England and Wales: 1900-1929
non marketed sale
Cavity wall, as built, no insulation (assumed)
Solid, no insulation (assumed)
Low energy lighting in 43% of fixed outlets
Pitched, no insulation (assumed)
Room heaters, mains gas
Gas instantaneous at point of use
mains gas (not community)
Portable electric heaters (assumed)
Single glazed
not defined
No thermostatic control of room temperature
non marketed sale
Cavity wall, as built, no insulation (assumed)
Solid, no insulation (assumed)
Low energy lighting in 50% of fixed outlets
Pitched, no insulation (assumed)
Boiler and radiators, mains gas
From main system
mains gas (not community)
Fully double glazed
double glazing installed during or after 2002
TRVs and bypass