: The interface updates results instantly as you enter flow rates and fitting dimensions. Visual Aid : Each fitting includes a pictorial outline for easy identification during the design phase. Project Management
The ASHRAE Duct Fitting Database is a comprehensive, digital library of loss coefficients (
Got a war story about a duct fitting that didn’t behave like the manual said? Drop it in the comments—we’re collecting “loss coefficient horror stories.” ashrae duct fitting database version 60005
The reason specific version numbers are so critical is that ASHRAE is constantly refining the science.
When fans are installed with poor inlet or outlet conditions (e.g., a fan blowing directly into a 90-degree elbow without a straight length), the fan's performance degrades significantly. Manufacturers rate fans in laboratory conditions; the DFD provides the coefficients necessary to calculate the real-world penalty. : The interface updates results instantly as you
An engineer redesigned a critical care wing using v60005. The old database predicted 0.78 in. w.g. for a complex plenum takeoff. New data: 0.93 in. w.g. Result? They upsized two duct runs early, avoiding a fan replacement later.
Specialized fittings for restricted spaces. 3. Visual Representation An engineer redesigned a critical care wing using v60005
The DFDB includes loss coefficient tables for more than 200 round, rectangular, and flat oval duct fittings. The database covers a wide array of fitting categories for supply, exhaust, and common (supply/return) duct functions. The full library features over 240 fittings, including many types that are covered by the free "DFDB Lite" app to provide a representative sample:
Using accurate data is critical because standard friction charts designed for sheet metal may not accurately reflect the performance of flexible ducts or fiberglass duct board