Depending on the version you purchase, the linking between the DFDB software and Excel can be finicky. It often requires enabling specific Add-Ins or Macros, which can sometimes trip up corporate IT security settings.
Which of the ASHRAE database or handbook are you targeting?
: Lock the ASHRAE_Data tab with a password. This prevents accidental edits to the reference coefficients while leaving the main calculation sheet fully editable. Troubleshooting Common Link Failures 1. #N/A Errors on Lookups
ΔP=Co×Pvcap delta cap P equals cap C sub o cross cap P sub v is the total pressure loss and Pvcap P sub v is the velocity pressure. The Problem with Standalone Software ashrae duct fitting database excel link
: A free version available for iPhone and iPad on the App Store that covers a subset of common fittings.
There is no single "direct" Excel link to the official ASHRAE Duct Fitting Database (DFDB) because it is a . However, there are several ways to integrate ASHRAE data with Excel for External Static Pressure (ESP) calculations. 🛠️ Official ASHRAE Solutions
: Both the web-based version and the mobile app feature a "Reports" option. You can select "Inputs and Results" to generate an HTML email that includes a spreadsheet attachment compatible with Microsoft Excel. Third-Party Excel Tools : Sites like Depending on the version you purchase, the linking
Several HVAC software developers and commercial vendors offer pre-built Excel add-ins that officially bridge the gap between ASHRAE data and spreadsheet environments.
Because fitting coefficients vary based on changing aspect ratios and velocity ratios, standard VLOOKUP is rarely enough. Use the more powerful INDEX and MATCH combination, or the newer XLOOKUP , to perform two-dimensional matrix searches on your ASHRAE_Data tab.
Design airflow rate in Cubic Feet per Minute (CFM) or Liters per Second (L/s) : Lock the ASHRAE_Data tab with a password
Velocity (FPM)=CFMArea (sq. ft.)Velocity (FPM) equals the fraction with numerator CFM and denominator Area (sq. ft.) end-fraction
Do not use messy, unaligned cells. Convert your data ranges into official Excel Tables ( Ctrl + T ). Name your data table DuctRunTable . Use explicit columns: Fitting ID (e.g., CR3-1 for a common round elbow) Flow Rate (CFM or L/s) Velocity (FPM or m/s) Geometric Ratios (e.g., Loss Coefficient ( Cocap C sub o Step 3: Implement Dynamic Lookups
It contains loss coefficients ((C_o)) for thousands of fittings, including: