Ashrae Duct Fitting Database Excel -

=XLOOKUP([@Fitting_Ref], ASHRAE_DB[A:Fitting_Code], ASHRAE_DB[Loss_Coefficient]) If you have variable geometry (e.g., a transition where W1/W2 changes), use XLOOKUP with approximate match to find the closest geometric parameter. With coefficient C , velocity pressure Pv (in inches w.g. or Pa), the loss is:

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: ashrae duct fitting database excel

In Excel: = [@Coefficient] * (0.602 * ([@Velocity_FPM]/4005)^2) for IP units. Use SUMIFS to total all losses for each air handler. This yields your fan selection point instantly. Advanced Tips: Beyond Basic Lookup Once you have the ASHRAE Duct Fitting Database Excel file, you can build advanced features: 1. Automated Interpolation Between Table Values Many fittings lack exact matches for your dimensions. Use FORECAST.LINEAR : Enter the solution: In Excel: = [@Coefficient] * (0