England and Wales: 1967-1975
none of the above
System built, as built, no insulation (assumed)
Solid, no insulation (assumed)
Low energy lighting in 50% of fixed outlets
Pitched, 270 mm loft insulation
Electric storage heaters
Electric immersion, off-peak
electricity (not community)
Room heaters, electric
Fully double glazed
double glazing, unknown install date
Automatic charge control
none of the above
System built, with external insulation
Solid, no insulation (assumed)
Low energy lighting in 67% of fixed outlets
Pitched, 270 mm loft insulation
Electric storage heaters
Electric immersion, off-peak
electricity (not community)
Room heaters, electric
Fully double glazed
double glazing, unknown install date
Automatic charge control