England and Wales: 1950-1966
none of the above
Cavity wall, as built, no insulation (assumed)
Solid, no insulation (assumed)
No low energy lighting
Pitched, 75 mm loft insulation
No system present: electric heaters assumed
No system present: electric immersion assumed
To be used only when there is no heating/hot-water system
Fully double glazed
double glazing installed before 2002
none of the above
Cavity wall, filled cavity
Solid, no insulation (assumed)
Low energy lighting in 85% of fixed outlets
Pitched, no insulation
Boiler and radiators, mains gas
From main system
mains gas (not community)
Fully double glazed
double glazing installed during or after 2002
Programmer, no room thermostat