Ashrae Duct Fitting Database Version. 6.00.05 Jun 2026

This occurs when trying to calculate an empty selection. Ensure a specific fitting sub-type is highlighted (not just the category folder).

Specific categories for elbows, transitions, junctions, obstructions, and fan inlets/outlets.

The problem? Their old duct fitting loss coefficient database was a patchwork of scanned PDF tables from ASHRAE's Fundamentals Handbook — 1997 edition. Each lookup required flipping pages, interpolating values, and manually entering coefficients into their energy modeling software. Mistakes were common. Disputes between the design team and the commissioning agent were routine. "Table 5-23 says 0.22," one engineer would say. "No, look at note C — it's 0.19," another would argue. ashrae duct fitting database version. 6.00.05

Full data ranges for rectangular, round, and flat oval configurations.

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loss coefficient table that occurred during the transition from version 6.00.04. Carmel Software Core Capabilities of the DFDB This version maintains the foundational features of the ASHRAE Duct Fitting Database Comprehensive Coverage : Includes loss coefficient tables for over 200 round, rectangular, and flat oval duct fittings Pressure Loss Calculation

: Includes loss coefficient tables for round, rectangular, and flat oval fittings. The problem

Version 6.00.05 built on these changes by integrating the database and adding real‑time calculation capabilities. For the mobile app, subsequent updates (Version 6.1) refined specific fittings such as SR7‑2, SR7‑3, SR7‑14, SR7‑15, SR7‑16, and SR7‑17.

The ASHRAE Duct Fitting Database is a quiet workhorse of HVAC design: a standardized catalog of pressure-loss coefficients and equivalent lengths for hundreds of fittings. Version 6.00.05 doesn’t change the game's premise — it refines the numbers that determine how much fan energy you’ll spend moving air through a system. For design engineers, energy modelers, and commissioning teams, even small database tweaks cascade into measurable impacts on equipment sizing, fan selection, energy simulations, and operating costs.

Modern energy codes, such as and IECC , place strict limits on the Fan System Brake Horsepower (BHP). To comply, engineers must optimize the duct pathway. Using DFDB Version 6.00.05, designers can run "what-if" scenarios—comparing a radiused elbow to a mitred elbow with turning vanes—to choose the lowest-resistance path and minimize fan power consumption. Seamless BIM Integration Core

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