Airflow balancing adjusts dampers and registers throughout a duct system to distribute air evenly across all supply vents and achieve uniform temperatures in every conditioned space. Improper distribution creates hot and cold spots that reduce comfort and waste energy. Balancing is performed after system installation or when occupancy patterns change, requiring systematic measurement and adjustment of each supply and return location.
Balancing Procedure
Technicians measure CFM at each supply register using a balancing hood or anemometer grid. They compare actual readings to design specifications and adjust volume dampers in branch ducts to redirect air toward underserving registers. Return dampers are adjusted to maintain proper return airflow across all return grilles. Balancing reports document initial and final readings with adjustments made.
Comfort and Efficiency
Properly balanced systems eliminate temperature complaints and reduce energy waste from excessive air to certain zones. Balancing improves humidity control, reduces noise from high-velocity supply jets, and extends equipment life by preventing short-cycling. Periodic rebalancing after renovations or occupancy changes maintains optimal performance and ensures all spaces receive adequate conditioning throughout the system’s operational life.