England and Wales: 1900-1929
marketed sale
Solid brick, as built, no insulation (assumed)
Suspended, no insulation (assumed)
Low energy lighting in 25% of fixed outlets
Pitched, no insulation
Room heaters, smokeless fuel
Gas multipoint
smokeless coal
Portable electric heaters (assumed)
Some double glazing
double glazing, unknown install date
No thermostatic control of room temperature
marketed sale
Solid brick, with internal insulation
To unheated space, insulated
Low energy lighting in all fixed outlets
Pitched, no insulation (assumed)
Boiler and radiators, mains gas
From main system
mains gas (not community)
Room heaters, electric
Fully double glazed
double glazing installed before 2002
Programmer, room thermostat and TRVs