England and Wales: 2003-2006
marketed sale
Cavity wall, as built, insulated (assumed)
Solid, insulated (assumed)
Low energy lighting in 14% of fixed outlets
Roof room(s), insulated (assumed)
No system present: electric heaters assumed
No system present: electric immersion assumed, plus solar
To be used only when there is no heating/hot-water system
Fully double glazed
double glazing installed during or after 2002
marketed sale
Cavity wall, as built, insulated (assumed)
Solid, insulated (assumed)
Low energy lighting in all fixed outlets
Roof room(s), insulated (assumed)
Boiler and radiators, mains gas
From main system, plus solar
mains gas (not community)
Fully double glazed
double glazing installed during or after 2002
Programmer, room thermostat and TRVs