England and Wales: before 1900
marketed sale
Solid brick, as built, no insulation (assumed)
Suspended, no insulation (assumed)
Low energy lighting in 20% of fixed outlets
Pitched, no insulation (assumed)
No system present: electric heaters assumed
Gas multipoint
To be used only when there is no heating/hot-water system
Single glazed
not defined
marketed sale
Solid brick, as built, no insulation (assumed)
Solid, insulated
No low energy lighting
Pitched, 100 mm loft insulation
Boiler and radiators, mains gas
From main system
mains gas (not community)
Room heaters, smokeless fuel
Partial double glazing
double glazing installed during or after 2002
Programmer and room thermostat