How do I determine the "right" and "left" hand side of a VAV box?

Stand at the inlet of the VAV box looking in the direction of the airflow (looking down line). Whichever side the control enclosure, DDC controller, and actuator motor are mounted on determines if it is a right-hand or left-hand box.

['Stand at the inlet of the VAV box looking in the direction of the airflow (looking down line). Whichever side the control enclosure, DDC controller, and actuator motor are mounted on determines if it is a right-hand or left-hand box.', 'Field Warning: Missing this on a layout means your control panel might end up jammed blindly against a concrete wall or structural beam, failing inspection immediately.']

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.

Check

• Field Warning: Missing this on a layout means your control panel might end up jammed blindly against a concrete wall or structural beam, failing inspection immediately.

Steps

• Stand at the inlet of the VAV box looking in the direction of the airflow (looking down line). Whichever side the control enclosure, DDC controller, and actuator motor are mounted on...

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