Electricity use and savings in the Hood River Conservation Project

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Abstract
The Hood River Conservation Project (HRCP) was intended to test the reasonable upper limits of a residential retrofit program. The retrofits were aimed at the building shell to reduce electricity use for space heating and at water heating retrofits; no heating or water heating equipment was replaced. This report discusses methods and results related to actual electricity use and savings produced by HRCP. The approach first analyzes monthly billing data to produce estimates of weather-adjusted (normalized) annual electricity use. The weather-adjustment method used to convert raw electricity bills into useful estimates of annual electricity use is the Princeton Scorekeeping Method (PRISM). PRISM is applied to data from individual households and to aggregate data (all HRCP participants, and households in Hood River and the two comparison communities - Grants Pass and Pendleton, OR). These estimates of annual electricity use are then used as inputs to pooled time-series/cross-sectional models. These multivariate regression models explain variations in annual electricity use and savings across households and years. Models are developed for both program participants and households in the three communities. The primary purposes of these models are to identify the net (as well as total) electricity savings attributable to HRCP and to quantify themore » effects of various factors (including participation in HRCP) on electricity use and savings.« less

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