Kentucky Energy Efficiency Program for Schools KEEPS Energy Management Toolkit

1. KEEPS Energy Management ToolkitStep 2: Assess Performance & OpportunitiesToolkit 2H: Water Heating • Step 2 • Assess Performance & Opportunities • Toolkit 2h • Water Heating Kentucky Energy Efficiency Program for Schools KEEPS Energy Management Toolkit

2. KEEPS Energy Management Toolkit KEEPS Energy Management ToolkitToolkit 2H: Water Heating Toolkit 2h Water Heating

3. Make the Commitment Assess Performance and Opportunities Set Performance Goals Create an Action Plan Implement the Action Plan Evaluate Progress Recognize Achievements 7-Step Energy Management Process

4. Water Heating Overview • KEEPS On-site Energy Assessment Form • Determining System Efficiency • KEEPS Water Heating Tool • Identifying Areas for Savings • Maintenance (flushing of sediment) • Temperature reduction • Timers (electric heater and recirculation pump) • System replacement 4

5. KEEPS On-site Energy Assessment Form (Water Heating & Fixtures) 5

6. Determining Efficiency of Systemby AHRI

7. Determining Efficiency of Systemby AHRI slide 2

8. Determining Efficiency of Systemby AHRI slide 3

9. Determining Efficiency of Systemby AHRI slide 4

10. Determining Efficiency of Systemby Serial Number

11. Energy Factor vs. Thermal Efficiency Energy Factor = heating element energy loss + standby tank loss • Residential-size tanks only (about 75 gal. or less) • EF is determined by test procedure with 6 equal draws of hot water over a 24-hour time period totaling 64.3 gallons Thermal Efficiency = heating element energy loss • Commercial-size tanks only (about 75 gal. or more) • TE is determined strictly by the energy loss in the water heating process—commercial water usage varies widely between commercial sectors and therefore a typical daily hot water draw can not be assumed • Tankless systems = 0.85 – 0.98 EF/TE For calculating purposes, we will assume that EF is “18” less than TE.

12. Completed KEEPS Water Heating Tool 12

13. Maintenance (Flushing) Recommended at least annually Reduces wear on anode Increases transfer efficiency Increased tank capacity Increased life expectancy 13

14. Temperature Reduction Cost = $0 3-5% annual energy cost savings per 10°F reduction http://www.energysavers.gov Payback = Immediate 14

15. Timer Applications Electric water heaters • Reduced tank standby loss • Installed cost = $100 per timer • Annual savings = $50/timer • Payback = 2 years Recirculation pump • Reduced pipe standby loss • Installed cost = $100 per timer • Annual savings = > $100 • Payback = < 1 year 15

16. Water Heater Replacement Expected life = 15 years Tankless unit cost = $2,500 (.96 EF) Heat pump unit cost = $2,500 (2.25 COP) Cost = $9,000 for solar Simple payback (heat pump) = 1-5 years Simple payback (tankless) = 1-5 years Simple payback (solar) = 12 years 16

17. KEEPS Report Input Locate “Water Heating” in the KEEPS Assessment Report and modify respective figures and other necessary words/sentences for your specific school. Modify the inset boxes with the results calculated from the KEEPS Water Heating Tool. 17

18. Available for download from the KEEPS Toolkit Library http://www.kppc.org/KEEPS Resources

19. End of Presentation Kentucky Energy Efficiency Program for Schools • (502) 852-0965 • www.kppc.org/KEEPS KEEPS is funded by the American Recovery and Reinvestment Act through the combined efforts of the Kentucky Department for Energy Development and Independence, the U.S. Department of Energy and KPPC.