England and Wales: 1900-1929
marketed sale
Cavity wall, as built, no insulation (assumed)
Suspended, no insulation (assumed)
Low energy lighting in 75% of fixed outlets
Pitched, 50 mm loft insulation
Boiler and radiators, mains gas
From main system
mains gas (not community)
Room heaters, mains gas
Partial double glazing
double glazing installed before 2002
Programmer, TRVs and bypass
marketed sale
Cavity wall, as built, no insulation (assumed)
Suspended, insulated
Low energy lighting in all fixed outlets
Pitched, insulated (assumed)
Boiler and radiators, electric
From main system
electricity (not community)
Fully double glazed
double glazing installed during or after 2002
Programmer, room thermostat and TRVs