AQC Industries introduces Q Duct outdoor pre-insulated duct system, which is engineered for exterior and rooftop applications. Constructed to withstand harsh weather conditions in all climates, this rugged outdoor air-duct system saves energy, space and labor. The custom-fabricated, self-insulated Q Duct requires no additional weatherproofing or insulation and eliminates the need for an insulation subcontractor. Q Duct sections are delivered preassembled to the jobsite, ready for installation by a certified contractor. The product installs easily in a fraction of the time of traditional duct.