England and Wales: before 1900
marketed sale
Solid brick, as built, no insulation (assumed)
Solid, no insulation (assumed)
Low energy lighting in all fixed outlets
Flat, insulated (assumed)
Air source heat pump, warm air, electric
Electric immersion, off-peak, plus solar
electricity (not community)
Fully double glazed
double glazing installed during or after 2002
Time and temperature zone control
marketed sale
Solid brick, with internal insulation
Solid, no insulation (assumed)
Low energy lighting in all fixed outlets
Flat, insulated (assumed)
Air source heat pump, warm air, electric
Electric immersion, off-peak, plus solar
electricity (not community)
Fully double glazed
double glazing installed during or after 2002
Time and temperature zone control