England and Wales: 1900-1929
non marketed sale
Solid brick, as built, no insulation (assumed)
Suspended, no insulation (assumed)
Low energy lighting in 40% of fixed outlets
Pitched, no insulation (assumed)
Boiler and radiators, mains gas
From main system
mains gas (not community)
Room heaters, coal
Mostly double glazing
double glazing installed during or after 2002
Programmer, TRVs and bypass
non marketed sale
Solid brick, as built, no insulation (assumed)
Suspended, insulated
Low energy lighting in all fixed outlets
Flat, insulated
Boiler and underfloor heating, mains gas
From main system
mains gas (not community)
Fully double glazed
double glazing installed during or after 2002
Time and temperature zone control