England and Wales: before 1900
marketed sale
Timber frame, as built, insulated (assumed)
Solid, insulated (assumed)
Low energy lighting in all fixed outlets
Pitched, insulated (assumed)
Boiler and underfloor heating, mains gas
From main system
mains gas (not community)
Room heaters, wood logs
Fully double glazed
double glazing installed during or after 2002
Programmer and at least two room thermostats
marketed sale
Solid brick, as built, no insulation (assumed)
Solid, no insulation (assumed)
Low energy lighting in 91% of fixed outlets
Pitched, 250 mm loft insulation
Water source heat pump, underfloor, electric, Water source heat pump, radiators, electric
From main system, plus solar
electricity (not community)
Room heaters, wood logs
Some double glazing
double glazing installed during or after 2002
Time and temperature zone control