Patent ID: 7393021

Claim:
A duct system, comprising: a flexible duct including an inner sleeve containing a coil of wire, an outer sleeve, and insulation between the inner and outer sleeves; a fitting having an end including either an in-turned circumferential lip or a plurality of circumferentially arranged tabs; a collar having a first end and a second end, said first end being adapted to be secured to the flexible duct, and said second end being adapted to be secured to the end of said fitting, such that, if the end of said fitting includes an in-turned circumferential lip, the second end of said collar includes a plurality of circumferentially arranged tabs adapted to engage the in-turned circumferential lip of the end of said fitting, and if the end of said fitting includes a plurality of circumferentially arranged tabs, the second end of said collar includes an in-turned circumferential lip adapted to engage the plurality of circumferentially arranged tabs at the end of said fitting; and at least one gasket for forming a seal between said fitting and said collar, said gasket being circumferentially arranged around said collar and having an exposed adhesive surface, such that said collar is secured to the end of said flexible duct by adhering the inner sleeve of said flexible duct to the adhesive surface of said gasket.