England and Wales: 1900-1929
marketed sale
Cavity wall, as built, no insulation (assumed)
Suspended, no insulation (assumed)
Low energy lighting in 18% of fixed outlets
Roof room(s), no insulation (assumed)
Boiler and radiators, mains gas
No system present: electric immersion assumed
mains gas (not community)
Room heaters, mains gas
Mostly double glazing
double glazing installed before 2002
TRVs and bypass
marketed sale
Cavity wall, as built, no insulation (assumed)
Solid, no insulation (assumed)
Low energy lighting in 36% of fixed outlets
Pitched, insulated
Boiler and radiators, mains gas
From main system
mains gas (not community)
Fully double glazed
double glazing installed during or after 2002
Programmer, room thermostat and TRVs