England and Wales: 1950-1966
none of the above
System built, as built, no insulation (assumed)
Solid, no insulation (assumed)
Low energy lighting in 92% of fixed outlets
Pitched, 300 mm loft insulation
Boiler and radiators, wood logs
From main system
wood logs
Fully double glazed
double glazing installed during or after 2002
TRVs and bypass
none of the above
Cavity wall, as built, no insulation (assumed)
Solid, no insulation (assumed)
Low energy lighting in 92% of fixed outlets
Pitched, 100 mm loft insulation
Boiler and radiators, wood logs
From main system
wood logs
Fully double glazed
double glazing installed during or after 2002
TRVs and bypass