This product is a zip file that contains files that consist of PowerPoint slides synchronized with the audio-recording of the speaker, PDF files of the slides, and audio only (mp3 format) as noted.So much of what is presented at the ASHRAE conferences is highly technical and related to new ideas, procedures and equipment. We all learn from our mistakes, this is called experience. The theme of this program is sharing. The purpose in sharing our experiences is to help others (younger and possibly less experienced) in their decision making process and possibly eliminate the mistakes others have made in the past.1. Tales from the CryptThomas Schlachter, P.E., Member, Engineered Air Balance Co Inc, Richardson, TX2. Best Laid Plans: Cautionary Tales for Designers and EngineersDonald Prather, HFDP, Member, Air Conditioning Contractors of America, Arlington, VA