England and Wales: before 1900
rental (private)
Solid brick, as built, no insulation (assumed)
(other premises below)
No low energy lighting
(another dwelling above)
No system present: electric heaters assumed
Gas boiler/circulator, no cylinder thermostat
To be used only when there is no heating/hot-water system
Fully double glazed
double glazing installed during or after 2002
rental (private)
Solid brick, as built, no insulation (assumed)
(other premises below)
Low energy lighting in all fixed outlets
(another dwelling above)
Boiler and radiators, mains gas
From main system
mains gas (not community)
Fully double glazed
double glazing, unknown install date
TRVs and bypass