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Table 1 Data and their sources for model development

From: A visual energy performance assessment and decision support tool for dwellings

Information required Data source
Dwelling geometry sub-model  
Number of storeys Terrestrial imagery from Google Maps
Floor area and perimeter Vector map of the area from Ordinance Survey
Height of each storey Vector map from Landmap
Area of the roof Vector map of the area from Ordinance Survey
Area of the exposed walls and windows Vector map of the area from Ordinance Survey
Dwelling physics sub-model  
Degree day region Vector map of the area from Ordinance Survey
Height above sea level (m) Vector map of the area from Ordinance Survey
Mean wind speed Data tables provided in SAP
Level of over-shading Raster imagery from Ordinance Survey and Google Maps
Dwelling detachment (mid or end terraced, semidetached, detached, flat, etc.) Vector map of the area from Ordinance Survey
Dwelling Age (Before 1900, 1900–1929, 1930–1949 1950–1966, 1967–1975, 1976–1982, 1983–1990, 1991–1995, 1996–2002, 2003–2006, 2007 – Onwards) Vector map of the area from Landmap, raster imagery from Ordinance Survey and Google Maps
U Value for walls and windows Inferred from age of the building and raster imagery
U Value for floor and roof Inferred from age of the dwelling
Draught proofing Inferred from economic deprivation data from ONS
Type of window and door frame Terrestrial imagery from Google Maps
Orientation of windows Raster imagery from Ordinance Survey and Google Maps
Number of flues, chimneys Raster imagery from Ordinance Survey and Google Maps
Number of fans and vents Inferred from age of the dwelling
Presence of mechanical ventilation Assumed no mechanical ventilation
Type of water heater (gas, oil or solid fuel boiler, electric immersion.) HEED
If hot water tank present its volume, thickness of insulation, thermostat and insulation of primary pipework Default SAP values depending on age of the dwelling
Dwelling usage sub-model  
Heating system type e.g. open, sealed, etc. and fuel e.g. gas, oil, solid fuel, electric, etc. HEED and EHCS
Efficiency of the heating system Inferred based on HEED and EHCS data
Type of heating controls (programmers, thermostats) Inferred based on HEED and EHCS data
Type of cooking system (electric cooker, cooking range, etc.) Inferred based on HEED and EHCS data
Total number of lighting outlets and proportion of low energy lights Inferred based on economic deprivation data from ONS, HEED and EHCS data
Number of occupants Census data from ONS
Heating periods Inferred based on economic deprivation data from ONS
Demand temperatures Inferred based on economic deprivation data from ONS
Level of use of hot water, lights and cooking (average, below average and above average) Inferred based on economic deprivation data from ONS