California End Use Survey (CEUS) provided the initial peer-group data that
underlay the benchmarking process for EnergyIQ. CEUS is a highly detailed
survey of approximately 2800 non-residential premises across California, based
on a stratified random sampling across utility regions, climate zones, building types, and building size. In contrast to
surveys relying on self-reporting, CEUS employed on-site surveys of building
characteristics and monthly utility billing data. Short-term data logging
and/or interval metering was performed at some sites. Energy intensities are
derived from calibrated simulations, based on characteristics collected at the
sites. The CEUS data are of unprecedented quality and detail. This enables a
higher level of granularity in the benchmarking, ranging from campuses, to
buildings, to systems, and to components.
The CBECS was first conducted in 1979 and is currently conducted on a quadrennial basis by the Energy Information Administration (EIA). The CBECS is conducted in two data-collection stages: a Building Characteristics Survey and an Energy Suppliers Survey. The Energy Suppliers Survey is initiated only if the respondents to the Building Characteristics Survey cannot provide the energy consumption and expenditures information, or the information provided fails edits within the survey instrument. The Building Characteristics Survey collects information through voluntary interviews with the buildings’ owners, managers, or tenants. Respondents are asked questions about the building size, how the building is used, types of energy-using equipment and conservation measures that are present in the building, the types of energy sources used, and the amount and cost of energy used in the building.There may be differences between CBECS calculated average EUI values and EnergyIQ values due to EnergyIQ excluding CBECS buildings that:
The population-weighted median EUI for the EnergyIQ facilities may be very different even if there was just one or two facilities dropped from the population.