England and Wales: 1930-1949
rental
Cavity wall, filled cavity
Solid, no insulation (assumed)
Low energy lighting in all fixed outlets
Pitched, 250 mm loft insulation
Air source heat pump, radiators, electric
Electric immersion, off-peak
electricity (not community)
Fully double glazed
double glazing installed before 2002
Programmer, TRVs and bypass
rental
Cavity wall, filled cavity
Solid, no insulation (assumed)
Low energy lighting in all fixed outlets
Pitched, 200 mm loft insulation
Air source heat pump, radiators, electric
From main system
electricity (not community)
Fully double glazed
double glazing installed before 2002
Programmer, TRVs and bypass