1 EXAM PREP DUCTULATOR (DUCT CALCULATOR)The 1 Exam Prep Ductulator (Duct Calculator), adapted from the Brown Technical model, is an essential HVAC design tool used to calculate proper air duct sizing for heating, ventilation, and air conditioning systems. It aligns with ACCA Manual D standards and ASHRAE fundamentals, allowing contractors, engineers, and technicians to determine optimal air velocity, friction loss, and static pressure in both rectangular and round ducts. This manual calculator assists exam candidates and field professionals in applying accurate airflow calculations required for state HVAC licensing exams and system design tasks. Commonly used in HVAC coursework and practical field applications, the 1 Exam Prep Ductulator ensures compliance with mechanical code requirements while promoting efficient and balanced air distribution in residential and commercial systems. The Ductulator - Duct Sizing Calculator is a hand held rotating calculator used for sizing supply and return duct systems using the equal friction design method. Includes scales for friction loss per unit length, air volume, air velocity, round duct diameter, and rectangular duct diameters
