England and Wales: 1930-1949
none of the above
System built, with internal insulation
Solid, no insulation (assumed)
Low energy lighting in 90% 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 and room thermostat
ECO assessment
System built, with external insulation
Solid, no insulation (assumed)
Low energy lighting in 10% 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, unknown install date
Programmer, TRVs and bypass