The inner liner of the flexible duct pulls over the diffuser collar and secures with a draw band. The insulation and outer jacket secure separately with a second draw band over a seal. A minimum one-and-a-half-inch wide saddle provides support at elbows and every five feet for horizontal runs. An elbow support device maintains the ninety-degree shape if the flexible duct itself cannot sustain it.
FLEXIBLE DUCT DRAW BAND (1) DRAW BAND (2) DIFFUSER WITH ROUND INLET CONNECTION (3) MIN. 1-1/2" WIDE SADDLE. PROVIDE SUPPORT AT ELBOW AND EVERY 5 FT FOR HORIZONTAL DUCTWORK. (4) ACCESSIBLE CEILING SEAL NOTES: (1) PULL FLEXIBLE DUCT'S INNER LINER OVER DIFFUSER COLLAR AND SECURE WITH DRAW BAND. (2) SECURE FLEXIBLE DUCT INSULATION AND OUTER JACKET WITH DRAW BAND. (3) REFER TO SECTION 23 0700 FOR DIFFUSER INSULATION REQUIREMENT. (4) PROVIDE ELBOW SUPPORT DEVICE SIMILAR TO THERMAFLEX FLEXFLOW ELBOW IF 90° ELBOW SHAPE IS NOT MAINTAINED BY FLEXIBLE DUCT ITSELF.
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