England and Wales: 1967-1975
none of the above
System built, with internal insulation
Solid, no insulation (assumed)
Low energy lighting in 60% of fixed outlets
Pitched, 250 mm loft insulation
Boiler and radiators, mains gas
From main system
mains gas (not community)
Fully double glazed
double glazing installed during or after 2002
Programmer, TRVs and bypass
none of the above
System built, with internal insulation
Solid, no insulation (assumed)
Low energy lighting in 60% of fixed outlets
Pitched, 250 mm loft insulation
Boiler and radiators, mains gas
From main system
mains gas (not community)
Fully double glazed
double, known data
Programmer, TRVs and bypass