Advanced Variable Air Volume VAV System Design Guide - December 2009


Year: 2009
No of Pages: 331 pages
Edition: 3rd edition
Size: 4.3 MB
File Format: PDF
Book Description:
The Advanced Variable Air Volume (VAV) System Design Guide is written for Heating, Ventilation, and Air-Conditioning (HVAC) designers and focuses on built-up VAV systems in multi-story commercial office buildings in California.

The Design Guide recommendations include best practices for airside system design, covering fans, air handlers, ducts, terminal units, diffusers, and controls, with emphasis on getting the air distribution system components to work together in an integrated fashion. Key topics critical to optimal VAV design and performance are addressed in the following chapters: 1) early design issues, 2) zone issues, 3) VAV box selection, 4) duct design, 5) supply air temperature reset, 5) fan type, size, and control, 6) coils and filters, and 7) outdoor
air, return air and exhaust air. The intent of the information is to promote efficient, practical designs that advance standard practice, achieve cost-effective energy savings and can be implemented using current technology.


This is the third edition of the VAV Design Guide. The original was published in October 2003 and was developed as part of the Integrated Energy Systems - Productivity and Building Science project, a Public Interest Energy Research (PIER) program administered by the California Energy Commission and managed by the New Buildings Institute.

Development of the second edition was managed by Pacific Gas & Electric as part of the Energy Design Resources program. Highlights of new material in the second edition include:
  •     Additional guidance for simulating VAV system performance
  •     Updates for changes to Title 24
  •     Added cost-effectiveness analysis for demand controlled ventilation
  •     Guidance on using window switches for integration with natural ventilation
  •     Information on stability of VAV box controls at low flow
  •     Updated guidance on use of electric reheat
  •     Updated supply air temperature control sequences
  •     Updated supply air pressure reset control sequences
  •     More information about dealing with rogue zones
  •     Updated appendix with DOE2 fan curves
In addition, eight new appendices were added, covering the following topics:
  1.     VAV box minimum and maximum flows for two manufacturers
  2.     Modeling of different VAV control sequences
  3.     Simulated performance of different VAV controls options
  4.     Modeling guidance for demand control ventilation


For this third edition, between January and April of 2010, an engineering review of this document was conducted to update passages affected by changes in the California Building Energy Efficiency Standards (Title 24 2008). The original content creator was not actively involved in this engineering review, and therefore is not responsible for the updates to the affected passages.

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