Should a VAV box be hung independently of the ductwork?

Yes, always. A VAV box contains a motorized damper, an electrical heater coil (often), and an actuator. It is too heavy to let dangle off sheet metal joints. It must be supported independently using its own dedicated all-thread rods, strapping, or a unistrut trapeze anchored directly to the building deck.

[' Yes, always. A VAV box contains a motorized damper, an electrical heater coil (often), and an actuator. It is too heavy to let dangle off sheet metal joints. It must be supported independently using its own dedicated all-thread rods, strapping, or a unistrut trapeze anchored directly to the building deck.']

Stop if

• Use this as training guidance. The foreman, approved drawings, project specs, manufacturer installation instructions, employer safety policy, and AHJ/code requirements always control the final answer.

Steps

• Yes, always. A VAV box contains a motorized damper, an electrical heater coil (often), and an actuator. It is too heavy to let dangle off sheet metal joints. It must be supported...

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