What is the primary purpose of a flex connection?

The primary purpose of a flex connection in an HVAC system is to prevent the transfer of vibration from the HVAC unit to the ductwork. This is important because HVAC equipment can generate significant vibrations during operation, which, if transmitted to the duct system, could lead to noise issues and potential structural fatigue over time. By using flexible connections, typically made from materials such as rubber or fabric, the system can absorb and mitigate these vibrations, resulting in a quieter and more stable operation.

Flex connections also allow for slight movement caused by thermal expansion or contraction of the ductwork and equipment, which helps to maintain the integrity of the system. The design and installation of these connections are crucial in ensuring that vibrations do not adversely affect the performance of the HVAC system or cause discomfort in the environment served by the ducting.

While options discussing the prevention of heat transfer and vibration to the structure may seem relevant, they do not specifically address the focus on the ductwork itself, which is where flex connections are primarily beneficial.