vibration isolation at fans and air-handling equipment equipment connections: rtu, ahu, vav, fans & louvers vibration isolator spring rubber pad fan ahu flexible connector keep the equipment isolated from rigid duct, piping, conduit, and supports exactly as the approved detail shows. one rigid bridge can transmit vibration and noise through the structure even when the equipment has proper isolators. equipment and isolator submittals, vibration-control detail, manufacturer startup instructions can we verify the isolator setup and every possible vibration bridge before this fan or air handler is started?