The second edition of guide for the thermal design of IT systems has been revised to include new standards for thermal envelopes and the recommended temperatures for equipment operation environments in datacom facilities. As the first entry in the ASHRAE Datacom series, this field manual provides IT professionals with specifications for equipment operating environments, facility temperature, humidity measurement, equipment placement, airflow patterns, manufacturer heat load and airflow reporting. The ASHRAE Technical Committee 9.9 also includes a laminated quick-reference card for these specifications. Annotation ©2009 Book News, Inc., Portland, OR (booknews.com)