Mechanical · S-P84T9

VAV Box Connection Detail

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A straight sheet metal inlet duct leads into the VAV terminal unit, requiring a length equal to three times the terminal inlet diameter. A twelve-inch long section of flexible duct is permitted in the run, connecting via a tap-in fitting to the branch ductwork. Supply ductwork transitions from the terminal outlet to the duct size shown on plans, feeding downstream air devices. A ceiling access panel is required on non T-bar ceilings, and an identification mark must be provided on the ceiling to indicate the VAV box above. The temperature sensor is mounted near the door unless otherwise noted on plans.

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