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 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 attached to sheet metal on both side, must be inserted between the equipment and the duct work. This vibration isolator is called a "Flexible Duct Connector". All Duro Dyne Flexible Duct Connector Products are suitable for pressures of -10 to +15 wg. Duro Dyne's standard ‘single fold’ metal to fabric grip has been tested by an independent testing laboratory to withstand a negative pressure of-10’’WC and a positive pressure of +17.25’’ WC with no tearing or visible separation.
