England and Wales: 1900-1929
marketed sale
Cavity wall, as built, no insulation (assumed)
Suspended, no insulation (assumed)
Low energy lighting in 53% of fixed outlets
Pitched, no insulation
Boiler and radiators, mains gas
From main system
mains gas (not community)
Room heaters, smokeless fuel
Mostly double glazing
double glazing installed during or after 2002
Programmer, room thermostat and TRVs
RHI application
Cavity wall, with internal insulation
Suspended, no insulation (assumed)
Low energy lighting in 91% of fixed outlets
Pitched, 150 mm loft insulation
Air source heat pump, underfloor, electric
From main system
electricity (not community)
Fully double glazed
double glazing installed during or after 2002
Time and temperature zone control