Streamline your duct system design with Manual D® - Residential Duct Systems (Third Edition). Recognized by ANSI, Manual D provides the latest guidance on designing efficient duct systems, including updated VAV examples, impacts of flexible duct installation, and new equivalent length values. This essential guide ensures accurate, compliant duct sizing across all materials, helping you design better systems in less time. Elevate your residential projects with trusted principles from ACCA. Learn more at the link below. https://hubs.li/Q02YZzd30 #ManualD #DuctDesign #HVACRSystems