England and Wales: 1900-1929
marketed sale
Solid brick, as built, no insulation (assumed)
Solid, no insulation (assumed)
Low energy lighting in 44% of fixed outlets
Roof room(s), no insulation (assumed)
Boiler and radiators, wood logs
Electric immersion, standard tariff
wood logs
Room heaters, electric
Fully double glazed
double glazing installed before 2002
TRVs and bypass
marketed sale
Cavity wall, as built, no insulation (assumed)
Solid, no insulation (assumed)
Low energy lighting in 75% of fixed outlets
Pitched, 100 mm loft insulation
Boiler and radiators, wood logs
Electric immersion, off-peak
wood logs
Room heaters, dual fuel (mineral and wood)
Mostly double glazing
double glazing installed before 2002
TRVs and bypass