Mechanical · M-85EY5

Ceiling Diffuser and Flexible Duct Connection Detail

Materials

Elements

Ceilings Floors / Slabs Insulation Connections / Plates

About this detail

An insulated flexible duct connects the supply duct to a ceiling diffuser through a hard elbow and a conical branch take-off equipped with a locking damper. The flexible duct must be secured to the elbow collar and spin-in fitting using clamps, with a separate clamp provided for the outer insulation jacket, and its bend radius must not be less than one duct diameter. A maximum length of 1500mm applies to the flexible run, while runs exceeding 3000mm from the main require stepping up one duct size. A separate diagram shows a rigid duct connection featuring a reducer, a round flexible connector of maximum 300mm length, and a control panel with a damper actuator requiring unobstructed maintenance access and National Electrical Code clearances from below. Units must be supported independently rather than hung directly from the ductwork.

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