Pressure losses in 12", 14", and 16" non-metallic flexible ducts with compression and sag.(Report): An article from: ASHRAE Transactions

This digital document is an article from ASHRAE Transactions, published by American Society of Heating, Refrigerating, and Air-Conditioning Engineers, Inc. on January 1, 2009. The length of the article is 4707 words. The page length shown above is based on a typical 300-word page. The article is delivered in HTML format and is available immediately after purchase. You can view it with any web browser.

From the author: A study was conducted to measure air pressure loss in non-metallic flexible ducts and included 12" (305 mm), 14" (356 mm) and 16" (406 mm) diameter ducts on a flat surface and also positioned over joists on 24" (610 mm) centers. For this study, flexible duct compression configurations were fully stretched and 4%, 15%, 30% and 45% compressed. Measurements were performed at each compression. All tests were performed in conformance to ASHRAE 120-1999, Methods of Testing to Determine Flow Resistance of HVAC Air Ducts and Fittings (ASHRAE 1999) with a positive pressure, blow-through configuration. The data from this study exhibited higher pressure loss than prior Air Conditioning Contractors of America (ACCA) or ASHRAE data. Measured pressure losses were 2 to 13 times higher than round steel ducts.

Citation Details
Title: Pressure losses in 12", 14", and 16" non-metallic flexible ducts with compression and sag.(Report)
Author: Charles Culp
Publication:ASHRAE Transactions (Magazine/Journal)
Date: January 1, 2009
Publisher: American Society of Heating, Refrigerating, and Air-Conditioning Engineers, Inc.
Volume: 115 Issue: 1 Page: 622(7)

Article Type: Report

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