Return ducts are an essential part of a heating, ventilation, and air conditioning HVAC system. They are responsible for carrying air from the living spaces back to the HVAC unit. This process helps maintain balanced air pressure and ensures that the system can efficiently heat or cool the home. These ducts typically connect to return vents located in various rooms. When air is drawn back through these vents, it is filtered and conditioned before being redistributed throughout the space. Properly sized and maintained return ducts contribute to improved indoor air quality and energy efficiency in a building.