England and Wales: before 1900
non marketed sale
Granite or whinstone, as built, no insulation (assumed)
To unheated space, no insulation (assumed)
Low energy lighting in 18% of fixed outlets
Pitched, no insulation
No system present: electric heaters assumed
No system present: electric immersion assumed
To be used only when there is no heating/hot-water system
Mostly double glazing
double glazing installed during or after 2002
marketed sale
Granite or whinstone, as built, no insulation (assumed)
To unheated space, no insulation (assumed)
Low energy lighting in 33% of fixed outlets
Pitched, 300 mm loft insulation
Boiler and radiators, mains gas
From main system
mains gas (not community)
Fully double glazed
double glazing installed during or after 2002
Programmer, room thermostat and TRVs