This collection of 115 papers presented at the ASHRAE 2002 Winter Meeting include the complete collection of symposium and technical papers as well as discussion questions and answers for every paper. Included are technical papers, which are of permanent interest and of archival value. They are peer reviewed and considered of journal quality. ASHRAE Transactions also includes papers presented in symposia covering topical applications of HVAC&R technology. Transactions paper topics include indoor air quality, refrigeration, building controls, ventilation and more.