The tool allows duct designers to account for less than optimum installation and gives a more accurate design to installed performance correlation.
ASHRAE has released a new duct sizing calculator in a partnership with the Air Distribution Institute. It helps HVAC engineers and technicians more accurately size ducts, especially flex ducts under varying amounts of compression.
The Duct Size Calculator is a quick reference tool for approximating duct sizes and equivalent sizes of sheet metal duct vs. flexible duct. The calculator uses information from ASHRAE Research Project 1333, HVAC Duct Efficiency Measures, and was developed with funding support from ASHRAE and ADI. ASHRAE Technical Committee 5.2, Duct Design, sponsored the project.
“While the calculator resembles a wheel similar to those used during the days of slide rules, it incorporates three new fields for equivalent duct sizing,” says the developer of the calculator, Chris Van Rite. “These new fields help demonstrate the significant loss of airflow due to improper installation of flexible ducts.”
To see more about the calculator in detail or to purchase, please click here.
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