COTE Presents: Right-Sizing Residential Plumbing with the Water Demand Calculator

AIA Long Beach / South Bay & Southern California Edison, a Collaborative Partnership

1.0 AIA LU/HSW

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Description:

This session will cover the benefits of using the California Plumbing Code’s Water Demand Calculator (WDC) to size plumbing in homes and apartment buildings. It is a solution that reduces water aging, delivers hot water faster, generates significant construction cost savings, reduces the carbon footprint of the structure, and subsequently saves on water- and water heating-related utility bills for the entire life of the plumbing system. Effective July 1, 2024, the WDC became part of the California Plumbing Code (as Appendix M). Instead of using flow rates and flush volumes from the 1940s, the WDC will allow plumbing designers to “right-size” the cold and hot water distribution systems in homes and apartment buildings using modern information about flow rates and simultaneous use.

Learning Objectives:

• Differentiate the conditions that existed for the “default” water supply demand sizing method from the conditions that are incorporated into the Water Demand Calculator (WDC) when selecting a method for sizing peak water demand.
• Describe the savings in cost, water, energy, and carbon emissions achieved by using the WDC in the plumbing design of a multifamily building
• Summarize the reduced public health and safety risk as well as water quality benefit of plumbing systems designed using the WDC when justifying the use of the WDC.
• Locate instructional resources for using the WDC in the plumbing designs of upcoming projects.

Speaker:

Gary Klein, President of Gary Klein & Associates has been intimately involved in energy efficiency and renewable energy since 1974. Mr. Klein has a passion for hot water: getting into it, getting out of it and efficiently delivering it to meet customers’ needs. He works to simplify building codes and to get architects and builders to use plumbing systems that, by their design, deliver hot water quickly and with minimal waste.

After serving 19 years with the California Energy Commission, he has provided consulting on sustainability since 2008. Mr. Klein received a BA from Cornell University in 1975 with an Independent Major in Technology and Society with an emphasis on energy conservation and renewable energy.