England and Wales: before 1900
marketed sale
Solid brick, as built, no insulation (assumed)
Suspended, no insulation (assumed)
No low energy lighting
Pitched, no insulation
Boiler and radiators, oil
From main system
oil (not community)
Single glazed
not defined
TRVs and bypass
marketed sale
Solid brick, as built, no insulation (assumed)
Solid, no insulation (assumed)
Low energy lighting in 80% of fixed outlets
Pitched, 300 mm loft insulation
Boiler and radiators, wood pellets
From main system
bulk wood pellets
Room heaters, wood logs
Fully double glazed
double glazing installed during or after 2002
Programmer and at least two room thermostats