England and Wales: 1967-1975
marketed sale
Timber frame, as built, partial insulation (assumed)
To unheated space,  no insulation (assumed)
Low energy lighting in 18% of fixed outlets
Flat, limited insulation (assumed)
Boiler and radiators, mains gas
From main system
mains gas (not community)
Fully double glazed
double glazing installed during or after 2002
Programmer, TRVs and bypass
marketed sale
System built, as built, no insulation (assumed)
To unheated space,  no insulation (assumed)
Low energy lighting in 18% of fixed outlets
Flat, limited insulation (assumed)
Boiler and radiators, mains gas
From main system
mains gas (not community)
Fully double glazed
double glazing installed during or after 2002
Programmer, TRVs and bypass