England and Wales: before 1900
marketed sale
Solid brick, as built, no insulation (assumed)
Suspended, no insulation (assumed)
Low energy lighting in 50% of fixed outlets
Pitched, no insulation
Room heaters, mains gas
Gas instantaneous at point of use
mains gas (not community)
Portable electric heaters (assumed)
Single glazed
not defined
Appliance thermostats
none of the above
Solid brick, as built, no insulation (assumed)
Solid, no insulation (assumed)
No low energy lighting
Pitched, no insulation
Boiler and radiators, mains gas
From main system
mains gas (not community)
Fully double glazed
double glazing, unknown install date
Programmer, room thermostat and TRVs