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References: Fan Performance, Curves and Ratings

  1. Density of air - Wikipedia - Explains how air density depends on temperature, pressure and humidity, with standard values. The basis for the chapter's temperature and altitude correction factors.

  2. Sound power - Wikipedia - Defines sound power and sound power level and contrasts them with sound pressure. Supports the chapter's explanation of why fan catalogs publish sound power.

  3. Sone - Wikipedia - Defines the sone as a unit of perceived loudness and relates it to phons and decibels. Background for the sone ratings published on commercial fans.

  4. Fan Engineering: An Engineer's Handbook on Fans and Their Applications - Robert Jorgensen (ed.) - Buffalo Forge Company - A long-standing industry handbook, valued for presenting fan performance, fan and system curves, and density corrections in the units and form catalogs use.

  5. Fans and Ventilation: A Practical Guide - William Cory - Elsevier - Cory explains fan pressures, efficiencies, system effect and fan-system interaction in practical, application-focused terms, with attention to how test ratings relate to installed performance.

  6. AMCA Publications - Air Movement and Control Association - Lists the standards this chapter names: AMCA 210 (ANSI/ASHRAE 51) for fan testing, Publication 201 on fans and systems, Standard 99, and Standard 300 for sound testing.

  7. AMCA Certified Ratings Program - Air Movement and Control Association - Explains AMCA certification and the standards it relies on, including AMCA 210, AMCA 300 and Publication 311. Context for the AMCA seal on catalog ratings.

  8. FanPedia: The Fan & Blower Encyclopedia (PDF) - Twin City Fan - Source for the evasé and outlet area (p. 146), ventilating sets (p. 167), damper effect on the operating point (p. 182) and inlet box system effect (p. 187) cited here.

  9. FanPedia online - Twin City Fan - Online edition of FanPedia, including the accessories and technical description sections that discuss flow control and system effect. Useful when reading a catalog rating.

  10. Centrifugal Fans - Twin City Fan - Current catalog page for SWSI and DWDI housed centrifugal fans, the entry point to the product catalogs and performance data this chapter teaches you to read and correct.