England and Wales: 1930-1949
none of the above
Solid brick, as built, no insulation (assumed)
Solid, insulated
Low energy lighting in 50% of fixed outlets
Pitched, no insulation
Room heaters, electric
No system present: electric immersion assumed
electricity (not community)
Portable electric heaters (assumed)
Fully double glazed
double glazing installed during or after 2002
Appliance thermostats
RHI application
Solid brick, with internal insulation
Solid, insulated
Low energy lighting in 91% of fixed outlets
Pitched, 250 mm loft insulation
Air source heat pump, underfloor, electric
From main system
electricity (not community)
Room heaters, dual fuel (mineral and wood)
Fully double glazed
double glazing installed during or after 2002
Time and temperature zone control