England and Wales: before 1900
marketed sale
Solid brick, as built, insulated (assumed)
Solid, limited insulation (assumed)
Low energy lighting in 4% of fixed outlets
Roof room(s), insulated (assumed)
Boiler and radiators, mains gas
Electric immersion, off-peak
mains gas (not community)
Room heaters, electric
Partial double glazing
double glazing installed before 2002
Programmer, TRVs and bypass
marketed sale
Solid brick, as built, no insulation (assumed)
Solid, no insulation (assumed)
Low energy lighting in 5% of fixed outlets
Pitched, 100 mm loft insulation
Boiler and radiators, mains gas
From main system, no cylinder thermostat
mains gas (not community)
Room heaters, electric
Mostly double glazing
double glazing installed before 2002
Programmer, TRVs and bypass