England and Wales: 1900-1929
marketed sale
Cavity wall, as built, no insulation (assumed)
Solid, no insulation (assumed)
Low energy lighting in all fixed outlets
Pitched, no insulation (assumed)
No system present: electric heaters assumed
Electric instantaneous at point of use
To be used only when there is no heating/hot-water system
Mostly double glazing
double glazing installed during or after 2002
marketed sale
Cavity wall, as built, no insulation (assumed)
Solid, no insulation (assumed)
Low energy lighting in 97% of fixed outlets
Roof room(s), no insulation (assumed)
Boiler and radiators, electric
Electric instantaneous at point of use
electricity (not community)
Mostly double glazing
double glazing installed during or after 2002
Programmer, TRVs and bypass