England and Wales: 1950-1966
rental
System built, with external insulation
Solid, no insulation (assumed)
Low energy lighting in all fixed outlets
Flat, no insulation (assumed)
Boiler and radiators, mains gas
From secondary system
mains gas (not community)
Fully double glazed
double glazing, unknown install date
Programmer, TRVs and bypass
rental
System built, as built, no insulation (assumed)
Solid, no insulation (assumed)
Low energy lighting in all fixed outlets
Flat, no insulation (assumed)
Boiler and radiators, mains gas
From main system
mains gas (not community)
Fully double glazed
double glazing, unknown install date
Programmer, TRVs and bypass