Elite Software offers a limited free version of their duct sizer. It includes a basic fitting database derived from ASHRAE fundamentals. It will not have all 1,200 fittings, but it covers the 80/20 rule (the 80% of fittings used in 20% of jobs).
between DFDB data and other HVAC standards (like CIBSE)? Duct Fitting Database - ASHRAE ashrae duct fitting database 6.00 05 free download
Unlike static PDF tables, the 6.00.05 version allows you to adjust multiple variables: Elite Software offers a limited free version of
Mastering HVAC Design with ASHRAE Duct Fitting Database 6.00.05 ashrae duct fitting database 6.00 05 free download
For any given fitting, enter the flow rate and fitting information and obtain loss coefficient data and associated pressure loss.