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APPENDIX E: GLOSSARY OF TERMS <br />15 x 15: Xcel Energy's privacy rule, which require all data summary statistics to contain at least <br />15 premises, with no single premise responsible for more than 15% of the total. Following these <br />rules, if a premise is responsible for more than 15% of the total for that data set, it is are <br />removed from the summary. <br />British Thermal Unit (BTU): the amount of heat needed to raise one pound of water at <br />maximum density through one degree Fahrenheit <br />Carbon -free: Carbon -free refers to sources of energy that will not emit additional carbon <br />dioxide into the air. Wind, solar and nuclear energy are all carbon free sources but only wind <br />and solar are renewable. <br />Carbon -neutral: Carbon -neutral, also described as "net zero" could include carbon free <br />sources but is broader and refers to energy that removes or avoids as much carbon dioxide as <br />is released over a set period of time. Carbon -neutral is sometimes used to describe a site that <br />produces an excess amount of electricity from a renewable energy source, such as solar, <br />compared to what it consumes. That excess energy is put back into the grid in an amount that <br />offsets the carbon dioxide produced from the electricity it draws from the grid when it is not <br />producing renewable energy. <br />Community Data Mapping: A baseline analysis of energy data in a geospatial (map) format <br />across the community. <br />Conservation Improvement Programs (CIP): Portfolio of approved utility energy efficiency <br />and demand management programs. Minnesota electric utilities have a goal of saving 1.5% of <br />their total energy sales each year via customer conservation efforts. Minnesota natural gas <br />utilities have a goal of saving 0.5% of their total energy sales each year via customer <br />conservation efforts. <br />Roseville Energy Action Plan 45 <br />