplifying system commissioning.Figure1b.The branch duct interface shall have a 45° transition angle or rounded edge. The branch duct must not protrude into the main d...

In the variable air volume air conditioning system, the single duct variable air volume terminal equipment (VAV-BOX) is one of the most common variable air volume terminal devices.Its main function is to automatically adjust the supply air according to the temperature requirements of the room so that the indoor temperature remains within the set range to ensure a constant and comfortable space environment.In the previous chapter, we have gained an in-depth understanding of the measurement principles, common accessories and applications of single -duct variable air volume terminals. In this cha...