England and Wales: 1930-1949
none of the above
Solid brick, with external insulation
Suspended, no insulation (assumed)
No low energy lighting
Pitched, no insulation (assumed)
No system present: electric heaters assumed
No system present: electric immersion assumed
To be used only when there is no heating/hot-water system
Fully double glazed
double glazing installed during or after 2002
none of the above
Solid brick, with external insulation
Suspended, no insulation (assumed)
No low energy lighting
Pitched, no insulation (assumed)
Boiler and radiators, mains gas
No system present: electric immersion assumed
mains gas (not community)
Fully double glazed
double glazing installed during or after 2002
TRVs and bypass