When might you need to increase the duct size in a system?

Increasing the duct size in an HVAC system is often necessary when the airflow exceeds the design specifications. This situation can occur when additional vents are added or when equipment is upgraded, resulting in a higher demand for airflow than what the existing ductwork was designed to handle.

When the airflow exceeds the design specifications, it can lead to increased velocity through the ducts, which can cause issues such as noise, inefficient heating or cooling, and even potential damage to the ducts due to excessive pressure. By increasing the duct size, you can accommodate the higher volume of air, reduce airflow resistance, and maintain efficient operation of the system.

This adjustment helps achieve optimal system performance, ensuring that the areas being heated or cooled receive adequate airflow at a rate that meets comfort requirements without straining the system.