This collection of 66 papers presented at the ASHRAE 2006 Annual Meeting, includes the complete collection of papers, as well as discussion questions and answers for every paper. Included are technical papers, which are of permanent interest and archival value. They are peer reviewed and considered of journal quality. Also included are papers presented in symposia covering topical applications of HVAC&R technology. Transactions paper topics include indoor air quality, refrigeration, building controls, sustainability, and more.