Ashrae Duct Fitting Database 2016 |link| Info

[ C_b = \frac\Delta P_branchP_v,branch ]

Prior to the widespread integration of cloud-based design tools, ASHRAE released the DFDB as a standalone executable program (often on CD-ROM or digital download). The (or the v6.x software releases around that time) was a staple on the hard drives of HVAC consultants. ashrae duct fitting database 2016

: Users enter dimensions (width, height), radius ratios, airflow (CFM or L/s), and air density. [ C_b = \frac\Delta P_branchP_v,branch ] Prior to

For an elbow, this might be the radius-to-diameter ratio (r/D). For a transition, it is the area ratio (Ao/Ai) and the included angle (θ). For a tee, it is the branch-to-main velocity ratio (Vb/Vc) and area ratio (Ab/Ac). For an elbow, this might be the radius-to-diameter

: The interface displays calculations that update instantly as inputs are adjusted. Dual Units : Calculations can be performed in both I-P (Inch-Pound) SI (International System)

For a standard fitting, such as a , the database requires and provides the following: Inputs : Width (W), Height (H), Radius Ratio ( ), Angle ( ), and Flow Rate ( Outputs : Velocity ( Vocap V sub o ), Velocity Pressure ( Pvcap P sub v ), and the Loss Coefficient ( Cocap C sub o Access and Modern Compatibility

: It includes data for various fittings such as elbows, transitions, junctions, and obstructions.