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.The seminar reviews the various building mechanical components that influence the low temperature operating range that will provide return water temperature to allow a condensing boiler to operate in condensing mode and optimize its operating efficiency, while minimizing the operating cost to heat the building. It also addresses common installation, operation, maintenance and control pitfalls that may reduce operating efficiency in high efficiency condensing boiler systems. Proper selection of equipment, water chemistry and pumping strategies are also discussed.1. The Design Factors that go into Providing a High Efficiency Condensing Boiler Heating System and Having the System Perform as Intended Once Installed and Throughout its LifeThomas Neill, Member, Mestek Inc, Southampton, MA2. High Efficiency Boiler Operation, Maintenance and Control for Efficient OperationTed Duffy, P.E., Member, LAARS Heating Systems Company, Rochester, NH