What prevents vibration from a HVAC unit transferring to the connecting duct?

The use of a flexible connection is essential in an HVAC system to mitigate vibrations that can arise from the operation of equipment like air handlers, fans, or compressors. When these units run, they generate vibrations that can travel through rigid ductwork, potentially leading to noise issues, structural discomfort, or even damage over time.

A flexible connection serves as a buffer between the vibrating unit and the ductwork, absorbing and dissipating the energy from those vibrations. This allows for a degree of movement and reduces the transfer of vibrations to the duct system, maintaining a quieter and more efficient operation. By using materials that can bend or flex, these connections help to minimize the direct transmission of vibrations.

Other methods, such as isolators or rubber pads, may also contribute to vibration isolation but they cada serve primary functions that differ or complement the role played by a flexible connection. For example, isolators typically involve mounting techniques that support equipment while isolating it from vibration, and inertia pads may dampen vibrations but are used in specific contexts like installing heavy equipment. In contrast, flexible connections directly interact with ducting systems to effectively manage the vibration and ensure a smoother operation of the HVAC system.