Build "What-If" scenarios to see how changing a fitting affects total static pressure.
Several HVAC software developers have created Excel add-ins that "link" the ASHRAE algorithms directly into spreadsheet cells. These tools allow you to use custom functions like =ASHRAE_Fitting(ID, flow, size) to pull data without leaving Excel. 3. Manual Data Entry from the ASHRAE Handbook
The ASHRAE Duct Fitting Database (DFDB) is the industry standard for calculating pressure loss in HVAC systems. While the official software is a standalone application, many engineers prefer the flexibility of Excel for complex project calculations.
), which is vital for proper fan sizing and system balancing. How to Access the "Excel Link"
To effectively use an ASHRAE duct fitting link in Excel, you must have the following data points ready:
Common fittings like elbows, tees, transitions, and fan plenums.
To get the most current version of the data, visit the ASHRAE Bookstore . Ensure you are looking for the to get the best compatibility with modern Windows environments and Excel export capabilities.
The DFDB contains loss coefficient data for over 200 types of duct fittings. It covers: Supply, return, and exhaust systems. Round, rectangular, and flat oval geometries.
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