Ashrae Duct Fitting Database Excel May 2026
The ASHRAE Duct Fitting Database is a digital compilation of loss coefficients for virtually every standard duct fitting used in commercial and industrial HVAC systems. Historically, these values were locked in PDFs or printed tables. Today, ASHRAE provides this data in structured formats—including Microsoft Excel.
When we refer to the ASHRAE Duct Fitting Database Excel, we are talking about a spreadsheet (or a set of CSV/Excel files) that contains:
Essentially, it is the lookup table on steroids, ready for formula-driven analysis. ashrae duct fitting database excel
You can add a column to apply SEF based on fan discharge configurations. For example, a fan discharging into an elbow without straightening vanes can increase (C_o) by 40-100%. Use Excel's conditional logic to warn the user.
Date: April 13, 2026
Subject: Evaluation and Application of ASHRAE’s Duct Fitting Database in Excel The ASHRAE Duct Fitting Database is a digital
| Tool | Format | Pros | Cons | |------|--------|------|------| | ASHRAE Duct Fitting Database (Official) | Excel, Access, Text | Authoritative, complete | Requires license | | McQuay / Daikin Duct Sizer | Free .exe | Easy GUI | Limited fitting library | | Carrier HAP / Trane Trace | Commercial software | Integrated load/duct calcs | Expensive | | Elite Software DuctSize | Commercial | Extensive fittings | Cost & learning curve | | Self-built Excel from PDF tables | User-created | Free (if you have Handbook) | Time-consuming, error-prone |
A well-structured Excel database includes: Essentially, it is the lookup table on steroids,
| Column | Description | |--------|-------------| | Fitting ID | Unique code (e.g., “CD3-9”) matching ASHRAE’s classification | | Fitting Type | Elbow, round tap, rectangular mitered, etc. | | Shape | Round, rectangular, flat oval | | Description | Detailed geometry (e.g., “90° smooth radius elbow, r/D=1.5”) | | Parameters | Variables like radius ratio, aspect ratio, angle, area ratio | | Loss Coefficient (C or Co) | The primary output for pressure drop calculation | | Reference Table/Figure | ASHRAE Handbook source location |
Some advanced Excel versions also include: