England and Wales: 1930-1949
marketed sale
Cavity wall, as built, no insulation (assumed)
Suspended, no insulation (assumed)
Low energy lighting in 8% of fixed outlets
Pitched, no insulation
No system present: electric heaters assumed
Gas multipoint
To be used only when there is no heating/hot-water system or data is from a community network
Mostly double glazing
double glazing installed during or after 2002
rental
Cavity wall, as built, no insulation (assumed)
Suspended, no insulation (assumed)
Low energy lighting in all fixed outlets
Pitched, 270 mm loft insulation
Boiler and radiators, mains gas
From main system
mains gas (not community)
Fully double glazed
double glazing installed before 2002
Programmer, room thermostat and TRVs