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NEWS
ASHRAE Publishes Load Calculations Manual
February 20, 2009

Guidance to help designers improve the performance and efficiency of design as it relates to load calculations is contained in a new book from The American Society of Heating, Refrigerating, and Air-Conditioning Engineers (ASHRAE). Load Calculation Applications Manual focuses on two methods for calculating cooling loads in non-residential buildings — the heat balance method and the radiant time series method (RTSM). Author Jeffrey Spitler noted that understanding these methods is crucial when answering three primary design questions — what is the required equipment size; how do the heating/cooling requirements vary spatially within the building; and what are the relative sizes of the various contributors to the heating/cooling load?

The new manual features in-depth examples, as well as bringing together the latest data for building materials, windows, weather, and internal heat gains, according to Mr. Spitler. The accompanying CD contains spreadsheets that compute the factors needed by the RSTM and compute cooling loads with the RSTM. The manual is the fourth in a series of load calculation manuals published by ASHRAE, including the first and second editions of Cooling and Heating Load Calculation Manual as well as Cooling and Heating Load Calculation Principles.

The cost of the Load Calculations Applications Manual is $119 ($97, ASHRAE members). To order, contact ASHRAE Customer Service at 1-800-527-4723 (United States and Canada) or 404-636-8400 (worldwide), fax 404-321-5478, or visit the ASHRAE bookstore online.


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