CPC F24F 13/0218 (2013.01) [F16L 7/00 (2013.01); F24F 13/0245 (2013.01); F24F 13/0281 (2013.01)] | 22 Claims |
1. A system for packing and assembling a flexible duct, comprising:
a sleeve comprising:
a tubular vapor barrier;
an insulating layer within the vapor barrier and comprising a central cavity; and
wherein the sleeve is radially compressed and rolled along an axial direction; and
an air core sized to fit within the central cavity of the insulating layer, the air core comprising a sheet configured to block fluid flow therethrough and a structural support coiled within the sheet and wherein the air core is flattenable and not within the rolled sleeve.
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