England and Wales: 1950-1966
RHI application
Cavity wall, as built, no insulation (assumed)
Suspended, no insulation (assumed)
Low energy lighting in 65% of fixed outlets
Pitched, 250 mm loft insulation
Boiler and radiators, mains gas
From main system
mains gas (not community)
Room heaters, mains gas
Partial double glazing
double glazing installed before 2002
Programmer, TRVs and bypass
RHI application
Cavity wall, filled cavity
Suspended, no insulation (assumed)
Low energy lighting in 71% of fixed outlets
Pitched, 270 mm loft insulation
Air source heat pump, radiators, electric
From main system
electricity (not community)
Room heaters, mains gas
Partial double glazing
double glazing installed during or after 2002
Programmer, TRVs and bypass