Ashrae Duct Fitting Database |top| -

By using the precise C value from the database, an engineer can calculate exactly how much pressure a fitting will consume. In a system with 100 fittings, aggregating accurate C values can mean the difference between a fan that runs at 75% power and one that runs at 100%—representing thousands of dollars in annual energy costs.

: The database is integrated into major design software like Autodesk Revit, allowing MEP engineers to perform calculations directly within their 3D models. Applications in the Field Ashrae Duct Fitting Database

Where Velocity Pressure (VP) = (Density * V^2) / 2 . By using the precise C value from the

Engineers use the database to determine the total pressure loss of a ventilation system by summing the individual losses of every straight section and fitting. This total ESP is critical when procuring air handling units (AHUs) or fan coil units (FCUs), as it ensures the equipment can overcome the resistance of the ductwork while delivering the required airflow (CFM). Applications in the Field Where Velocity Pressure (VP)