England and Wales: before 1900
marketed sale
Granite or whinstone, as built, no insulation (assumed)
Solid, no insulation (assumed)
Low energy lighting in 90% of fixed outlets
Thatched, with additional insulation
Boiler and radiators, mains gas
From main system, no cylinder thermostat
mains gas (not community)
Room heaters, mains gas
Fully double glazed
double glazing, unknown install date
Programmer and room thermostat
marketed sale
Granite or whinstone, with internal insulation
Solid, no insulation (assumed)
Low energy lighting in 90% of fixed outlets
Thatched, with additional insulation
Boiler and radiators, mains gas
From main system, no cylinder thermostat
mains gas (not community)
Room heaters, mains gas
Fully double glazed
double glazing, unknown install date
Programmer, TRVs and bypass