England and Wales: before 1900
marketed sale
Granite or whinstone, as built, no insulation (assumed)
Solid, no insulation (assumed)
Low energy lighting in 74% of fixed outlets
Pitched, 75 mm loft insulation
Boiler and radiators, dual fuel (mineral and wood)
From main system, plus solar
dual fuel - mineral + wood
Room heaters, dual fuel (mineral and wood)
Mostly double glazing
double glazing installed during or after 2002
TRVs and bypass
marketed sale
Granite or whinstone, as built, no insulation (assumed)
Solid, no insulation (assumed)
Low energy lighting in all fixed outlets
Pitched, 300 mm loft insulation
Boiler and radiators, LPG
From main system, plus solar
LPG (not community)
Room heaters, dual fuel (mineral and wood)
Fully double glazed
double glazing installed during or after 2002
Programmer, room thermostat and TRVs