England and Wales: before 1900
marketed sale
Solid brick, as built, no insulation (assumed)
Solid, no insulation (assumed)
Low energy lighting in 50% of fixed outlets
Pitched, insulated at rafters
Boiler and radiators, dual fuel (mineral and wood)
From main system
dual fuel - mineral + wood
Room heaters, dual fuel (mineral and wood)
Mostly double glazing
double glazing installed during or after 2002
TRVs and bypass
rental
Timber frame, with additional insulation
Solid, insulated
Low energy lighting in all fixed outlets
Pitched, 200 mm loft insulation
Boiler and radiators, oil
From main system
oil (not community)
Fully double glazed
double glazing installed during or after 2002
Programmer, room thermostat and TRVs