England and Wales: 1930-1949
none of the above
System built, as built, no insulation (assumed)
Solid, no insulation (assumed)
No low energy lighting
Pitched, no insulation
Boiler and radiators, mains gas
From main system
mains gas (not community)
Room heaters, mains gas
Fully double glazed
double glazing installed before 2002
Programmer, TRVs and bypass
not sale or rental
System built, with external insulation
Solid, no insulation (assumed)
Low energy lighting in 90% of fixed outlets
Pitched, 250 mm loft insulation
Boiler and radiators, mains gas, Room heaters, mains gas
From main system
mains gas (not community)
Room heaters, electric
Fully double glazed
double glazing, unknown install date
Programmer, room thermostat and TRVs