Excel: Ashrae Duct Fitting Database

). You can use IF or VLOOKUP / XLOOKUP functions to select the correct coefficient based on input parameters.

=XLOOKUP([@Fitting_Ref], ASHRAE_DB[A:Fitting_Code], ASHRAE_DB[Loss_Coefficient])

Since the full database is a paid, interactive tool, you typically use a "lookup-and-transfer" method: ashrae duct fitting database excel

You can acquire the standalone ASHRAE Duct Fitting Database application, which features an interactive interface and printable reports.

The main calculation engine containing individual rows for each duct section and fitting. Fitting Code, CFM, Velocity, The main calculation engine containing individual rows for

Always validate the output of your custom Excel tool against the official ASHRAE DFDB software or an established hand-calculation before rolling it out to your broader design team. Digital Alternatives to Excel

ASHRAE sells a standalone desktop application. Many workflows involve using the app to look up specific, complex fitting coefficients and manually pasting those values into an Excel master static pressure profile sheet. Many workflows involve using the app to look

Dynamic losses occur due to turbulence, flow separation, and changes in direction or cross-sectional area inside a fitting. ASHRAE calculates this pressure drop using the dimensionless loss coefficient (

ASHRAE now primarily offers the Duct Fitting Database via a . For Excel users, the value lies in:

| Column Name | Description | Example Value | | :--- | :--- | :--- | | Fitting_Type | ASHRAE Designation | CR4-1 | | Shape | Round, Rect, Oval | Rectangular | | Coefficient_C | Loss Coefficient | 0.25 | | Re_Range | Reynolds Number Applicability | > 10^5 | | Parameter_A | e.g., Aspect Ratio (H/W) | 0.5 | | Parameter_B | e.g., Radius Ratio (r/W) | 1.5 |

You might ask, "Can’t I just use my handbook?" Here is why the Excel database is superior: