Finally, a spreadsheet that understands my ductwork existential crisis
: The database uses industry-validated data to prevent the common issues of oversizing (which wastes energy) or undersizing (which fails to meet cooling/heating loads). How to Get the Full Version Legally Ashrae Duct Fitting Database Version 6.0 Free Download
Traditionally, engineers used printed tables (like those in the 2017 ASHRAE Handbook—Fundamentals) to find "Dynamic Loss Coefficients" (C or Co). However, those tables are static. The modern database is interactive. It allows software to calculate losses based on specific geometry rather than generic approximations. The modern database is interactive
ASHRAE provides two primary ways to access the database officially: Cloud-Based Subscription : The full version (currently 6.00.05) is available via an annual subscription those tables are static.
Assuming you have obtained a legitimate copy (either via a membership or an official free academic release), here is how to maximize its value.