SAVINGS OPPORTUNITIES REPORT
Energy and Carbon Savings Opportunities
ARUP was commissioned by IAPMO to analyze the Water Demand Calculator (WDC) developed by IAPMO to better understand its potential for energy and embodied carbon savings. This energy and embodied carbon savings analysis compared the Water Demand Calculator with the Hunters Curve method included in the International Plumbing Code (IPC) and Uniform Plumbing Code (UPC) for sizing domestic hot water systems in four residential use cases. Currently, the WDC is available for use in UPC Appendix M, WE•Stand, and as a standalone document.
- IAPMO developed the Water Demand Calculator in response to the consistent oversizing of potable water distribution systems in the built environment.
- IAPMO contracted ARUP to calculate operational energy savings, embodied carbon savings, and water savings using the WDC for four common building types.
- ARUP has vetted the Water Demand Calculator for its completeness, and it is easy to adopt.