England and Wales: before 1900
marketed sale
Cavity wall, as built, no insulation (assumed)
(another dwelling below)
Low energy lighting in 75% of fixed outlets
(another dwelling above)
No system present: electric heaters assumed
Gas instantaneous at point of use
To be used only when there is no heating/hot-water system or data is from a community network
Fully double glazed
double glazing installed before 2002
rental
Solid brick, with internal insulation
(another dwelling below)
Low energy lighting in all fixed outlets
(another dwelling above)
Room heaters, electric
Gas multipoint
electricity (not community)
Fully double glazed
double glazing installed during or after 2002
Programmer and appliance thermostats