England and Wales: 1950-1966
FiT application
System built, with external insulation
Solid, no insulation (assumed)
Low energy lighting in 30% of fixed outlets
Pitched, 100 mm loft insulation
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
none of the above
Cavity wall, filled cavity and external insulation
Solid, no insulation (assumed)
Low energy lighting in 30% of fixed outlets
Pitched, 200 mm loft insulation
Boiler and radiators, mains gas
From main system
mains gas (not community)
Fully double glazed
double glazing installed before 2002
Programmer, room thermostat and TRVs