In this report, we have explored various data sources that can supplement an energy performance certificate (EPC) and related aspects which can influence the feasibility of including such data in EPC assessments. Hereto, the following elements are elaborated in the inventory of data variables and the literature review:
- Inventory of data variables
- The nature of data available on individual building energy use
- The accessibility of the data for the use within EPC schemes, including an exploration of (energy) databases
- Identification (measurement) and post-processing methods
- Literature review regarding the impact of incorporating the data into the EPC methodology
- Identification of the uncertainty in building performance analyses
- Identification of the impact of occupant behaviour
- Incorporation of measurement data in the EPC assessment
To build the inventory of data variables, we started from a wide perspective and listed all possible data variables that can be monitored, controlled and estimated in a building. This resulted in a spreadsheet (see the Annex of this report) including 175 data variables related to the building geometry, building envelope, boundary conditions, occupant behaviour, HVAC systems and energy performance.
After the full inventory of data has been established, we have focused on two categories of data inputs: (1) measurable varying data variables and (2) measurable fixed data variables to supplement or replace EPC inputs.