England and Wales: before 1900
marketed sale
Granite or whinstone, as built, no insulation (assumed)
Solid, no insulation (assumed)
Low energy lighting in 20% of fixed outlets
Roof room(s), no insulation (assumed)
Boiler and radiators, oil
From main system
oil (not community)
Full secondary glazing
secondary glazing
TRVs and bypass
rental
Sandstone or limestone, as built, no insulation (assumed)
Solid, no insulation (assumed)
Low energy lighting in 75% of fixed outlets
Roof room(s), ceiling insulated
Boiler and radiators, oil
From main system
oil (not community)
Room heaters, wood logs
Multiple glazing throughout
not defined
Programmer, room thermostat and TRVs