All air duct installations for heating, cooling or ventilation are attached to mechanical equipment containing a fan or blower. Vibrations, noises and rattles resulting from the operation of the fan or blower are transmitted into the metal ducts which carry the noises throughout the system. In order to isolate the vibration and noises to the source, an air-tight flexible joint, consisting of a fabric which is secured to sheet metal on both sides, must be inserted between the equipment and the ductwork. This flexible joint is called a “Flexible Duct Connector.” Ductware has tested all PROflex fabrics for UV resistance to conform to ASTM G-53-84. PROflex flexible duct connectors had to withstand 500 hours of UV exposure and water condensation. All fabrics performed well, showing no signs of degradation, with the exception of slight surface oxidisation of the neoprene – which does not affect the performance or integrity of the steel or fabric.