Skip to content

References: Reading Catalogs and Performance Tables

  1. Linear interpolation - Wikipedia - Derives the straight-line interpolation formula with worked examples and error discussion. The same formula this chapter uses to read RPM and BHP between printed rows and columns.

  2. Air changes per hour - Wikipedia - Defines air change rate and the relation between room volume, airflow and time. Background for the air change method the chapter takes from ERG-100.

  3. Critical speed - Wikipedia - Explains the natural bending frequency of a rotating shaft and why running near it amplifies vibration. Supports the chapter's first critical speed margin of 1.43 times class maximum speed.

  4. Industrial Ventilation: A Manual of Recommended Practice for Design - American Conference of Governmental Industrial Hygienists (ACGIH) - The ACGIH committee's tables of minimum duct conveying velocities by material are the values ERG-100 reprints and this chapter uses to size ducts and choose fan families.

  5. Fan Handbook: Selection, Application, and Design - Frank P. Bleier - McGraw-Hill - Bleier writes from the selection engineer's chair, walking from a duty point to catalog data, operating limits and drive losses, the same reading sequence this chapter teaches.

  6. FanPedia: The Fan & Blower Encyclopedia (PDF) - Twin City Fan - The technical descriptions (pp. 161-197) this chapter cites, and the encyclopedia the current catalog overrides when they disagree; also available as FanPedia online.

  7. Catalog 300: BC Backward Inclined Fans - Twin City Fan - Source of the chapter's catalog structure, engineering data, material specifications and options examples; its certified performance lives in Fan Selector software.

  8. Catalog 902: RBO, RBR, RBA, RBW and RBP Industrial Fans - Twin City Fan - Source of the RBA 913 performance table, class shading legend, availability table and rating-condition footer used in this chapter's worked examples.

  9. Engineering Resource Guide ERG-100 - Twin City Fan - Air change times, conveying velocities and the density-correction worked example (17,000 CFM at 300°F and 3,000 ft) reproduced in this chapter.

  10. An Introduction to the AMCA Certified Ratings Program - AMCA International - Explains how the seal is earned and what it covers; see also AMCA Publication 211 and ANSI/AMCA Standard 204.