By choosing one of these official paths, you ensure you have a secure, accurate, and up-to-date tool to support your HVAC engineering work. For the most reliable and current information, always refer directly to the official ASHRAE website.
Many companies (like Titus or Greenheck) offer free, web-based tools that include fitting loss data.
This public link is valid for 7 days and shares a thread, including any personal information you added. This link or copies made by others cannot be deleted. If you share with third parties, their policies apply. Can’t copy the link right now. Try again later. Duct Fitting Database - ASHRAE ashrae duct fitting database 6.00 05 free download
Using the database involves a standard engineering workflow:
Includes data for elbows, tees, transitions, hoods, entries, and exits across different cross-sectional shapes (round, rectangular, and flat oval). By choosing one of these official paths, you
Version is a mature release offering compatibility with modern system sizing software (e.g., Trane Duct Designer, Carrier HAP, Elite Software, and Revit plugins). It eliminates guesswork, reduces system energy consumption, and ensures accurate static pressure calculations.
ASHRAE Fundamentals (Chapter 34) – printed or via public library reference – contains abridged loss coefficient tables. Not as searchable as DFDB, but legally free if borrowed. This public link is valid for 7 days
Instant access from any device (PC, Mac, tablet) and automatic updates whenever coefficients are revised. Option 2: The ASHRAE Handbook—Fundamentals
She downloaded it anyway. The zip was small; the readme inside was smaller still: “For those who listen to the language of airflow.” Beneath that, a list of contents: fittings, loss coefficients, manufacturing notes, and one file named STORY.txt.