Glossary

  • annualized weather normal: an estimate of annual energy demand under a weather normal.
  • baseline: a pre-intervention reference point or starting point from which to compare post-intervention energy demand.
  • demand response project: a set of interventions designed to shift the time of day or day of week of energy-demand, generally toward off-peak hours.
  • end use: an energy-consuming service such as lighting, space cooling, space heating, refrigeration, or water heating, particularly as provided by a building or set of buildings.
  • end use demand: the extent to which an end use is needed. May vary by season, occupancy, time of day, day of week, or purpose of building.
  • energy demand: the amount of energy needed to satisfy end use demand.
  • energy trace: see trace
  • intervention: a set of upgrades or performance improvements on physical infrastructure of an existing building (see retrofit), or of behavior of individuals living in an existing building.
  • modeling period: a period of time over which an energy model is to be created for a particular trace. This is a generalization of baseline and reporting periods. Modeling periods generally fall into one of those two categories.
  • projected baseline energy demand: a counterfactual estimate of energy demand as it might have been under a particular end use demand scenario had an intervention not occurred.
  • retrofit: a set of interventions taking place at a particular building or site which modify pre-existing structures, installations or appliances.
  • structural change model: a model which takes tries to determine the most probably extents of baseline and reporting periods for a project given its trace data.
  • trace: a single time series of measured values associated with units at a particular (not necessarily fixed) frequency.
  • trace interpretation: the meaning of the trace data. Possible interpretations are outlined in eemeter.structures
  • weather normalization: a technique to account for differences in end use demand due to variations in weather patterns which uses a model of weather-dependent energy demand to determine a counterfactual energy demand under a weather conditions described by a weather normal.
  • weather normal: a set of (not necessarily observed) weather data designed to reflect a “typical” weather scenario. Often covers a time period of 1 year. Used in weather normalization. See TMY3.
  • ZIP Code Tabulation Area (ZCTA): a set of geographical areas based on US Postal Service (USPS) ZIP codes, necessitated by the fact that ZIP codes do not map easily onto geographies. Built and maintained by the US Census Bureau. Contains only about three quarters of valid ZIP codes. ZIP code and ZCTA do not always match. More information.