England and Wales: before 1900
marketed sale
Granite or whinstone, as built, no insulation (assumed)
(another dwelling below)
Low energy lighting in all fixed outlets
Pitched, 270 mm loft insulation
Boiler and radiators, mains gas
From main system
mains gas (not community)
Single glazed
not defined
TRVs and bypass
marketed sale
Solid brick, with internal insulation
Solid, no insulation (assumed)
Low energy lighting in all fixed outlets
Pitched, limited insulation
Room heaters, electric
From main system
electricity (not community)
Full secondary glazing
secondary glazing
Programmer and appliance thermostats