England and Wales: 1900-1929
marketed sale
Solid brick, as built, no insulation (assumed)
Solid, no insulation (assumed)
Low energy lighting in 67% of fixed outlets
Pitched, 150 mm loft insulation
Boiler and radiators, wood logs
Gas multipoint
wood logs
Room heaters, wood logs
Fully double glazed
double glazing installed before 2002
TRVs and bypass
RHI application
Solid brick, with internal insulation
Solid, insulated
Low energy lighting in all fixed outlets
Pitched, 270 mm loft insulation
Air source heat pump, radiators, electric
From main system
electricity (not community)
Fully double glazed
double glazing installed during or after 2002
Time and temperature zone control