Ductwork for delivery of low temperature air

摘要: A duct device for insulated delivery of temperature controlled air. The comprises an elongated, tubular member configured as a conduit air and having wall fabricated non-load-bearing insulative material. This material includes at least one continuous gap formed into the extending along member. is filled with rigid binder which bonds to capable reinforcing structural strength operates strut, may be positioned longitudinally member, or in other patterns such helical configuration. Reinforcing structure also disclosed end sections interconnecting structure.