Ashrae Duct Fitting Database Excel Jun 2026

Link your air volume (CFM) and duct sizing inputs directly to dynamic fitting loss calculations.

Migrating and maintaining ASHRAE data in Excel requires diligence to avoid costly design errors.

A drop-down menu referencing your Fitting_Database tab. Loss Coefficient ( ): Automatically populated using lookup formulas. Pressure Drop ( ): = C * p_v . Step 3: Automate the -Factor Lookup

It is crucial to use the ASHRAE Duct Fitting Database in compliance with its license. The database is a copyrighted product of ASHRAE. While the export features are intended for personal use within a project workflow, redistributing the raw data or creating derivative works is restricted under ASHRAE’s intellectual property policy. ashrae duct fitting database excel

: You can create individual projects, each with unique input values and results, allowing for "what-if" scenario analysis. Excel Integration : The official Duct Fitting Database Lite App

Do you prefer using native (like XLOOKUP), or are you comfortable using VBA / Macro code?

ASHRAE does not provide the full raw database as a single Excel file, but there are several ways to use the data within spreadsheets: Link your air volume (CFM) and duct sizing

Is this for a specific project type, such as or industrial ?

Instantly see how changing a duct dimension or fitting type impacts the total external static pressure (ESP) of the fan.

-factors often depend on variables like velocity ratios or geometric ratios, a simple VLOOKUP may not suffice. Use INDEX and MATCH functions combined with IF statements to handle dynamic criteria. For complex fittings where the Loss Coefficient ( ): Automatically populated using lookup

Some advanced Excel versions also include:

Build calculation sheets that match your firm's specific workflows and reporting standards.

While the DFDB is a specialized tool for calculating fitting losses, Excel is where many HVAC engineers build their complete system models. The need for an stems from a desire to create integrated, customizable, and transparent workflow for whole-system analysis.

Create a column that flags whether a segment is part of the critical run. Use a SUMIF formula to total only the pressure drops along that primary path. Beyond Formulas: Leveraging VBA and Python