The Astberg 3 Step Disk Diffuser CFM Volume Controller (ASD100) is a reliable and efficient solution for managing airflow in HVAC systems. With its innovative 3-step adjustment mechanism, this volume controller allows for precise regulation of cubic feet per minute (CFM) output, ensuring optimal ventilation in a wide range of environments. Designed for both residential and commercial ... https://www.industrywaala.com/product/astberg-3-step-disk-diffuser-cfm-volume-controller-asd100