England and Wales: before 1900
marketed sale
Sandstone, as built, no insulation (assumed)
Suspended, no insulation (assumed)
Low energy lighting in all fixed outlets
Pitched, insulated at rafters
Electric storage heaters
Electric immersion, off-peak
electricity (not community)
Room heaters, electric
Full secondary glazing
secondary glazing
Automatic charge control
marketed sale
Granite or whinstone, with internal insulation
Solid, insulated
Low energy lighting in all fixed outlets
Pitched, 100 mm loft insulation
Boiler and radiators, oil, Boiler and underfloor heating, oil
From main system
oil (not community)
Room heaters, dual fuel (mineral and wood)
High performance glazing
double, known data
Time and temperature zone control