England and Wales: 1967-1975
marketed sale
System built, as built, no insulation (assumed)
Solid, no insulation (assumed)
Low energy lighting in 63% of fixed outlets
Pitched, 270 mm loft insulation
No system present: electric heaters assumed
Electric immersion, off-peak
To be used only when there is no heating/hot-water system
Fully double glazed
double glazing installed before 2002
marketed sale
System built, with external insulation
Solid, no insulation (assumed)
Low energy lighting in 73% of fixed outlets
Pitched, 250 mm loft insulation
Room heaters, electric
Electric immersion, off-peak
electricity (not community)
Room heaters, dual fuel (mineral and wood)
Fully double glazed
double glazing installed during or after 2002
Programmer and appliance thermostats