Energy Rating Index (R406)

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2 Energy Rating Index (R406) NEW Prescriptive Prescriptive Simulated Performance Energy Rating Index R-Value (No Tradeoffs) U-Factor (component tradeoffs) Total UA (tradeoffs between components) Simulated Performance Approach R405 ERI Compliance Alternative R406 2

3 Energy Rating Index (ERI)(R406) Completed by an approved third party with documentation, including compliance reports, that must be reviewed by the code official. It makes sense that ERI Raters become ICC certified as Residential Energy Inspectors

4 RESNET and ICC have a partnership to advance and coordinate the use of the ERI as a code compliance path. 4

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6 How Ratings Are Used 6

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10 Residential Energy Services Network (RESNET) Software Companies Quality Assurance Providers Quality Assurance Designee (QAD) HERS Raters & Rating Field Inspectors (RFI) HERS Training Providers 10

11 Residential Energy Services Network (RESNET) Software Companies Quality Assurance Providers Quality Assurance Designee (QAD) HERS Raters & Rating Field Inspectors (RFI) HERS Training Providers 11

12 Home Energy Ratings Quality 10%-1% Assurance 12

13 Approved Software: REM/Rate 15.5, NORESCO EnergyGauge US V6.0 Florida Solar Energy Center Ekotrope HERS Module Version V2.2, Ekotrope International Beacon Residential Version, ICF Right-Energy HERS, Wrightsoft Corporation 13

14 HERS Rater Requirements 5-6 Day Training Course National Rater Test (2-hour online) Rater Practical Test (2-hour online simulation) Combustion Appliance Zone (CAZ) Test (2-hr online simulation) CAZ Work Scope Test(2-hour online) Complete five supervised probationary ratings Associate with QA Provider Maintain continuing education requirements 14

15 Rating Key Concepts Reference Design Proposed Design Geometric Twins 15

16 Rating Key Concepts Asset Based Occupant Behavioral Neutral 16

17 Energy Rating Index (ERI)(R406) 100 equates to the levels prescribed in the 2006 IECC Zero is equivalent to a net-zero-energy home RESNET s Home Energy Rating System (HERS) Rating System Only Current Option House must also meet the minimum envelope requirements of the 2009 IECC and all of the mandatory code provisions. 17

18 How Does HERS Index Work? Reference Building is given an Index of 100 A 1% improvement in building energy performance results in a one index point reduction For Example: Index of 120 means the building uses 20% more energy than the Reference Building Index of 50 means the building uses half the energy of the Reference Building Index of zero means the building produces exactly as much energy as it uses. 18

19 Renewables in the ERI Compliance Path Renewable Energy May Now Be Included Without renewables backstop is 2009 IECC for thermal envelope. With renewables backstop is 2015 IECC for thermal envelope. 19

20 HERS Rating Index Standard Assumptions Impact of Occupant Behavior Thermostat Set Points Hot Water Temperature and Usage Interior Window Shading Standard assumptions are used for these factors when the HERS Index is calculated. 20

21 Energy Rating Index (ERI)(R406) NEW ANSI/RESNET/ICC Basis of ERI approach 21

22 Two Types of Ratings Projected Ratings Ratings performed prior to the construction (from plans) of a home or prior to the installation of energy improvements to an existing home (site inspection). Confirmed Ratings Ratings completed using data gathered from an on-site inspection, which usually includes performance testing of the home. For Code Compliance 22

23 REM/Rate Rating Software Building Math, Plans, and Utility Rates 23

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25 Rating Software Data Inputs 25

26 Data Input Owner, Builder, Address Info 26

27 Data Inputs Weather Data 27

28 Data Inputs Energy Costs 28

29 Data Inputs Robust Help Screens 29

30 Data Inputs Windows 30

31 Data Inputs Libraries 31

32 Data Inputs Ceilings 32

33 Data Inputs Mechanical 33

34 Data Inputs Duct System 34

35 Data Inputs Ventilation 35

36 Data Inputs Infiltration 36

37 REM/Rate Reports 37

38 REM/Rate Reports 38

39 REM/Rate Reports 39

40 REM/Rate Reports 40

41 REM/Rate Reports 41

42 Presentations Online /Energy /Energy Code Training Presentations 42