Accuracy. A generic "square elbow" might have a coefficient of 0.25, but if it has turning van
The ASHRAE (American Society of Heating, Refrigerating, and Air-Conditioning Engineers) Duct Fitting Database is a collection of pressure loss data for various duct fittings, such as elbows, tees, and transitions. The database provides a comprehensive source of information for calculating pressure losses in duct systems. ashrae duct fitting database excel
Combine the fitting database with a fan curve and electricity cost ($/kWh). The spreadsheet can calculate: Accuracy
But manually flipping through tables of thousands of fittings to find a "Dynamic Loss Coefficient" (C or K-factor) is a drain on productivity. Enter the solution: Combine the fitting database with a fan curve
A well-structured Excel database includes:
Use CHOOSE and MATCH functions to build a flexible lookup. Alternatively, use SUMPRODUCT to find the row where all geometry parameters match within a tolerance.