used to calculate and verify deemed measure savings cannot be site specific. The use of site specific equipment information in determining savings implies the measure is custom (or calculated). For this reason, the application of existing conditions baseline to deemed measures must involve approved work papers that establish reliable aggregate data reflective of the existing condition and circumstance (buildings, customers, climate zones, etc.) where a measure is applied. Existing conditions are much more variable than code conditions. This fact exacerbates the potential for error in determining reasonably assured deemed savings values for existing conditions baseline. On the other hand, variance in the existing condition might be largely explained by observable parameters, and where this is the case, the variance of existing condition will be lower within the sub-population defined by those parameters. Thus, we encourage the Program Administrators to examine sub-populations where there are similar existing conditions, and to assess the vintage, efficiency and natural turnover of equipment therein to identify program opportunities with reasonably predictable savings. Examples of observable parameters that may predict or explain existing conditions include: building type, building size, business type, business size, business activity, equipment type, building ownership (own versus rent), lease length, local economic conditions and climate. Additional discussion of deemed measure considerations can be found in the section titled Deemed Measure Preponderance of Evidence on page 42 of this Resolution, and Section 7 of the preponderance of evidence guidance document. Installation Type Definitions of installation types were one of the key issues in the measure level baseline working group. Shell and building systems is a relatively new concept, and not a segmentation that is currently built into the portfolio of measures. The installation type issues of concern include: What should be included in the shell and building system category? (Working group members were not confused by the definition or
used to calculate and verify deemed measure savings cannot be site specific. The use of site specific equipment information in determining savings implies the measure is custom (or calculated). For this reason, the application of existing conditions baseline to deemed measures must involve approved work papers that establish reliable aggregate data reflective of the existing condition and circumstance (buildings, customers, climate zones, etc.) where a measure is applied. Existing conditions are much more variable than code conditions. This fact exacerbates the potential for error in determining reasonably assured deemed savings values for existing conditions baseline. On the other hand, variance in the existing condition might be largely explained by observable parameters, and where this is the case, the variance of existing condition will be lower within the sub-population defined by those parameters. Thus, we encourage the Program Administrators to examine sub-populations where there are similar existing conditions, and to assess the vintage, efficiency and natural turnover of equipment therein to identify program opportunities with reasonably predictable savings. Examples of observable parameters that may predict or explain existing conditions include: building type, building size, business type, business size, business activity, equipment type, building ownership (own versus rent), lease length, local economic conditions and climate. Additional discussion of deemed measure considerations can be found in the section titled Deemed Measure Preponderance of Evidence on page 42 of this Resolution, and Section 7 of the preponderance of evidence guidance document. Installation Type Definitions of installation types were one of the key issues in the measure level baseline working group. Shell and building systems is a relatively new concept, and not a segmentation that is currently built into the portfolio of measures. The installation type issues of concern include: What should be included in the shell and building system category? (Working group members were not confused by the definition or