This product is a PDF that contains links to files that consist of PowerPoint slides synchronized with the audio-recording of the speaker (recorded presentation), PDF files of the slides, and audio only (mp3) as noted.

This seminar presents the current state of hot water delivery as defined by several building, energy and plumbing codes, the guidance documents provided by the American Society of Plumbing Engineers and several relevant ASHRAE committees. Early in 2010, the International Association of Plumbing and Mechanical Officials published the Green Plumbing and Mechanical Code Supplement. This document dramatically reduced the allowable volume from the source of hot water to the fixtures to 32 ounces from a water heater or boiler or 16 ounces from a recirculation loop or heat traced line. It also promulgated a revised insulation requirement intended to result in equal heat loss per foot of pipe, regardless of the pipe diameter. The GPMCS set the standard to increase the performance of hot water delivery systems in terms of energy, water and time by incorporating the results of research into hot water delivery systems into code language. The 2012 International Plumbing Code has just recently adopted a change to reduce the length from the source of hot water to the fixture from 100 to 50 feet. Nothing similar was done in the 2012 International Residential Code. The 2012 International Energy Conservation Code adopted a different rubric, which requires insulation on long, large diameter piping and none if the volume is kept to less than 1 quart. The International Green Construction Code Public Version 2 has a table to figure out the length for each type of pipe so that the volume in the piping will be less than either 80 ounces when the source of hot water is a water heater or boiler or 16 ounces depending when the source is recirculation loop or heat traced line. There is a proposal to revise this language still further to address the special case of delivery problems at low flow rate public lavatory faucets. The language from the IAPMO and ICC codes has been shared with several ASHRAE committees including 189.1, 189.2 and 191 for inclusion in their respective standards.

24-1 Distribution Research and Plumbing Codes
Gary Klein, Member
This product contains: Recorded Presentation, Audio (mp3), Slides (pdf)

24-2 Green Plumbing Code
Pete Demarco
This product contains: Recorded Presentation, Audio (mp3), Slides (pdf)