The 2005 ASHRAE Handbook-Fundamentals covers basic principles and data used in the HVACR industry. Research sponsored by ASHRAE and others continues to generate new information to support the HVACR technology that has improved the quality of life worldwide. The ASHRAE Technical Committees that prepare these chapters strive not only to provide new information@ but also to clarify existing information@ delete obsolete materials@ and reorganize chapters to make the Handbook more understandable and easier to use. This edition includes a new chapter (26)@ Insulation for Mechanical Systems@ and an accompanying CD-ROM containing not only all the chapters in both I-P and SI units@ but also the vastly expanded and revised climatic design data described in Chapter 28.