England and Wales: 1900-1929
none of the above
Cavity wall, as built, no insulation (assumed)
To unheated space,  no insulation (assumed)
Low energy lighting in 12% of fixed outlets
Pitched, no insulation (assumed)
Boiler and radiators, mains gas
From main system, no cylinder thermostat
mains gas (not community)
Fully double glazed
double glazing installed during or after 2002
Programmer, room thermostat and TRVs
none of the above
Cavity wall, filled cavity
To unheated space,  no insulation (assumed)
Low energy lighting in 12% of fixed outlets
Pitched, no insulation (assumed)
Boiler and radiators, mains gas
From main system, no cylinder thermostat
mains gas (not community)
Fully double glazed
double glazing installed during or after 2002
Programmer, room thermostat and TRVs